# SlipStick vs Calcu

The clearest difference is price: Calcu at Free against SlipStick's $0.99. Calcu also leads on rating (5.0 vs 4.6) and update cadence (every 3 days vs weekly). SlipStick's advantage is ratings volume (9 vs 1) and iOS requirement (12.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

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

Calcu holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: SlipStick has 9 ratings behind it against 1, so its average is the more settled of the two.

SlipStick ships an update weekly, Calcu every 3 days. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | SlipStick | Calcu |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [4.6 (9 ratings)](https://appshunter.io/ios/app/slipstick/id1523544516/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/calcu-logarithm/id6698852208/reviews)** |
| Number of ratings | **9** | 1 |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | **Every 3 days** |
| Monetization | Paid | **Free** |
| Size | 1 MB | 3 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Steve Glenner](https://appshunter.io/developer/1518671062) | [Yuri Morozov](https://appshunter.io/developer/1582368813) |

## 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


### Calcu

[App page](https://appshunter.io/ios/app/calcu-logarithm/id6698852208)

This app provides advanced logarithmic calculations and explanations, covering equation solving, Taylor series, digit-by-digit computation, and integral definitions. It also simplifies expressions, solves complex logarithmic equations, and includes a virtual slide rule.

**Highlights:** Solves logarithmic equations for y, x, and a, Explains Taylor series for log_e(x), Illustrates digit-by-digit log_10(x) computation, Explains log_e definition via integrals, Simplifies logarithmic expressions, Calculates and graphs complex logarithms, Includes virtual slide rule

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SlipStick free?

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

### Is Calcu free?

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

### Which has better reviews, SlipStick or Calcu?

Calcu is rated higher. SlipStick averages 4.6 out of 5 from 9 ratings, while Calcu averages 5.0 from 1 ratings.

### Do SlipStick or Calcu have ads?

Neither SlipStick nor Calcu shows ads.

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

SlipStick ships an update weekly, and Calcu every 3 days. Most recently, SlipStick was updated on October 30, 2026 and Calcu on October 24, 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.*