---
title: "ThetaCalc - Reviews, Revenue and Downloads in United States | Apple App Store"
description: "ThetaCalc is a RPN (Reverse Polish Notation) calculator which can be extended by functions and equations programmed by the user in JavaScript."
---

# ThetaCalc — United States

![ThetaCalc App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/30/69/d5/3069d555-81c1-f140-1bf5-f94128f3ccce/AppIcon-0-0-1x_U007emarketing-0-8-0-85-220.png/434x0w.png)

**Developer:** [Felix Stehli](https://apptail.io/developer/felix-stehli-NGH)
**Category:** Utilities
**Rating:** 4.3/5 (4 ratings)
**Price:** Free
**Bundle ID:** net.grayfrog.ThetaCalc
**Store:** Apple App Store
**Country:** United States
**Version:** 2.0 (released 2026-05-17)
**Original Release:** 2020-07-06
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id1521614636)
**AppTail Page:** [https://apptail.io/app/thetacalc-doAc/united-states](https://apptail.io/app/thetacalc-doAc/united-states)

## ThetaCalc Description
ThetaCalc is a RPN (Reverse Polish Notation) calculator which can be extended by functions and equations programmed by the user in JavaScript.

## ThetaCalc Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/74/30/c1/7430c13d-7979-c73f-9484-06274e131e32/0aa68770-5781-40b4-8808-b65969dfa5a1_Simulator_Screen_Shot_-_iPad_Pro__U002812.9-inch_U0029__U00285th_generation_U0029_-_2021-06-11_at_13.46.52.png/2048x2732.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/ee/b1/0c/eeb10c29-9af1-fc37-fd4a-ddb1830322f8/fe22b77e-8a2c-4acb-b396-b26ac54f15bf_Simulator_Screen_Shot_-_iPad_Pro__U002812.9-inch_U0029__U00285th_generation_U0029_-_2021-06-11_at_13.46.57.png/2048x2732.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/36/a3/bd/36a3bd6d-b067-a51b-e5d3-747de2f06524/7c69ba92-f961-40c5-8ca4-b01b7784ce32_Simulator_Screen_Shot_-_iPad_Pro__U002812.9-inch_U0029__U00285th_generation_U0029_-_2021-06-11_at_13.47.09.png/2048x2732.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/9b/02/d7/9b02d7c7-93cb-7e67-aefe-87c9e3d912e8/7ca55998-0d24-442e-979d-95d7d887e530_Simulator_Screen_Shot_-_iPad_Pro__U002812.9-inch_U0029__U00285th_generation_U0029_-_2021-06-11_at_13.47.21.png/2048x2732.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/45/5e/2d/455e2d52-e8b5-344f-6d2b-24d645593a49/828041f3-a50e-45d4-a032-0e6a78b961be_Simulator_Screen_Shot_-_iPad_Pro__U002812.9-inch_U0029__U00285th_generation_U0029_-_2021-06-11_at_13.48.01.png/2048x2732.png)
- [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/ae/7f/8b/ae7f8b94-0ff4-bedb-4eb6-3bafbda296c4/c7d82026-5a76-420f-8275-1ddd37a61749_Simulator_Screen_Shot_-_iPad_Pro__U002812.9-inch_U0029__U00285th_generation_U0029_-_2021-06-11_at_13.48.18.png/2048x2732.png)
- [Screenshot 7](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/62/ac/f0/62acf03f-0805-6aee-a2d8-a64df4ef7523/a9cf0a78-1a50-46ef-8c41-d158fafee25a_Simulator_Screen_Shot_-_iPad_Pro__U002812.9-inch_U0029__U00285th_generation_U0029_-_2021-06-11_at_13.48.25.png/2048x2732.png)
- [Screenshot 8](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/29/1f/ed/291fed78-457e-ef74-4d71-a02ec9fcd19b/530cefd7-9d80-4838-9aec-b4b451f129c7_Simulator_Screen_Shot_-_iPad_Pro__U002812.9-inch_U0029__U00285th_generation_U0029_-_2021-06-11_at_13.48.31.png/2048x2732.png)

## ThetaCalc Rating Breakdown in United States
- 5 stars: 2 (50%)
- 4 stars: 1 (25%)
- 3 stars: 1 (25%)
- 2 stars: 0 (0%)
- 1 stars: 0 (0%)





## Apps Similar to ThetaCalc
- [bcRPN](https://apptail.io/app/bcrpn-WnAc/united-states)
- [RPN-kalkylator](https://apptail.io/app/rpn-kalkylator-XDFc/united-states)
- [Dozecal](https://apptail.io/app/dozecal-aEFc/united-states)
- [Halcyon Calc](https://apptail.io/app/halcyon-calc-BsKc/united-states)
- [Command-Line Calculator](https://apptail.io/app/command-line-calculator-YQOc/united-states)
- [GO-29 SciRPN](https://apptail.io/app/go-29-scirpn-afed/united-states)
- [RLM-11CX](https://apptail.io/app/rlm-11cx-Hmvd/united-states)
- [GO-21 SciRPN](https://apptail.io/app/go-21-scirpn-SGEe/united-states)
- [RPN Scientific Calculator](https://apptail.io/app/rpn-scientific-calculator-HTJf/united-states)
- [RPN-97 Pro](https://apptail.io/app/rpn-97-pro-hpkl/united-states)

## ThetaCalc Available In
- [United States](https://apptail.io/app/thetacalc-doAc/united-states)
- [United Kingdom](https://apptail.io/app/thetacalc-doAc/united-kingdom)
- [Canada](https://apptail.io/app/thetacalc-doAc/canada)
- [Germany](https://apptail.io/app/thetacalc-doAc/germany)
- [Mexico](https://apptail.io/app/thetacalc-doAc/mexico)
- [Sweden](https://apptail.io/app/thetacalc-doAc/sweden)
- [Australia](https://apptail.io/app/thetacalc-doAc/australia)
- [Brazil](https://apptail.io/app/thetacalc-doAc/brazil)
- [Belarus](https://apptail.io/app/thetacalc-doAc/belarus)
- [Switzerland](https://apptail.io/app/thetacalc-doAc/switzerland)
- [Chile](https://apptail.io/app/thetacalc-doAc/chile)
- [China](https://apptail.io/app/thetacalc-doAc/china)
- [Colombia](https://apptail.io/app/thetacalc-doAc/colombia)
- [Cyprus](https://apptail.io/app/thetacalc-doAc/cyprus)
- [Czechia](https://apptail.io/app/thetacalc-doAc/czechia)
- [Denmark](https://apptail.io/app/thetacalc-doAc/denmark)
- [Dominican Republic](https://apptail.io/app/thetacalc-doAc/dominican-republic)
- [Algeria](https://apptail.io/app/thetacalc-doAc/algeria)
- [Ecuador](https://apptail.io/app/thetacalc-doAc/ecuador)
- [Egypt](https://apptail.io/app/thetacalc-doAc/egypt)
- [Spain](https://apptail.io/app/thetacalc-doAc/spain)
- [Finland](https://apptail.io/app/thetacalc-doAc/finland)
- [France](https://apptail.io/app/thetacalc-doAc/france)
- [Greece](https://apptail.io/app/thetacalc-doAc/greece)
- [Hong Kong SAR China](https://apptail.io/app/thetacalc-doAc/hong-kong)
- [Hungary](https://apptail.io/app/thetacalc-doAc/hungary)
- [Indonesia](https://apptail.io/app/thetacalc-doAc/indonesia)
- [Ireland](https://apptail.io/app/thetacalc-doAc/ireland)
- [Israel](https://apptail.io/app/thetacalc-doAc/israel)
- [India](https://apptail.io/app/thetacalc-doAc/india)
- [Iceland](https://apptail.io/app/thetacalc-doAc/iceland)
- [Italy](https://apptail.io/app/thetacalc-doAc/italy)
- [Japan](https://apptail.io/app/thetacalc-doAc/japan)
- [South Korea](https://apptail.io/app/thetacalc-doAc/south-korea)
- [Kuwait](https://apptail.io/app/thetacalc-doAc/kuwait)
- [Kazakhstan](https://apptail.io/app/thetacalc-doAc/kazakhstan)
- [Lebanon](https://apptail.io/app/thetacalc-doAc/lebanon)
- [Sri Lanka](https://apptail.io/app/thetacalc-doAc/sri-lanka)
- [Lithuania](https://apptail.io/app/thetacalc-doAc/lithuania)
- [Latvia](https://apptail.io/app/thetacalc-doAc/latvia)
- [Madagascar](https://apptail.io/app/thetacalc-doAc/madagascar)
- [North Macedonia](https://apptail.io/app/thetacalc-doAc/north-macedonia)
- [Malaysia](https://apptail.io/app/thetacalc-doAc/malaysia)
- [Nigeria](https://apptail.io/app/thetacalc-doAc/nigeria)
- [Netherlands](https://apptail.io/app/thetacalc-doAc/netherlands)
- [Norway](https://apptail.io/app/thetacalc-doAc/norway)
- [Nepal](https://apptail.io/app/thetacalc-doAc/nepal)
- [New Zealand](https://apptail.io/app/thetacalc-doAc/new-zealand)
- [Peru](https://apptail.io/app/thetacalc-doAc/peru)
- [Philippines](https://apptail.io/app/thetacalc-doAc/philippines)
- [Pakistan](https://apptail.io/app/thetacalc-doAc/pakistan)
- [Poland](https://apptail.io/app/thetacalc-doAc/poland)
- [Portugal](https://apptail.io/app/thetacalc-doAc/portugal)
- [Romania](https://apptail.io/app/thetacalc-doAc/romania)
- [Russia](https://apptail.io/app/thetacalc-doAc/russia)
- [Saudi Arabia](https://apptail.io/app/thetacalc-doAc/saudi-arabia)
- [Singapore](https://apptail.io/app/thetacalc-doAc/singapore)
- [Slovenia](https://apptail.io/app/thetacalc-doAc/slovenia)
- [Thailand](https://apptail.io/app/thetacalc-doAc/thailand)
- [Türkiye](https://apptail.io/app/thetacalc-doAc/turkey)
- [Taiwan](https://apptail.io/app/thetacalc-doAc/taiwan)
- [Ukraine](https://apptail.io/app/thetacalc-doAc/ukraine)
- [Vietnam](https://apptail.io/app/thetacalc-doAc/vietnam)
- [United Arab Emirates](https://apptail.io/app/thetacalc-doAc/united-arab-emirates)
- [South Africa](https://apptail.io/app/thetacalc-doAc/south-africa)
- [Armenia](https://apptail.io/app/thetacalc-doAc/armenia)
- [Argentina](https://apptail.io/app/thetacalc-doAc/argentina)
- [Austria](https://apptail.io/app/thetacalc-doAc/austria)
- [Azerbaijan](https://apptail.io/app/thetacalc-doAc/azerbaijan)
- [Belgium](https://apptail.io/app/thetacalc-doAc/belgium)
- [Brunei](https://apptail.io/app/thetacalc-doAc/brunei)

---

## About AppTail

[AppTail](https://apptail.io) is a mobile app intelligence platform providing app analytics, ASO (App Store Optimization) tools, keyword tracking, competitor analysis, revenue estimates, and review monitoring for iOS App Store apps. Track your app's performance, discover ranking keywords, monitor competitors, and analyze market trends.

- [Search Apps](https://apptail.io)
- [Top Charts](https://apptail.io/top-iphone-apps)
- [Sign Up for Full Access](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=footer)

*Data provided by [AppTail](https://apptail.io) - Mobile App Intelligence Platform*