# SlipStick vs Kenbak

The clearest difference is price: Kenbak at Free against SlipStick's $0.99. SlipStick's advantage is update cadence (weekly vs monthly) and device support (3 vs 1). On ads and in-app purchases there is nothing between them.

Kenbak 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, Kenbak monthly. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | SlipStick | Kenbak |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| 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** | Monthly |
| Monetization | Paid | — |
| Size | 1 MB | 26 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Steve Glenner](https://appshunter.io/developer/1518671062) | [Takhir Zakirov](https://appshunter.io/developer/1717448184) |

## 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


### Kenbak

[App page](https://appshunter.io/ios/app/kenbak-1/id6744865263)

**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 Kenbak free?

Kenbak is free to download, with no in-app purchases.

### Do SlipStick or Kenbak have ads?

Neither SlipStick nor Kenbak shows ads.

### Which is updated more often, SlipStick or Kenbak?

SlipStick ships an update weekly, and Kenbak monthly. Most recently, SlipStick was updated on November 3, 2026 and Kenbak on November 5, 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.*