ThetaCalc vs PyCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ThetaCalc
This utility app provides a Reverse Polish Notation (RPN) calculator. Users can extend its functionality by programming custom functions and equations using JavaScript.
- Reverse Polish Notation (RPN) calculator
- User-programmable functions
- JavaScript equation support
- Extensible functionality
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ThetaCalc is a RPN (Reverse Polish Notation) calculator which can be extended by functions and equations programmed by the user in JavaScript.
PyCalc
This app offers a revolutionary approach to mobile calculations, allowing users to view and edit entire equations at once. It leverages the power of Python 3.11.1 for advanced functions, symbolic math, and financial analysis, making complex computations accessible on the go.
- Real-time editable calculation view
- Python 3.11.1 interpreter
- Programmable scientific calculator
- Support for matrices and fractions
- Built-in Python packages (math, sympy)
- Financial analysis functions
- Symbolic math capabilities
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What most people love first about PyCalc is that they can see and edit their entire calculation all at once. It's a simple idea but it makes a huge difference in the kinds of calculations people end up doing on mobile. But that just scratches the surface of PyCalc's features and capabilities. The more you learn, the more you'll see how easy it is to do calculations that were always too hard before on mobile. Jump in and learn a truly better way of calculating. Basic features: ● A new and better approach to mobile calculation ● A cleaner interface for complicated calculations than traditional calculators ● Calculate by voice ● A history list keeps track of your previous calculations ● Functions built in for a huge range of applications ● Multiple keyboards optimized for different use cases Advanced features: ● Based on the Python® language, with access to the power of a full Python 3.11.1 interpreter ● Programmable scientific calculator: An editable startup.py script allows you to define your own functions for easy access later ● Streamlined support for matrices and fractions ● Many standard Python packages, such as: math, statistics, random, sympy, mpmath, fractions, decimal and datetime ● Basic financial analysis functions: pv(), fv(), npv(), pmt(), etc. ● Built-in support for complex numbers ● Symbolic math via the sympy package ● http/https queries via requests package ● Much, much more... "Python" and the Python Logo are trademarks or registered trademarks of the Python Software Foundation, used by the PyCalc project with permission from the Foundation.
Screenshots
Verdict
The clearest difference is rating: PyCalc at 5.0 against ThetaCalc's 4.3. PyCalc also leads on update cadence (every 2 weeks vs every 3 months) and ratings volume (15 vs 4). On price, review sentiment, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
PyCalc holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 4 and 15 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
ThetaCalc ships an update every 3 months, PyCalc every 2 weeks. The most recent releases landed on June 1, 2026 and September 20, 2026 respectively.
| Parameter | ThetaCalc | PyCalc |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (4 ratings) | 5.0 (15 ratings) — better |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 4 | 15 — better |
| Update frequency | Every 3 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 — better | 18.0 |
| Further details — not scored | ||
| Size | 1 MB | 120 MB |
| Age rating | 4+ | 4+ |
| Developer | Felix Stehli | Youreka Tech, LLC |
Customer experience
ThetaCalc
PyCalc
In-app purchases
ThetaCalc
No in-app purchases
PyCalc
No in-app purchases









