# 無機化学 vs Vulpe

The clearest difference is rating: 無機化学 at 5.0 against Vulpe's 4.3. 無機化学 also leads on in-app purchases (none vs 4) and ads (none vs shown). On price, review sentiment, ratings volume and device support there is nothing between them.

Both are free to download. Vulpe sells 4 in-app purchases, starting at $3.99 per month. 無機化学 asks for nothing beyond the download.

無機化学 holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 2 and 4 respectively. Written reviews point the same way: 98% of 無機化学's written reviews are positive against 95% of Vulpe's.

無機化学 ships an update every 3 days, Vulpe every 2 weeks. Both last shipped on November 12, 2026.

## The numbers

| Metric | 無機化学 | Vulpe |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/id1351078183/reviews)** | [4.3 (4 ratings)](https://appshunter.io/ios/app/vulpe-study-with-a-plan/id6443739008/reviews) |
| Number of ratings | 2 | **4** |
| Positive reviews | **98.1% of reviews** | 95.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 days** | Every 2 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 42 MB | 187 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hideki Touhara](https://appshunter.io/developer/1268738829) | [UniLink Inc.](https://appshunter.io/developer/1100530980) |

## 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


### Vulpe

[App page](https://appshunter.io/ios/app/vulpe-study-with-a-plan/id6443739008)

This app helps you manage your reading goals by breaking down large books into daily page targets. It visualizes your progress, alerting you if you're ahead or behind schedule. Log your daily study sessions to stay on track and achieve your academic objectives.

**Highlights:** Set book completion dates, Calculate daily page goals, Log daily study progress, Visualize progress ahead/behind schedule, Receive progress notifications, Archive completed goals

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Vulpe Premium Monthly | $3.99 | per month |
| Vulpe Premium Annual | $12.99 | per year |
| Vulpe Premium Yearly | $39.99 | per year |
| Vulpe Premium Outright | $29.99 | one-time |


## Frequently asked questions

### Is 無機化学 free?

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

### Is Vulpe free?

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

### Which has better reviews, 無機化学 or Vulpe?

無機化学 is rated higher. 無機化学 averages 5.0 out of 5 from 2 ratings, while Vulpe averages 4.3 from 4 ratings.

### Do 無機化学 or Vulpe have ads?

Vulpe shows ads; 無機化学 does not.

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

無機化学 ships an update every 3 days, and Vulpe every 2 weeks. Most recently, 無機化学 was updated on November 12, 2026 and Vulpe on November 12, 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.*