Kalkulilo (Calculator) Customer Service

Kalkulilo (Calculator) Positive Reviews

Extremely functionalYears after first finding it, this continues to be my default calculator on iOS. It’s easy to use, doesn’t push ads, and has any and every feature short of actual graphing that you might need to do some quick math..GramathyVersion: 5.0

Excellent calculator!This is my go-to calculator for iPhone. It has everything you need for scientific, bit/integer, and statistics. I feel it was written for programmers. There are many cool options such as adjustable bit depth, etc. The negative reviews complaining about ads should pony up the money and buy the app!.12barVersion: 4.6

CalculatorYou should add a calculus calculator, linear algebra calculator, and probability. I love this calculator app.UuruhdgegdbVersion: 5.0

My favorite calculatorI love this calculator. The only problem I have with it is when you are working in scientific mode then switch to bit mode the number doesn’t transfer over correctly. Even when it’s an integer. Is it in floating point representation or something?.Rylar99Version: 5.0

Just what I needed!I'm visually handicapped, and I've looked all over for a decent, well-designed calculator with the functions I need. The contrast on the button layout is helpful. In earlier versions, I was annoyed by some rather poor VoiceOver support. It seems to have improved greatly, and as a bonus the developer has now added support for the Apple Watch! What's pleasing is that the Apple Watch support is actually well thought out. It works far better than other calculators I've tried on it. It was immediately usable and I am highly appreciative of that. I've finally reached the point where I am deleting the other calculators I use. This app now does it all for me, and does it well..BasenjiBuddyVersion: 3.5

A Pleasure to UseStart with a full function calculator that has every mode you might want, including scientific, statistics, trig, binary, even a mode for time and circular angles such as latitude and longitude. Now add a customizable user interface that is not merely useful, but beautiful, and this wonderful app is what you get. I especially love being able to easily find different groups of functions by setting them to different colors, like pink for memory, green for trig, and greenish blue for roots and logarithms. The buttons and number display are very easy to read even on a small iphone. This is one of my 'must have' apps..SuecqueueVersion: 3.5.1

Excellent apart from the keyboard clickThis is the kind of calculator that should have been included with the iPhone as standard (as an advanced mode within the Calculator application). The layout is good and while there's a lot of color, it's used to good effect to help group keys by function. My only real complaint is the very loud and sharp keyboard click sound. If there's a way of turning it off/down, I've not located it..LittleJon2000Version: 0

Moving ForwardI loved this app, I truly did. Until... I updated it. This app has been extremely useful and totally user-friendly, but the new interface... I don't know why it had to be changed. This app has helped me through physics, biomechanics, chemistry and other functions that entailed a calculator. I want to thank this app for everything, for being the best and absolutely free. But now I think I am sticking with the Calculator+ app. For those who like editing and dislike ads, this is the app for you. Bye and thank you again. I thought updating should move the app forward, make it better and not regress..Zirconian777888Version: 3.0

Great app, some adviceOne thing I would like to do with the binary calculation feature is enter in some number in binary, then shift it by some integer like 3. Unfortunately if you are in binary mode then press the shift button, then want to switch to decimal mode to enter in the integer, it loses the shift operation and thinks that you are starting a new operation. There might be more little stuff like this. Otherwise, has fantastic features..BboyDubCVersion: 0

Best Apple Watch calculator!!!This is the best calculator that I have found for the Apple Watch. First, the screen is well organized and uncluttered. Secondly, the app is native so button responses are fast. Lastly (and perhaps best) the calculator takes advantage of haptic feedback to confirm button pushes! Finally, a suitable replacement for my Casio CFX-200! It would be nice to have a 'back' button to erase mistaken entries, and perhaps a list of constants, but as it is it is a terrific piece of programming! Bravo!.GeohoughVersion: 4.0

Excellent general purpose calculatorBig thumbs up to Touchcalc! Apple's built-in calculator is nice, but it's missing power-of-10 and the "exp" function is implemented weird and I hate the sideways orientation--Touchcalc gets all these things right and is the only non-RPN calculator I've found that truly replaces my trusty old radio shack scientific calculator. I do wish the arithmetic symbols (+, x, -, ÷) were larger--it's hard to distinguish easily between the + and ÷ and ± symbols. If these were fixed, I'd give it five stars..BartzumbariVersion: 0

Yes, you can delete the adsI love this calculator even with the ads, but for all of you that complained you weren't told that you could pay to delete the ads, you should learn to read. The description states you can pay to delete the ads and you can, because I did. I like all the different calculator options and the sections divided using colors. Great app for $0.99 without ads..Sail2AussieVersion: 3.0

Simple, Scientific, & the Kitchen Sink!I have had this calculator for some time now. Various "modes" are: * Simple * Scientific * Bit/Integer * Statistics * Trigonometry * Base/Radex * Time Scientific/Statistics Mode has "Norm/Exp/Eng", "Precision" slider, and a toggle for "Double Operators. Bit/Integer Mode has "Number Bits "8, 16, 32, 64", at the moment. There are "skins", as well (see Preferences > User Interface I put my iOS calc in extras and put this one in its place. I keep on Simple, for default. I have used the other modes (Time is new) periodically, and it hasn't failed me. I felt Alexander Clauss deserved the .99 cents for such a well made tool and his continued service and support! Thank you for continued perseverance with this "Kalkulilo: "pocket calculator!".JproseVersion: 3.2

Nice but incomplete; consider UI design...OK, this is very nice, it offers essentially 2 functional modes that aren't in the built-in calc: the Bit/Integer mode & the Statistics mode. This is significant - but odds are most people won't actually need these functions. The main drawback to TouchCalc is that it is pretty ugly. Sorry... the colors don't actually help usability. And it's getting an extra star for being free.... It is cool if you need these extra functions - otherwise, not sure why the average user would need this..Tempus23Version: 0

Very nice calculatorI use the scientific mode and the hexidecimal mode and they are very nice. I found buttons to be a tiny bit too small for my big fingers, but not bad. There is a small issue with the engineering exponents when there is a negative exponent. It displays positive like this: 2.345E+6 but negative like this 2345E-9 This latter one should be 2.345E-6. Not a big deal but causes you to have to think about which way to change the exponent..Perfectionist EngineerVersion: 0

ExcellentStill my favorite calculator after trying many others. This calculator actually works for scientific calculations, including proper handling of scientific notation. So many others seem oblivious to how scientists actually use calculators in this respect. They are more programming exercises than useful calculators. However, I do subtract one star for the glaring omission of the option to temporarily force results to display in scientific notation without changing modes..BuchemVersion: 2.0

Excellent free scientific calculatorIntuitive and easy to use. Has lots of functions, statistics, etc. Great for a free calculator--other free calculators are lite versions that make you pay extra to get these features. Have tried several other free calculators and deleted them after a few days. This one is a keeper!.Dad2theBoneVersion: 0

BlaghNo use at first it worked great, but now it can't even get it to do a simple addition problem. It starts out working beautifully, but then becomes less and less accurate, until it doesn't do anything. You can type the numbers and see them on the screen, but then it doesn't solve the equation. And this all happened within ten or twenty minutes after i downloaded it..J'aimedetesteVersion: 0

Better than all the other calculators out thereI've been using this calculator for programming at work for a long time now. It's definitely better than all the other ones out there. One thing I would suggest is adding a 'mod' function to one of the modes, as that is a very helpful function for programmers (unless it's there somewhere and I just can't find it?)..GigAppsVersion: 3.0

Wonderful treatI love the scientific function, the ability to program multiple calculations. Very helpful to go shopping when you have to calculate all the discounts and the tax etc before you make your decision to buy. Thank you so much for the great work. Love the functionality and the look..AphilionsVersion: 0

Awesome!I know that the itouch's calc does all the same stuff, but since it was inconvinient for me to flip to landscape mode and keep it there while doing homework, I used this app instead to help me pass chemistry. I like the style and interface better. I would replace the original calc with this If I could..CaseyLAYVersion: 0

Love it - needs iPhone 5 size updateI use this app all the time in my engineering job. Features are great! The only thing that's ever slightly bothered me is that all the keys are a little small. I understand why - it's needed to fit them all in. However, with the new larger screens on iPhone 5, stretching the keys vertically would be a welcome update..KaneVersion: 2.0

Watch app not quite readyNoticed the app showed up on my watch after the last update. As a basic calculator on the app it seems to be good on the 42mm watch.. one problem that makes it unusable is that the number 9 button on the app is mapped to the number 8!! So when you push 9 the number 8 comes up (not a pudgy fingers problem)..MarinesciVersion: 3.5.1

Great job! Could the memory be persistent?Great app. One annoyance, the memory contents are reset if you quit and come back to the application. Though the current value in the main display is preserved. It'd be nice to preserve the memory contents as well. A nitpick, the Min key is not very useful. MC followed by M+ achieve the same result. Many thanks..LonicoVersion: 0

Can't believe it only costs...nothing?This has more features than any one of the paid apps I looked into buying. Works great for binary calculations and conversions too. Extremely east to use. Even greys out buttons not used, ex. Only 1 and 0 are usable in binary mode. Thanks a lot!.DumbArseDudeVersion: 0

What a nicely done app!I've uninstalled the other scientific calculator apps I've tried and settled on this one. It cleverly merges several different calculators into one so you don't have to deal with second and third function keys. Setup and preferences is intuitive. Makes the iPhone a good workable calculator for a working engineer..Robinhood88Version: 3.0

AmazingI'm kinda mad that I really didn't look for a calc but really glad I found this and that to it is free the only problem was that the keys were a bit too small but other than that it is great for math analysis and physics which is what I use it for tnx sooooo much.EeSh4335Version: 0

Great for quick scientific calctns...!I use it when giving tech seminars or trainings and it's great, plus I don't feel like I need to be pulling my reading glasses every time I use it. Typing can be a bit tricky because all the "keys" are so tightly laid out, but it isn't so bad anyway... Great free app, Keep upgrading it!.AndysoundVersion: 0

Exactly what a calcuator should beHex! binary! plus loads of other stuff! it has everything a REAL calculator needs (not that lame thing that came with the iPod) just perfect. looks great, works great, easy to use and configure. and it's FREE. if you are looking for a calulator then this is the one you need..The monkeyhouseVersion: 0

A+ certifiedI love this the org. calculater did not have the hex and binary option on it I'm in classes adding certificates to a comp sci degree this is one handy app if u need to do hex and binary conversions. I love it 5 stars. A back button would be a lil helpful when ur punching in well over 32 ones and zeros..Mr.HalvorsonVersion: 0

Thanks for the binary/octal/hex calculator![Version 1.0 comment: Please add a mute button in Preferences (or better, if possible - check the phone's Keyclick sound setting to see if it's set to Off).] Version 1.2 added an option to turn off the keyclick, so I upped the review from 4 starts to 5..GS/LSVersion: 0

Elegant!Great layout. As a computer scientist I appreciated having all of the log functions and inverses laid out above and below each other. Thanks for the price, I can't imagine what gimmicks the pay to play alternatives offer..JaronsampsonVersion: 0

Nice, Easy Calculator AppI appreciate and need the three different calculator modes. This was exactly what I was looking for and am glad I found it after wading through many that didn't suit my needs..IBill50Version: 0

AwesomeI've been waiting for a free calculator to do binary (hex really) math with. This works great. Super useful when I need to do some quick bitwise math while programming. The layout is solid and I like the mode selection button..Yertle38Version: 0

Powerful calculator, awful colorsThis is a very nice calculator and great that it's free. My only quibble is that the color scheme for the buttons is hard on the eyes because the colors do not match. Can you please change the colors to more neutral pastel tones? I'd give it 5 stars if you did that..FrandoggerVersion: 0

Great Calc App!This is probably the best calculator app I've yet seen for the iPhone. I particularly like the bit/integer functions. It's too bad that there are spammers and other somewhat uninformed people submitting bad reviews to presumably keep its rating low..YucatecoVersion: 0

Great for HomeworkI downloaded this app for my homework on finding the circumference of circles. The calculator on my phone doesn't have buttons for pi or 2x so it was pretty difficult to do it. Once I downloaded this, I finished my homework easily..DauntlessInitiate357Version: 4.1

Good to have itI think it's a good app. Because it does more than the iPhone itself has. I urge people to get it free than buy a scientific one in other store if they can use it in class..AffoVersion: 0

UmSure this is a very nice app...but I hope everyone knows they can make their iPod's calculator look like this, just by turning it on its side. Well, there's no point in giving this a BAD review, so five stars it is..AriegeoisVersion: 0

B+Wow! This cac. Has good featurs. I like how you can sqare numbers by one or two or three. There's only one problem that I don't like it when you press the plus botten more than once but it dosent work! Other wise it's good. Just change that issue to get an ''A''.Ozzys best fanVersion: 0

Perfect!This calc program does more than I expected. The comp sci mode is especially useful, since it allows bin-hex-def conversions, with an ASCII and unicode translation, too! The vanilla sci and stat functions work well, too..SsinclairVersion: 0

TouchcalcNot having a binary mode on a calculator is a deal breaker for me. This is the only free calculator I've found that has it, in addition to all of the standard scientific and statistical functions..Robt105Version: 0

GreatI'm an 8th grader in precalc and this has made my life so much easier. I have only 2 complaints: the buttons are crammed and you also can't tell if the operation you're looking for is in 1st or 2nd. Other than that, I love it..Smartguy16Version: 0

Ads or not to addTrue the developer put ads in the free app without warning. Bad plan. But I do prefer the new look, and the supported features better than the old app, and I am not bother by the ads. I use the app on an ipad and there is plenty of screen space. I will keep it for now..Working iPadVersion: 3.0

Simple and usefulMaybe an update for better compatibility with iOS 4?.Miles_ZhangVersion: 2.0

Best calculator on the App StoreI saw that this calculator had only two reviews so I just felt compelled to write a review myself. I’ve had Kalkulilo for 5 years now and it helped me immensely through a computer science and math degree. If you care about math, you will appreciate the vast array of functions and different types of calculators, like one with selectable number base systems from 2-36. It can do everything but graph. And even if you don’t care about math, I find the time calculator that can do arithmetic on hours minutes and seconds often useful on a daily basis. I recommend this calculator to everyone, but especially people who do lots of math and need a diverse calculator..Great game companyVersion: 5.0

Now contains ads and poor colour scheme!Was a great app, now just ok - colours are bad for those of us with colour-blindness. Maybe an option to set the colour scheme should be considered..LysynskiVersion: 3.0

Most Complete YetThis is the most complete and most useful professional calculator yet. I keep trying others and coming back to it! One thing that I would love to see is a mode (signed decimal) where negative numbers are displayed with a minus sign..BrunoP1Version: 2.0

Pretty good, buttons are too smallThe overall is good, but the buttons are small, and when switching from degree, radient, and gradient, it is very hard to see which one I selected. Also, the colour is dull..Calculator expertVersion: 2.0

Near PerfectThis is a near perfect calculator, espescially since it is free. Now if they could just implement the application to work in landscape mode it would have me rate it as *****..1136Version: 0

Mostly all you needI'm tutoring someone in Grade 11 math.. One problem I'm finding is that the calculators are WAY too complicated these days. And I'm thinking most students cannot use anything more than the basic math stuff, because they've lost the manual and there is absolutely no way to figure it out. This calculator would do so much of what a high school math student would do.. Now you can't do complex math and linear algebra.. you might need another calculator for that.. but this does virtually all the basics. I especially like the statistics section. Very easy.. Create a list with D+/D- and then use a function on it. So while some might think this is not powerful enough.. no 2-var stats, complex math, or linear algebra, for instance.. At least students will use the functions on it. I really like this app. I've bought 3 other apps.. and for some stuff, this is better..DaveCrVersion: 2.0

Needs backspaceThis app needs a backspace button to correct frequent typing errors on the iPhone..AndrewpmkVersion: 0

Very good calculatorIt's a scientific calculator. And it works. The inclusion of bit/integer and statistics modes makes it even more powerful than you'd expect at first glance. The interface is easy to use and the help glossary is nice. This is an excellent replacement for the default calculator for anyone looking for more functionality..Edmund OngVersion: 0

Simply the best free scientific calc in app storeI use it all the time for hexadecimal calculations and conversions from hex to decimal (took a while to notice the configuration setting to change it from the default 16 to my needed 32 bits though). The C key clears the corrently entered number only so I can fix a typo without re-doing the whole calculation, and the option to use engineering notation makes working with large numbers much easier. My thanks to the author for putting so much functionality into a free app!.Cwm100Version: 0

Great calculatorAbility to delete last number would be nice. Thanks for the great calculator..User_6479Version: 0

Just greatI think this is one of the best apps i have on my ipod touch, i even dont have a calc like that by myself and im gonna use this for a lot of things, best of all is, it is free!! You should really get that.....MathfansVersion: 0

Very nice.I have other calculators are are about as good, but that doesn't detract fron the fact that this is a really nice application. We executed and has a rich feature set. The color scheme is not for me, but that's a very trivial detail..PlasmaclarkVersion: 0

UsefullGood design. No missing buttons and no useless ones either Thx for this program.MorphlinVersion: 0

3 starsDecent app but it didn't turn side ways and the buttons seems a bit cramed.Professional reviewerVersion: 0

Nice app!This is certainly much more featureful than the Apple calculator. My only gripe is that hitting the 'mode' button to see the instructions wipes out the Stat data; it would be better if this wasn't wiped unless you change modes..SovetskysoyuzVersion: 0

It great!I use this is math.. it great!.Jillian PeddleVersion: 0

Best Free (Maybe Even better than ones for sale)A free calculator which has all features of a scientific calc. many of the other apps which have lots features for a calc cost money and as some wit no money i cant afford 2 bucks :).Cheema360Version: 0

Great app!This is an excellent app. Thanks for making it free..MjguyVersion: 0

Excellent!Perfect replacement for the Apple app. Key sizes are just right..ToddalopolisVersion: 0

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Kalkulilo (Calculator) Negative Reviews

I will be looking for a new calculatorThe previous version of the calculator was all that I needed as an engineer/programmer. It had all of the functionality that was needed and Iwas content with it not being updated any more. That said the new version adds iAds and changes the color scheme. I understand the desire to get paid for your work as you should be. Unfortunately the implemetation of it in this program is poor. Evening moving the ads to the bottom of the screen would help. I liked the amount of space afforded to the display (the non-keypad part of the calculator) in previous versions. It seems that this is where all of the space was taken from for the ad. A splash screen with an ad would be better than and iAd banner. Now the other problem is the color scheme. It looks like an engineer or programmer came up with it. It may be functional but it is not appealing. The old color scheme was much better.I know I can change the colors for my buttons, but it would be better if the original scheme was default. As a side note how in demand was this feature? I know it is a free app and I can go elsewhere. That is exactly what I will be doing..Dcm684Version: 3.0

Ads without warningThis isnt the first app I've had that tried to blackmail users into paying money to get rid of advertisements and it will suffer the same ignomious fate of being deleted. I understand the developer is trying to make money and I have no issue with that. But the honest way would've been to release it as a new app rather than an "update". To retain the forced advertising of the new pay app an "update" that consisted of a new app advertising alert on first launch would've been sufficient. Time to look for another app. I'm willing to pay, but it won't be to this unethical developer..ThoromyrVersion: 3.0

Ok but fatal flaw in bit/integer modeI was fairly happy with this calc until i realized whenever you change from scientific mode to bit/integer mode you lose the value you are working with. Even putting the value in the memory doesn't work. I could not figure out a way to do calculations in scientific mode and then convert the result to hex. Cut / paste is not an option because I like wifi too much to upgrade to OS 3.0..Greenstem on iPhoneVersion: 0

The problem is that the fonts are too smallI find this app unusable as the fonts are too small (at least for me with my bad vision). There is plenty of room to make them bigger even with the existing layout, but a better layout with fewer keys are more modes would be even better since then they could be even bigger! There is no font pref either..Jg167Version: 0

For you ignorant people out there...For you ignorant people out there, this is essentially the same thing as the original iPhone + iPod touch calculator in landscape mode. It may look lame once you enter it, but turn it 90 degrees and it will look like the same thing as this TouchCalc. Sure the original leaves out buttons like cotangent, hex, etc., but those are insignificant. This is a waste of 0.1MB..JustintranVersion: 0

Be honest with your change logWhy would you not put adding adds in your change log? I have used your app since it was released and would have been willing to pay for it. I have recommended your calculater to all my friends but will now search out a new app that does not put adds in without telling and then recommend that app to tell. This shady move has cost you a life long customer..OneDiscipleVersion: 3.0

No needI thought the iPhones native calculator was too lmtd, but turn it sideways and it basically does everything. So deleting this one now.OhheyitsBradleyVersion: 0

Get a backspace button.Yep. Backspace. And ditch the ads..EvanrabbyVersion: 4.1

Good, but.....Works good. But I paid to remove add's and they keep pushing USLESS annoying add's. Makes me wonder what for I paid ???.WakeMaster2011Version: 3.0.1

TastelessI would gladly support you, but ads are tasteless and super anoying..VitulanoVersion: 3.0

ReviewSo sik i give this a borat HIGH FIVE lol.UnderstylesVersion: 0

InLooks AWSOME but I can't open it. When I tap it it says 'cannot be opened' ??????.AucoinadamVersion: 0

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