# 無機化学 vs TitechApp 4

The clearest difference is in-app purchases: 無機化学 at none against TitechApp 4's 1. 無機化学 also leads on update cadence (every 2 days vs fortnightly) and review sentiment (98% vs 79%). On price, ads and device support there is nothing between them.

Both are free to download. TitechApp 4 sells 1 in-app purchase, starting at $0.99 per month. 無機化学 asks for nothing beyond the download.

無機化学 ships an update every 2 days, TitechApp 4 fortnightly. The most recent releases landed on November 2, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | 無機化学 | TitechApp 4 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/id1351078183/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | **98.1% of reviews** | 79.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Fortnightly |
| Monetization | — | Freemium |
| Size | 40 MB | 22 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Hideki Touhara](https://appshunter.io/developer/1268738829) | [MOTO MARUYAMA](https://appshunter.io/developer/1046345441) |

## What reviewers say

### 無機化学

[App page](https://appshunter.io/ios/app/id1351078183)

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

**In-app purchases:** none


### TitechApp 4

[App page](https://appshunter.io/ios/app/titechapp-4/id1400068981)

Enhance your Tokyo Tech experience with convenient access to lecture materials and automatic portal logins. This app streamlines your academic life, offering features designed specifically for Tokyo Tech students.

**Highlights:** Lecture Material Viewer, Auto login to Tokyo Tech Portal, Auto login to Tokyo Tech WiFi

**Features:** Vision Pro support, iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TitechApp Monthly Subscription | $0.99 | per month |


## Frequently asked questions

### Is 無機化学 free?

無機化学 is free to download, with no in-app purchases.

### Is TitechApp 4 free?

TitechApp 4 is free to download, with in-app purchases available.

### Do 無機化学 or TitechApp 4 have ads?

Neither 無機化学 nor TitechApp 4 shows ads.

### Which is updated more often, 無機化学 or TitechApp 4?

無機化学 ships an update every 2 days, and TitechApp 4 fortnightly. Most recently, 無機化学 was updated on November 2, 2026 and TitechApp 4 on October 29, 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.*