---
title: "ThetaCalc - Reviews, Revenue and Downloads in Russia | 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 — Russia

![ThetaCalc App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/38/b6/3f/38b63fcc-92cd-9b47-9eee-cf678c4e4c65/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:** N/A (0 ratings)
**Price:** Free
**Bundle ID:** net.grayfrog.ThetaCalc
**Store:** Apple App Store
**Country:** Russia
**Version:** 1.9 (released 2025-09-16)
**Original Release:** 2020-07-06
**Languages:** English

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

## 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/PurpleSource221/v4/72/e4/09/72e409dd-2c47-5d96-f68c-b11e77f18bb8/a648f6c7-afeb-4ecf-b942-78bb67930889_Simulator_Screen_Shot_-_iPhone_8_Plus_-_2021-06-11_at_12.31.17.png/392x696bb.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/e9/55/cc/e955ccda-08d1-1908-834e-9aa9bddddb6a/9e55c3c9-1ba2-44f6-bab6-01c0e37abe80_Simulator_Screen_Shot_-_iPhone_8_Plus_-_2021-06-11_at_12.31.23.png/392x696bb.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/71/0c/a6/710ca6ca-a822-c1de-f92e-670d2c1fb3dc/b0c473b1-b9fa-4964-a23e-de8cea1b997e_Simulator_Screen_Shot_-_iPhone_8_Plus_-_2021-06-11_at_12.32.00.png/392x696bb.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/ea/51/bf/ea51bf29-2e76-90a1-c243-e55b97a3209f/c5945717-c822-4402-9155-f6c3450be60e_Simulator_Screen_Shot_-_iPhone_8_Plus_-_2021-06-11_at_12.32.11.png/392x696bb.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/42/3b/8f/423b8f6e-509d-a0a5-5209-98388fa5ee1b/71937a10-a310-4c31-accd-88405852f641_Simulator_Screen_Shot_-_iPhone_8_Plus_-_2021-06-11_at_12.32.55.png/392x696bb.png)
- [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/97/d4/27/97d4274b-e09a-5909-7d8f-028577b1a65a/83b0033a-c0bc-415c-aa89-01508ba43143_Simulator_Screen_Shot_-_iPhone_8_Plus_-_2021-06-11_at_12.33.08.png/392x696bb.png)
- [Screenshot 7](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/7e/f2/4d/7ef24d36-7f38-ba4e-255b-b9b2953b7701/a6d5c606-4a4a-46e4-933d-cd97f21a7030_Simulator_Screen_Shot_-_iPhone_8_Plus_-_2021-06-11_at_12.33.21.png/392x696bb.png)
- [Screenshot 8](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/6d/99/64/6d99646b-050f-69d6-366d-a078a6aeca35/8e8ee687-b5ec-439d-84c6-cec78b144f78_Simulator_Screen_Shot_-_iPhone_8_Plus_-_2021-06-11_at_12.34.09.png/392x696bb.png)







## 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)

---

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