# Slide Rule vs Time Keeper with Progress

The clearest difference is price: Time Keeper with Progress at Free against Slide Rule's $0.99. On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Time Keeper with Progress is free to download; Slide Rule costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Slide Rule | Time Keeper with Progress |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/slide-rule/id288454455/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 29 months | — |
| Monetization | Paid | — |
| Size | 3 MB | 0 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Masayuki Akamatsu](https://appshunter.io/developer/284722836) | [Ken Mayumi](https://appshunter.io/developer/1488297052) |

## What reviewers say

### Slide Rule

[App page](https://appshunter.io/ios/app/slide-rule/id288454455)

Simulates a mechanical analog computer for scientific and engineering calculations. Perform multiplication, division, roots, and trigonometric functions with a digital slide rule.

**Highlights:** Multiplication and division, Square and cube roots, Trigonometry functions, Logarithm calculations, Digital slide rule simulation, Mechanical analog computer

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

**In-app purchases:** none


### Time Keeper with Progress

[App page](https://appshunter.io/ios/app/time-keeper-with-progress/id6670522060)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Slide Rule free?

Slide Rule costs $0.99, with no in-app purchases.

### Is Time Keeper with Progress free?

Time Keeper with Progress is free to download, with no in-app purchases.

### Do Slide Rule or Time Keeper with Progress have ads?

Neither Slide Rule nor Time Keeper with Progress shows ads.

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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.*