# 学校行事 vs Simple Logarithm PRO

The clearest difference is price: 学校行事 at Free against Simple Logarithm PRO's $1.99. Simple Logarithm PRO's advantage is update cadence (monthly vs every 28 months) and iOS requirement (15.0 vs 26.0). On ads, in-app purchases and device support there is nothing between them.

学校行事 is free to download; Simple Logarithm PRO costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

学校行事 ships an update every 28 months, Simple Logarithm PRO monthly. Both last shipped on November 3, 2026.

## The numbers

| Metric | 学校行事 | Simple Logarithm PRO |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 28 months | **Monthly** |
| Monetization | — | Paid |
| Size | 3 MB | 180 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Satoshi Sato](https://appshunter.io/developer/1043844101) | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) |

## What reviewers say

### 学校行事

[App page](https://appshunter.io/ios/app/id1591800289)

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

**In-app purchases:** none


### Simple Logarithm PRO

[App page](https://appshunter.io/ios/app/simple-logarithm-pro/id1662897702)

This app simplifies complex logarithm and exponentiation calculations with step-by-step solutions. It supports various input types, including decimals, fractions, and negative values, and provides a history of all calculations.

**Highlights:** Logarithm and exponentiation modes, Step-by-step solution display, Support for decimals, fractions, and negative values, Calculation history, Transformation between logarithm and exponentiation, Logarithm rules infographic, Solution sharing

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

**In-app purchases:** none


## Frequently asked questions

### Is 学校行事 free?

学校行事 is free to download, with no in-app purchases.

### Is Simple Logarithm PRO free?

Simple Logarithm PRO costs $1.99, with no in-app purchases.

### Do 学校行事 or Simple Logarithm PRO have ads?

Neither 学校行事 nor Simple Logarithm PRO shows ads.

### Which is updated more often, 学校行事 or Simple Logarithm PRO?

学校行事 ships an update every 28 months, and Simple Logarithm PRO monthly. Most recently, 学校行事 was updated on November 3, 2026 and Simple Logarithm PRO on November 3, 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.*