Comparison

SlipStick vs pocketFORTH

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Virtual slide rule reproduction
  • Multiplication and division
  • Logarithm calculations
  • Trigonometry calculations
  • Classic engineering tool
Features
Read full description

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.

About

pocketFORTH

Features
Read full description

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

SlipStick4 screens
pocketFORTH4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

pocketFORTH is free to download; SlipStick costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

SlipStick ships an update weekly, pocketFORTH every 3 weeks. The most recent releases landed on November 3, 2026 and November 10, 2026 respectively.

Scorecard3 real differences · 7 level
SlipStick versus pocketFORTH: the parameters behind the verdict, then further details
ParameterSlipStickpocketFORTH
Price$0.99Free — better
Rating4.6 (9 ratings) — better—
Positive reviews83.3% of reviews—
Number of ratings9 — better—
Update frequencyWeekly — betterEvery 3 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.6
Further details — not scored
Size1 MB1 MB
Age rating4+4+
DeveloperSteve GlennerLeonardo Del Nonno

In-app purchases

None

SlipStick

No in-app purchases

None

pocketFORTH

No in-app purchases

Questions

Is SlipStick free?
SlipStick costs $0.99, with no in-app purchases.
Is pocketFORTH free?
pocketFORTH is free to download, with no in-app purchases.
Do SlipStick or pocketFORTH have ads?
Neither SlipStick nor pocketFORTH shows ads.
Which is updated more often, SlipStick or pocketFORTH?
SlipStick ships an update weekly, and pocketFORTH every 3 weeks. Most recently, SlipStick was updated on November 3, 2026 and pocketFORTH on November 10, 2026.

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