# Logarithm Rules Calculator vs microbitIR

The clearest difference is in-app purchases: microbitIR at none against Logarithm Rules Calculator's 8. Logarithm Rules Calculator's advantage is update cadence (every 3 weeks vs every 6 weeks) and iOS requirement (15.0 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. Logarithm Rules Calculator sells 8 one-off in-app purchases. microbitIR asks for nothing beyond the download.

Logarithm Rules Calculator ships an update every 3 weeks, microbitIR every 6 weeks. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Logarithm Rules Calculator | microbitIR |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 weeks |
| Size | 182 MB | 4 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) | [Atsushi Yamada](https://appshunter.io/developer/301497489) |

## What reviewers say

### Logarithm Rules Calculator

[App page](https://appshunter.io/ios/app/logarithm-rules-calculator/id1662899656)

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| +30 User Tokens | $0.29 | one-time |
| +1 Convenience Token / 6h, max. +2 | $0.59 | one-time |
| +2 Convenience Tokens / 6h, max. +4 | $0.99 | one-time |
| +150 User Tokens | $0.99 | one-time |
| +300 User Tokens | $1.49 | one-time |
| +4 Convenience Tokens / 6h, max. +8 | $1.59 | one-time |
| Remove Ads | $1.99 | one-time |
| Lifetime Access | $1.99 | one-time |


### microbitIR

[App page](https://appshunter.io/ios/app/microbitir/id6443525690)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Logarithm Rules Calculator free?

Logarithm Rules Calculator is free to download, with in-app purchases available.

### Is microbitIR free?

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

### Do Logarithm Rules Calculator or microbitIR have ads?

Neither Logarithm Rules Calculator nor microbitIR shows ads.

### Which is updated more often, Logarithm Rules Calculator or microbitIR?

Logarithm Rules Calculator ships an update every 3 weeks, and microbitIR every 6 weeks. Most recently, Logarithm Rules Calculator was updated on October 24, 2026 and microbitIR on October 27, 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.*