Calx vs TimecodeRPN
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calx
This calculator app utilizes Reverse Polish Notation (RPN) for efficient calculations by manipulating numbers on a stack. It offers a guided tutorial, gestural interaction, multiple keypads with various functions, and customization options for fonts and colors.
- Reverse Polish Notation (RPN)
- Gestural interaction
- Multiple keypads (basic, scientific, statistical)
- Customizable fonts and colors
- Guided tutorial
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CALX is an RPN calculator — a calculator designed to work with a list of numbers. This means that instead of just typing an equation into your calculator, you push numbers onto a stack, and then apply operations to the lowermost numbers in the stack. It's bizarre, but it makes sense once it clicks. If this all sounds confusing, don't worry! CALX comes with a guided tutorial which will get you up to speed in three minutes. Features: • Gestural interaction: Manipulate your data with simple, intuitive gestures. • Multiple keypads: CALX features an array of basic, scientific, and statistical functions. • Customization: Select from different fonts and colours to find a combination that works for you.
TimecodeRPN
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This is a RPN timecode calculator styled after the HP calculators of old.
Screenshots
Verdict
The clearest difference is update cadence: TimecodeRPN at every 2 days against Calx's every 24 months. Calx's advantage is iOS requirement (12.0 vs 17.6). On price, ads, in-app purchases and device support 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
Calx costs $0.99 and TimecodeRPN $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Calx ships an update every 24 months, TimecodeRPN every 2 days. The most recent releases landed on August 12, 2026 and September 13, 2026 respectively.
| Parameter | Calx | TimecodeRPN |
|---|---|---|
| Price | $0.99 | $0.99 |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 24 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 12.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 4 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | Daniel Clelland | Denis Leconte |
In-app purchases
Calx
No in-app purchases
TimecodeRPN
No in-app purchases
