I've been working on a scientific calculator in my free time for a little over 8 years now. The aim is to have a full-featured calculator with a feature-set comparable to your TI84, but with a completely modern, intuitive UI that you'd expect of any high-quality iOS app
I've spent a lot of time on the UI, and I like to think Apple took a few pages out of my book in their latest iOS 18 update. TechniCalc has a fantastic editor that lets you see the whole equation - so you can know you didn't enter a number incorrectly a few calculations ago. It also has a cursor so you go back and edit parts you may have mistyped. The vertical keyboard lets you to reach over the 40 buttons with a single tap, and less common buttons are available through popout menus - much like when you press and hold on 'a' on your keyboard, you can access ä, ǎ etc.
It has a unit converter, currency converter, graphing, equation solvers, linked variables, over 100 constants (you can add your own too!), and a formula book for saving commonly typed equations (or just difficult to remember ones)
For the people who need advanced maths, it supports imaginary numbers, vectors, and matrices
It's a paid app with a simple model - you pay to download it and there's no subscriptions. One purchase will unlock the app on iOS, iPadOS, and macOS, and iCloud will sync your settings over. The only IAPs are tips for anyone feeling extra generous - they don't unlock any features
I'd love to hear your feedback!
You can see the marketing page here, and a direct link to the App Store here
I've spent a lot of time on the UI, and I like to think Apple took a few pages out of my book in their latest iOS 18 update. TechniCalc has a fantastic editor that lets you see the whole equation - so you can know you didn't enter a number incorrectly a few calculations ago. It also has a cursor so you go back and edit parts you may have mistyped. The vertical keyboard lets you to reach over the 40 buttons with a single tap, and less common buttons are available through popout menus - much like when you press and hold on 'a' on your keyboard, you can access ä, ǎ etc.
It has a unit converter, currency converter, graphing, equation solvers, linked variables, over 100 constants (you can add your own too!), and a formula book for saving commonly typed equations (or just difficult to remember ones)
For the people who need advanced maths, it supports imaginary numbers, vectors, and matrices
It's a paid app with a simple model - you pay to download it and there's no subscriptions. One purchase will unlock the app on iOS, iPadOS, and macOS, and iCloud will sync your settings over. The only IAPs are tips for anyone feeling extra generous - they don't unlock any features
I'd love to hear your feedback!
You can see the marketing page here, and a direct link to the App Store here