This utility app provides a Reverse Polish Notation (RPN) calculator. Users can extend its functionality by programming custom functions and equations using JavaScript.
ThetaCalc by Felix Stehli
Editor's Choice
🔧 Utilities
4.3(4 ratings)
Free
Best BrainHack alternatives: apps like BrainHack
10+ similar apps compared and reviewed
4.6 avg rating
8 free apps
Updated October 2026
BrainHack is great, but it's not the only option. Explore 10+ similar apps for iPhone and iPad, each reviewed and rated by real users. Find free alternatives, premium upgrades, and hidden gems.
Top Alternatives to BrainHack
0.0(0 ratings)
FreeIn-App Purchases
SimpleColor - Color Manager by Binary Coalescence Inc.
Color capture and conversionWorth Considering
🔧 Utilities
5.0(1 ratings)
$1.99
Capture, convert, and organize colors using component sliders, hex input, or live camera feed. Save colors to palettes and sync them across devices. Supports multiple color representations like RGB, HSV, and CMYK.
