# Vulpe vs 大人のやる気ペン

The clearest difference is review sentiment: Vulpe at 95% against 大人のやる気ペン's 9%. Vulpe also leads on update cadence (every 2 weeks vs every 3 weeks). 大人のやる気ペン's advantage is ads (none vs shown). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Vulpe sells 4 in-app purchases, starting at $3.99 per month and 大人のやる気ペン sells 20 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Vulpe ships an update every 2 weeks, 大人のやる気ペン every 3 weeks. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Vulpe | 大人のやる気ペン |
| --- | --- | --- |
| 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 | **95.5% of reviews** | 9.3% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 187 MB | 984 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [UniLink Inc.](https://appshunter.io/developer/1100530980) | [KOKUYO CO., LTD.](https://appshunter.io/developer/1068141364) |

## 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 |


### 大人のやる気ペン

[App page](https://appshunter.io/ios/app/id6737018651)

**In-app purchases (20)**

| Purchase | Price | Billing |
| --- | --- | --- |
| リアル冬 | $1.99 | one-time |
| 宇宙 | $1.99 | one-time |
| 冬イラスト | $1.99 | one-time |
| 春イラスト | $1.99 | one-time |
| スタイリッシュな部屋 | $1.99 | one-time |
| 魔女の部屋 | $1.99 | one-time |
| 図書館 | $1.99 | one-time |
| 遊園地 | $1.99 | one-time |
| 人工衛星　グレー | $2.99 | one-time |
| 勇者の装備 金 | $2.99 | one-time |
| ニンジン 橙 | $2.99 | one-time |
| 勇者の冠 金 | $2.99 | one-time |
| 宇宙ヘルメット グレー | $2.99 | one-time |
| ウサギの耳 白 | $2.99 | one-time |
| 名誉のキズ 銀 | $2.99 | one-time |
| 宇宙服ポット 白 | $2.99 | one-time |
| セーターポット 白 | $2.99 | one-time |
| 勇者の鎧ポット グレー | $2.99 | one-time |
| サンタヒゲ 白 | $2.99 | one-time |
| 金のジョウロ×5 | $6.99 | one-time |


## Frequently asked questions

### Is Vulpe free?

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

### Is 大人のやる気ペン free?

大人のやる気ペン is free to download, with in-app purchases available.

### Do Vulpe or 大人のやる気ペン have ads?

Vulpe shows ads; 大人のやる気ペン does not.

### Which is updated more often, Vulpe or 大人のやる気ペン?

Vulpe ships an update every 2 weeks, and 大人のやる気ペン every 3 weeks. Most recently, Vulpe was updated on October 25, 2026 and 大人のやる気ペン on October 24, 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.*