--- title: "Calca - Отзывы, Доход и Загрузки приложения in Соединенные Штаты | Apple App Store" description: "Calca is a powerful symbolic calculator that gives you instant answers as you type. It solves equations and simplifies complex expressions - it's a computer algebra system in your pocket! It's also a " --- # Calca — Соединенные Штаты > Advanced symbolic calculator ![Calca App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/e0/c8/ee/e0c8eed7-810b-1aa9-304e-37892ecfe35c/CalcaAppIcon-0-0-1x_U007epad-0-1-0-85-220.png/434x0w.png) **Developer:** [Krueger Systems](https://apptail.io/ru/developer/krueger-systems-eqrb) (Соединенные Штаты) **Category:** Productivity **Rating:** 4.6/5 (153 ratings) **Price:** Free **Bundle ID:** com.kruegersystems.calca.ios **Store:** Apple App Store **Country:** Соединенные Штаты **Version:** 1.7.2 (released 2025-10-17) **Original Release:** 2013-07-06 **Languages:** English **App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id635757879) **AppTail Page:** [https://apptail.io/ru/app/calca-IBfc/united-states](https://apptail.io/ru/app/calca-IBfc/united-states) ## Calca Description Calca is a powerful symbolic calculator that gives you instant answers as you type. It solves equations and simplifies complex expressions - it's a computer algebra system in your pocket! It's also a rich Markdown text editor so that you can explain your ideas alongside your calculations. Calca is perfect for professionals and students - anyone who works with numbers and equations. Variables and functions can be created with only a few keystrokes and can be manipulated with a rich library of operators and functions. Calca updates as you type - just like a spreadsheet. You can declare variables, edit their values and watch everything update before your eyes. Since everything is calculated on the device - no network needed - you get answers instantaneously. All calculations are stored as plain text so you can easily share them with other editors and move them from device to device. Calca has been designed to work with iCloud documents so all your devices can access your calculations - you'll always have the latest files ready for viewing and editing. Calca comes with a suite of examples to help you get started covering topics from home mortgages to kinetics. All these examples are fully explained within Calca itself. Are you still using a desktop calculator? Are you using the calculator with the giant buttons that came with your OS? Computers are much more capable than doing simple one-line arithmetic - put your machine to work with Calca! Calculation Features: • Variables `x = 42` • Functions `f(c) = 9/5*c + 32` and even recursive functions • Units `42 mph in kmph` and currency `¥599 in $` • Solves equations (`x + 2x + 4x = 42`, what is x?) • Matrices with inverses so you can solve linear equations • Sum, prod, map, and reduce operations on lists, matrices, and ranges • Trigonometry and complex numbers • Derivatives of functions • Logic operations and if statements • Binary math (& and |) and support for binary and hex number (`0xA9` and `0b1010`) • Keeps track of units (m, s, m/s, m/s^2, etc.) so you can verify your equations as you compute Please visit to see lots of examples. Thank you for looking! ## Calca Screenshots - [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/Purple114/v4/85/18/43/851843c7-056a-58d2-515d-cba15081da9a/mzl.yvzpilrn.png/640x960.png) - [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/Purple124/v4/ea/42/32/ea423203-9c5a-0809-ba80-f675e6940250/mzl.tzopqfyc.png/640x960.png) - [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/Purple124/v4/6d/6c/ee/6d6cee1a-a4c3-40e0-e95d-1789ccf26ef8/mzl.fvspmwtp.png/640x960.png) - [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/Purple124/v4/4b/1a/9d/4b1a9def-2014-c3a0-dac8-8f9b467c6348/mzl.movcuiiu.png/640x960.png) - [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/Purple124/v4/c1/95/18/c1951874-0a83-809a-2998-80566fa9f450/mzl.hfmdkcqd.png/640x960.png) ## Calca Rating Breakdown in Соединенные Штаты - 5 stars: 123 (80%) - 4 stars: 11 (7%) - 3 stars: 7 (5%) - 2 stars: 4 (3%) - 1 stars: 8 (5%) ## Calca Reviews in Соединенные Штаты ### ***** "My favorite app for thinking with numbers" I’m not even a math person but I love this thing. Unlike a spreadsheet, the operations are in plain sight, so they are part of the story. And unlike Soulver (which is also great in its own way) I can interleave text such that I can describe a scenario, make a case, frame the numbers, etc. -- Avi Flax, 2025-11-04 ### ***** "Best calculator app by a wide margin" Calc is pretty much all the good things in one. It lets you enter equations, solves them algebraically, handles graphing, is super flexible and free-form to the point where you think, document, and calculate all at once. -- Connoisseur95, 2025-09-19 ### ***** "Love it!" So useful. Use it all the time on iPhone and my MacBook. -- angzarr, 2025-08-26 ### ***** "Fantastic app" I’ve used Calca for years on iOS and Mac, and I love it for all sorts of computation. The most recent update with iOS 18 support fixes some issues I’ve hit with iPad Pro and Magic Keyboards—I really appreciate it! -- Christian E., 2025-03-11 ### ****- "Not completely accurate" I had hoped that, being based on a CAS, it would be able to handle cases like this: (10^100) + 1 - (10^100) => 0 As you can see (this is pasted from Calca), it does not. The correct answer is 1. -- jthile, 2025-02-17 ### ***** "One of the best apps despite maybe being abandoned" I first got Calca when it originally came out (and way before I did for real 🥲), over 10 years ago. I was in college and I had an iPhone 4s, I think. It had apps, most of them not very useful. Calca was *something else*. Calca could do math, and Calca made it convenient to do math that involved more than just punching in two numbers to get a single result. No longer did I need to break out a spreadsheet (which are still awkward on a phone, even in 2024, even on our now massive smartphone screens). I could calculate the rent split for my college roommates. I could calculate the total cost of a trip for me and my friends, with a bunch of flight tickets, accommodations, and whatever else, with the total cost split between all of us. I could estimate fuel costs given the fuel efficiency of a car. I could calculate means, standard deviations, and other arbitrary statistics on some data I was thinking about (don't you hate not having an app on your phone for figuring out stats for some random piece of data?). I could plot things. And I could annotate it all with Markdown, which I had then only just discovered. All on my phone. It was probably the first app I ever got on my phone that made it very real that this thing I always have on me is actually a legit computer, and having a computer that is always on me is actually useful. (Except for when it's the opposite of useful, but that's not Calca's fault). Calca is not perfect. Over the years, I have encountered a fair amount of weird behavior, and anything really-really complex can still be awkward and error-prone. Calca's unit-aware calculations, while really cool, have also sometimes caused bizarre results. But when it has worked — and most of the time, it has — it has been magical. I only have weird behavior to complain about because I still come back to it and use it, a decade and who knows how many smartphone generations later. I wont deny that I'd appreciate it if the developer came back to this app to give it some love. But also... I get it. 11 years is a *long* time, and I only paid for Calca once (that was nice, by the way, to be able to pay for an app just once, and have it keep working for over a decade). Even if it's flawed, even if it's maybe abandoned, even if I now have a full-blown Python interpreter on my phone, with a whole host of numerical computation and data analysis libraries (imagine that, college me from 11 years ago), I still keep coming back to Calca. If I could give Calca -- notnami, 2024-09-10 ### ***** "Excellent App" This app is unique and there is nothing else quite like it. I use it in place of Excel when multiple calculations are required along with extensive text. That said, it’s been several years since it’s been updated so I’m concerned the developer may have abandoned the project. Calca is among my core apps so I’d be open to a subscription offering to compensate the developer and ensure it remains sustainable. -- LAX20531, 2024-01-28 ### ****- "Love this app, just wish there were more frequent updates" I really dig the approach this app takes to text + free-form calculations. I use Markdown all the time, so that's a bonus, but the app really shines in the way it interprets text and functions in-place. It has far more power under the hood than I could ever use so I only have a few surface-level nitpicks: * Document management on iOS/iPadOs is clunky. * I still hit occasional crasher bugs. * I wish the iOS/iPadOS versions were updated more frequently. I don't think it needs to roll in all the latest platform features, but some bug fixes and polish would be nice. -- E_C, 2022-11-12 ### *---- "No longer usable on iPad" When you're using the Magic Keyboard, you can't type in numbers anymore. Once you type a number, it switches into this weird overwrite mode, where every number you type overwrites the current number. For example, let's say you want to type 1234. You'll type 1, which will appear. Then 2 overwrites 1. And then 3 overwrites 2. And then 4 overwrites 3. So instead of 1234, you just get 4. Useless. -- boldcity, 2022-10-31 ### ***** "Really a fun calculator, spreadsheet and document in one" This is such a useful app, with text documents coming alive as computational documents. Like a spreadsheet in a way, but in a different medium. Truly wonderful -- Mdiza, 2022-10-13 ### ***** "Breaking bug on iPad Pro 12.9 with keyboard" Calca is one of my favorite apps. I use it regularly on my phone, laptop, etc. I desperately wish I could use it on the iPad Pro with Magic Keyboard folio. Unfortunately, in that context, I'm usually trying to total line items under a 'total +=' line. For every line item, when I start typing digits, the app highlights the entry as though I'm cutting / pasting and does not permit me to enter amount normally. I can work around it -- to a degree -- by separating each digit with a non-numeric character, but I usually just give up and go to a different machine. Hoping the developer will see this and determine what causes / resolves the problem. Huge fan, otherwise, and leaving 5 star review because it works on every other device perfectly. -- ratchetcat, 2022-06-03 ### ***** "Edit: BEST CALCULATOR APP" I left a 1-star review a few years ago because I couldn’t create new sheets (“calculations”) in it. But now it’s the only calculator app I use. Functions. Graphs. Units and unit conversions. Markdown for comments. And all with a pretty intuitive syntax that’s easy to get used to. Now that my kids are doing high-school level math, it’s invaluable for checking their work. -- jpjerkins, 2022-01-20 ### **--- "Not functional with Magic Keyboard" This is really too bad because I have been using Calca for years, and there still isn’t anything that compares. You can work around the input bugs by changing your calculations to text with a #, but it’s a pretty bad experience. -- bigkraig, 2021-10-01 ### ***** "Fantastic app, with one modern caveat" I’ve used Calca for years on iOS and Mac, and I love it for all sorts of computation. I did run into one issue: I recently got an iPad Pro with a Magic Keyboard, and it seems to have troubles with the focus system, making numeric entry very, very cumbersome with the Magic Keyboard. -- Christian E., 2021-08-07 ### ***-- "Does not work with iPad keyboard - 12 months waiting" Has not worked with the iPad magic keyboard for more than 12 months. -- 9Claude, 2021-07-19 ### ***** "Great for the toughest problems" This is a mathematical sketch pad that tackles the toughest problems with aplomb. If you like bc on your computer this is much more fun and powerful. Like a spreadsheet it recalculates dynamically. Unlike a spreadsheet calculations are clearly visible, especially when they are complex. -- David H Dennis, 2021-04-21 ### ***** "Great" Very powerful. Helps you communicate concepts to others with natural language assignment of variables. Great support too. Developer responded and stated he would make changes I suggested, -- Augie1000, 2021-03-25 ### ***** "Perfection" I used Tydlig as my go-to for many years, but wanted something a little bit more text based and “functional”. This app is easy to learn and use. One suggestion: my first “problem” was with a function which I tried to evaluate, but forgot to give it an argument. A tooltip or squiggle suggesting I add an argument might be helpful for novices like me. -- jbreeden86, 2020-12-10 ### **--- "Horrible on iPadOS" The macOS app is great so obviously I went to get the iPadOS version. However, this is this version is buggy to the point of being unusable. Typing digits with a keyboard does bizarre things. For a numerical calculator it's pretty important that I can actually enter numbers ffs. -- JonNRb, 2020-04-28 ### **--- "Hi there?" Anybody update the app? The buttons cannot adapt to iOS 13. I can’t click some of them! -- oooo26hjh, 2019-11-14 [View all Calca reviews and detailed analytics on AppTail](https://apptail.io/ru/account/signup?utm_campaign=ai-crawl&utm_content=reviews) ## Calca In-App Purchases | Item | Price | |------|-------| | 12-Month Optional Patronage | $7.99 | | 6-Month Optional Patronage | $4.99 | ## Calca Store Rankings | Chart | Country | Category | Rank | |-------|---------|----------|------| | Топ платных | Финляндия | Productivity | #188 | | Топ платных | Швеция | Productivity | #195 | | Топ платных | Беларусь | Productivity | #215 | | Топ платных | Польша | Productivity | #223 | | Топ платных | Венгрия | Productivity | #229 | | Топ платных | Дания | Productivity | #240 | | Топ платных | Португалия | Productivity | #240 | | Топ платных | Нидерланды | Productivity | #256 | | Топ платных | Сингапур | Productivity | #267 | | Топ платных | Украина | Productivity | #273 | | Топ платных | Россия | Productivity | #278 | | Топ платных | Франция | Productivity | #289 | | Топ платных | Австралия | Productivity | #291 | | Топ платных | Австрия | Productivity | #291 | | Топ платных | Бельгия | Productivity | #295 | | Топ платных | Норвегия | Productivity | #300 | | Топ платных | Чехия | Productivity | #302 | | Топ платных | Новая Зеландия | Productivity | #310 | | Топ платных | Румыния | Productivity | #314 | | Топ платных | Германия | Productivity | #319 | | Топ платных | Индия | Productivity | #323 | | Топ платных | Ирландия | Productivity | #329 | | Топ платных | Испания | Productivity | #332 | | Топ платных | Италия | Productivity | #336 | | Топ платных | Канада | Productivity | #343 | | Топ платных | Швейцария | Productivity | #350 | | Топ платных | Великобритания | Productivity | #351 | | Топ платных | Бразилия | Productivity | #354 | | Топ платных | Южно-Африканская Республика | Productivity | #363 | | Топ платных | Республика Корея | Productivity | #366 | | Топ платных | Аргентина | Productivity | #377 | | Топ платных | Чили | Productivity | #380 | | Топ платных | Перу | Productivity | #390 | | Топ платных | Мексика | Productivity | #399 | | Топ платных | Греция | Productivity | #402 | | Топ платных | Таиланд | Productivity | #418 | | Топ платных | Вьетнам | Productivity | #419 | | Топ платных | Филиппины | Productivity | #419 | | Топ платных | Индонезия | Productivity | #427 | | Топ платных | Малайзия | Productivity | #441 | | Топ платных | Израиль | Productivity | #446 | | Топ платных | Гонконг (САР) | Productivity | #447 | | Топ платных | Турция | Productivity | #456 | ## Calca Discovered Keywords - markdown - spreadsheet - plain text - calca - calca app ## Apps Similar to Calca - [EE ToolKit PRO](https://apptail.io/ru/app/ee-toolkit-pro-vB/united-states) - [OmniOutliner 3](https://apptail.io/ru/app/omnioutliner-3-PZQ/united-states) - [Zavala](https://apptail.io/ru/app/zavala-LXT/united-states) - [Tot Pocket](https://apptail.io/ru/app/tot-pocket-LQdb/united-states) - [beorg: To-Do List & Agenda](https://apptail.io/ru/app/beorg-to-do-list-agenda-dIjb/united-states) - [iA Writer](https://apptail.io/ru/app/ia-writer-fekb/united-states) - [Rocket Typist](https://apptail.io/ru/app/rocket-typist-RxYn/united-states) - [Funnel - Quick Capture](https://apptail.io/ru/app/funnel-quick-capture-vlIo/united-states) - [Simple Scan • Quick Scanner](https://apptail.io/ru/app/simple-scan-quick-scanner-xIop/united-states) - [Bebop: Quick Notes](https://apptail.io/ru/app/bebop-quick-notes-JzVp/united-states) ## Calca Available In - [Соединенные Штаты](https://apptail.io/ru/app/calca-IBfc/united-states) - 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