# CoStudy vs DEApp

The clearest difference is ads: DEApp at none against CoStudy's shown. DEApp also leads on update cadence (every 5 days vs every 3 weeks). CoStudy's advantage is review sentiment (93% vs 62%) and rating (4.8 vs 4.5). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. CoStudy sells 13 in-app purchases, starting at $3.99 per month and DEApp sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

CoStudy holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: CoStudy has 71 ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 93% of CoStudy's written reviews are positive against 62% of DEApp's.

CoStudy ships an update every 3 weeks, DEApp every 5 days. The most recent releases landed on October 14, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | CoStudy | DEApp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (71 ratings)](https://appshunter.io/ios/app/costudy/id1617091849/reviews)** | [4.5 (8 ratings)](https://appshunter.io/ios/app/deapp/id6459658940/reviews) |
| Number of ratings | **71** | 8 |
| Positive reviews | **92.8% of reviews** | 62.1% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 5 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 384 MB | 7 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Co-study Information Technology (Shanghai) Co., Ltd](https://appshunter.io/developer/1489845277) | [UnCheon Baek](https://appshunter.io/developer/1143037815) |

## What reviewers say

### CoStudy

[App page](https://appshunter.io/ios/app/costudy/id1617091849)

This app creates a virtual study environment to combat the loneliness of solo learning. It simulates a campus with different buildings and allows users to find study partners and friends to study with, fostering a sense of community and accountability.

**Highlights:** Virtual campus with different buildings, Find study partners based on goals/region, Study with friends as virtual desk mates, Strict focus mode with rules, Earn rewards for focused study sessions, Positive reinforcement for self-discipline

**Features:** Vision Pro support

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Co岛会员-连续包月 | $3.99 | per month |
| 购买10个Co钻 | $0.99 | one-time |
| 购买60个Co钻 | $0.99 | one-time |
| Co岛会员-1个月 | $1.99 | one-time |
| 购买180个Co钻 | $2.99 | one-time |
| 购买300个Co钻 | $3.99 | one-time |
| 购买450个Co钻 | $5.99 | one-time |
| 购买680个Co钻 | $9.99 | one-time |
| 购买1280个Co钻 | $19.99 | one-time |
| Co岛会员-12个月 | $24.99 | one-time |
| Co岛会员-12个月 | $29.99 | one-time |
| 购买1980个Co钻 | $29.99 | one-time |
| 购买3280个Co钻 | $49.99 | one-time |

**What reviewers like**

- 🎮 Cute and visually appealing interface design
- 🎯 Effective focus and concentration enhancement
- 👥 Social learning features with friends and study groups
- 💰 Gamification through virtual currency and clothing rewards
- 🏫 Virtual study room with other users for motivation

**What reviewers complain about**

- 🌍 No English language support despite international user base
- 💸 Increasing monetization of previously free cosmetics
- 📱 Phone verification issues for international users
- 🔗 Inconsistent server connectivity for overseas users
- ⚠️ Occasional app crashes and technical glitches

**Reported bugs**

- App crashes and sudden crashes when opening
- Server connection errors for international users
- Phone verification codes not being sent to international numbers
- Study sessions interrupted by incoming call notifications
- Unable to change language settings despite English tag in app store

**Requested features**

- English language version for international users
- iOS whitelist integration with Screen Time
- Widget functionality for daily/monthly check-in tracking
- Voice chat feature in study rooms
- More affordable cosmetic options purchasable with earned currency


### DEApp

[App page](https://appshunter.io/ios/app/deapp/id6459658940)

This app helps users break smartphone addiction and boost productivity by locking selected applications. Set schedules or timers for app usage, with features to prevent deletion or installation of new apps during lock periods.

**Highlights:** Scheduled app locking, Timer-based app locking, Deletion prevention, Installation prevention, Customizable lock schedules

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Apps | $0.99 | one-time |


## Frequently asked questions

### Is CoStudy free?

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

### Is DEApp free?

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

### Which has better reviews, CoStudy or DEApp?

CoStudy is rated higher. CoStudy averages 4.8 out of 5 from 71 ratings, while DEApp averages 4.5 from 8 ratings.

### Do CoStudy or DEApp have ads?

CoStudy shows ads; DEApp does not.

### Which is updated more often, CoStudy or DEApp?

CoStudy ships an update every 3 weeks, and DEApp every 5 days. Most recently, CoStudy was updated on October 14, 2026 and DEApp on October 15, 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.*