# Vulpe vs 逆算勉強

The clearest difference is in-app purchases: 逆算勉強 at none against Vulpe's 4. 逆算勉強 also leads on ads (none vs shown) and update cadence (daily vs every 2 weeks). On price 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. 逆算勉強 asks for nothing beyond the download.

Vulpe ships an update every 2 weeks, 逆算勉強 daily. The most recent releases landed on October 16, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Vulpe | 逆算勉強 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (4 ratings)](https://appshunter.io/ios/app/vulpe-study-with-a-plan/id6443739008/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 95.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 188 MB | 51 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [UniLink Inc.](https://appshunter.io/developer/1100530980) | [Kodai Maki](https://appshunter.io/developer/1674346013) |

## What reviewers say

### 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 |


### 逆算勉強

[App page](https://appshunter.io/ios/app/id6445865041)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Vulpe free?

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

### Is 逆算勉強 free?

逆算勉強 is free to download, with no in-app purchases.

### Do Vulpe or 逆算勉強 have ads?

Vulpe shows ads; 逆算勉強 does not.

### Which is updated more often, Vulpe or 逆算勉強?

Vulpe ships an update every 2 weeks, and 逆算勉強 daily. Most recently, Vulpe was updated on October 16, 2026 and 逆算勉強 on September 28, 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.*