ThetaCalc vs BVCalc
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.
BVCalc
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Calculate with confidence. BVCalc combines live-updating algebraic entry with an RPN stack that shows the full expression behind every value. Reuse past work with a tap, switch modes anytime, and audit every step. Why BVCalc • Live result as you type, so no need for a “=” key • Reuse expressions, not just values • Shared tape/stack with readable infix history • Switch between Algebraic ↔ RPN mid-calculation • Touch-friendly stack gestures (tap to swap/roll) • Basic & Scientific keyboards + external keyboard support • Long-press to edit any past step; copy/paste everywhere • Color-coded parentheses, themes, high-contrast mode • Memory for reusable snippets • No ads BVCalc makes partial-step workflows fast and reliable: what you see is the math you actually entered.
Screenshots
Verdict
The clearest difference is price: ThetaCalc at Free against BVCalc's $4.99. BVCalc's advantage is update cadence (every 5 weeks vs every 3 months). On ads, in-app purchases, device support and iOS requirement 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
ThetaCalc is free to download; BVCalc costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
ThetaCalc ships an update every 3 months, BVCalc every 5 weeks. The most recent releases landed on October 1, 2026 and October 7, 2026 respectively.
| Parameter | ThetaCalc | BVCalc |
|---|---|---|
| Price | Free — better | $4.99 |
| Rating | 4.3 (4 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 3 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 — better | 18.6 |
| Further details — not scored | ||
| Size | 1 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Felix Stehli | Brian Kenneth Vogel |
In-app purchases
ThetaCalc
No in-app purchases
BVCalc
No in-app purchases
