TechniCalc Calculator

Why choose this calculator over any other in AppStore: (1) It is most versatile, while not trying to emulate a classical hardware calculator (like «15C Scientific Calculator», probably the best application of this kind in AppStore), nor offering useless frills for those in permanent need of entertainment. In short, it is for those who do indeed need …well, a calculator, without the illusion of holding one in ones' hands. (2) The developer does not harvest nor sells any of your data. In the meantime this respectful attitude towards one's users has become quite rare. I am very thankful for this. (3) The developer offers his application for free, and leaves it to each user's sense of decency to put some money into the «tip jar», or not. –––– 2 years later: (a) I continue to like this well designed app, but Jacob Parker (the developer) does now collect «Diagnostics». How much this is linkable to an identity is everybody's guess. (b) there is no way to leave a second tip for Jacob. This is, of course, a AppStore decision, to discourage developers strenghten their relations with their users. I have no reason to assume that Apple allows oversights, neglects glitches. (c) the size of the TechniCalc window cannot be changed! This is really strange, but I have seen this also before, mainly in applications developed in Germany. It is beyond me, why some developers, like Jacob, go out of their way to disable resizing windows, which is something so basic to expect. ––– Maybe I should clarify point (c) above: I expect to be able to resize the TechniCalc Calculator like any other macOS window, by dragging-and-dropping a any of the four corners of its unique window. I hope this clarification helps. (d) I resent not being able to just e-mail the developer Jacob Parker, and I am obiged to join some social medium to communicate with him. What is wrong with just e-mailing?

I’ve been using this app for well over a year as a daily driver and I don’t have a single bad thing to say about it! The natural language layout mirrors the best scientific calculators on the market, but with the flexibility of a smartphone the functionality is vastly superior. The communication between myself and the developer during beta testing is top-notch with fast turnaround for bug squashing as well as helping to implement UI improvements & new features! The attention to detail and build quality is well worth me recommending this app to anyone reading this review.

Wish I could adjust font size to be bolder and larger on ipad.. Needs to be more functional in low light and outside.

This is a really beautifully designed scientific calculator, even for basic maths. If I had this 10 years ago I would’ve aced statistics class

Coming from android to iOS, there was exactly one app that I missed dearly: algeo calculator. This absolutely replaced algeo (and is better in many ways), and it deserves to be noticed. From what I can see, the developer is highly active and responsive, and moreover he pledged to not require a subscription plan. There is no other choice: I’ve tried dozens of calculator apps in iOS and they all come up short, between ugly expression formatting, forests of parentheses to denote simple expressions, or lack of specialized functionality like linear algebra or complex arithmetic. To the dev: you deserve my money, but you also deserve my gratitude. Calculators are so central to so many professions, and having an excellent calculator app available is irreplaceable. If you’re wondering why apple doesn’t have a default iPad calculator app, it’s because they must be waiting to acquire this one.

So far the best calculator I've used. Really simple but allows for complex calculation and lots of flexibility. Intuitive to use and it looks good. I like the reference area. And the settings are fantastic!

A vast improvement over the baseline apple calculator, especially on iPad. The interface is understandable and pleasant, and I can imput complex multi-operation calculations without worrying if I messed up order of operations, like on the apple standard calc. My only two complaints are 1) The unit converter is time consuming to change units, especially when it's often the same few conversions. It would be nice to have a 'Favorites' menu to save conversions. 2) It'd be useful to have a widget of the app so I can access it without constantly opening the app. Regardless of the two things, this is still the best calculator app I have used.

First and foremost, I’d like to thank you for developing the best iOS calculator for scientists and engineers. It is simply a joy to use on the iPad, and the features are invaluable. I’m a professor of Physical Chemistry, and the “constants” feature is a huge time saver. I love that recent constants are shown on top for easier access. Also, having the ability to build equations with fillable numbers makes this a great pedagogical tool and a quick way to solve problems using the same equation. I will be encouraging my students to consider this app seriously, and after my class demo today I’m sure they’ll be impressed. I have two suggestions. Saved equations and other settings (e.g. list of common constants) do not carry over to other iOS devices. This syncing is important especially if you’ve created a large number of equations. Secondly, it would be great if there’s an easy way to solve for parameter in an equation. For example, hc/L = 2E-4, where h = Planck’s constant, c = speed of light. Solving for L (wavelength). This is a simple example and I tried using solver mode but doesn’t work. Problems like this don’t need initial guesses. Maple on a PC and Mac does this flawlessly, but their iOS calculator lacks most of the features in TechniCalc. Again, thank you for providing a real useable solution to many people!

This app has intuitive beautiful UI, with well thought out UX flows I use this everyday on my iPad for college and it is worth every dollar. Thank you

UPDATE: The developer freaking did it! He/she took my request below and added it as a feature. Love the app and love the support to actually take customer feedback. Just left them a donation as thanks and changed my rating from a 4 to a 5 🤩 I switched from Android to Apple and needed an Apple calculator to replace the Hiper Calc Pro I had been using. This is the closest thing I found but is still missing one of my most used features which is decimal to mixed number form (ie converting 2.4 to 2 and 2/5). This was EXTREMELY useful for woodworking and I hope they add this in the future.