# Logarithm Rules Calculator vs Calcu

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

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

Logarithm Rules Calculator ships an update every 3 weeks, Calcu every 3 days. The most recent releases landed on August 17, 2026 and June 8, 2026 respectively.

## The numbers

| Metric | Logarithm Rules Calculator | Calcu |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/calcu-logarithm/id6698852208/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Monetization | — | Free |
| Size | 182 MB | 3 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) | [Yuri Morozov](https://appshunter.io/developer/1582368813) |

## 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 |


### 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 Logarithm Rules Calculator free?

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

### Is Calcu free?

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

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

Neither Logarithm Rules Calculator nor Calcu shows ads.

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

Logarithm Rules Calculator ships an update every 3 weeks, and Calcu every 3 days. Most recently, Logarithm Rules Calculator was updated on August 17, 2026 and Calcu on June 8, 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.*