SlipStick vs pocketFORTH
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SlipStick
This app is a fully functional digital reproduction of a classic engineering slide rule. It allows users to perform complex calculations like multiplication, division, logarithms, and trigonometry, just like the original manual tool.
- Virtual slide rule reproduction
- Multiplication and division
- Logarithm calculations
- Trigonometry calculations
- Classic engineering tool
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A reproduction of a classic engineering tool - the slide rule. This fully functional manual calculating device was the engineer and math student's means of quickly solving multiplication, division, logarithm and trigonometry calculations until the invention and wide spread use of electronic calculators.
pocketFORTH
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Discover one of the programming languages that helped shape modern computing. PocketFORTH is a modern FORTH environment inspired by the golden age of pocket computers and home computing, bringing the power of interactive programming directly to your iPhone and iPad. Whether you're a retro-computing enthusiast, a student, an electronics maker or simply curious to explore one of the most influential programming languages ever created, Pocket FORTH lets you write, run, edit and save FORTH programs through a clean, fast and completely offline interface. Designed for both learning and experimentation, Pocket FORTH combines the simplicity of the original language with modern features including live editing, dictionary browsing, source inspection, QR code sharing, persistent storage and a growing collection of built-in words compatible with classic FORTH systems.
Screenshots
Verdict
The clearest difference is price: pocketFORTH at Free against SlipStick's $0.99. SlipStick's advantage is update cadence (weekly vs every 3 weeks) and iOS requirement (12.0 vs 15.6). On 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
pocketFORTH is free to download; SlipStick costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
SlipStick ships an update weekly, pocketFORTH every 3 weeks. The most recent releases landed on November 3, 2026 and November 10, 2026 respectively.
| Parameter | SlipStick | pocketFORTH |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.6 (9 ratings) — better | — |
| Positive reviews | 83.3% of reviews | — |
| Number of ratings | 9 — better | — |
| Update frequency | Weekly — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 1 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Steve Glenner | Leonardo Del Nonno |
In-app purchases
SlipStick
No in-app purchases
pocketFORTH
No in-app purchases









