# SlipStick vs Learn Fortran Programming

The clearest difference is update cadence: SlipStick at weekly against Learn Fortran Programming's every 15 months. SlipStick also leads on price ($0.99 vs $1.99). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

SlipStick costs $0.99 and Learn Fortran Programming $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SlipStick ships an update weekly, Learn Fortran Programming every 15 months. The most recent releases landed on October 17, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | SlipStick | Learn Fortran Programming |
| --- | --- | --- |
| Price | **$0.99** | $1.99 |
| Rating | **[4.6 (9 ratings)](https://appshunter.io/ios/app/slipstick/id1523544516/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 15 months |
| Monetization | Paid | — |
| Size | 1 MB | 34 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Steve Glenner](https://appshunter.io/developer/1518671062) | [Saqib Masood](https://appshunter.io/developer/1555852546) |

## What reviewers say

### SlipStick

[App page](https://appshunter.io/ios/app/slipstick/id1523544516)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Learn Fortran Programming

[App page](https://appshunter.io/ios/app/learn-fortran-programming/id6446048232)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is SlipStick free?

SlipStick costs $0.99, with no in-app purchases.

### Is Learn Fortran Programming free?

Learn Fortran Programming costs $1.99, with no in-app purchases.

### Do SlipStick or Learn Fortran Programming have ads?

Neither SlipStick nor Learn Fortran Programming shows ads.

### Which is updated more often, SlipStick or Learn Fortran Programming?

SlipStick ships an update weekly, and Learn Fortran Programming every 15 months. Most recently, SlipStick was updated on October 17, 2026 and Learn Fortran Programming on October 12, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*