# CoStudy vs Tendback

The clearest difference is ads: Tendback at none against CoStudy's shown. CoStudy's advantage is iOS requirement (13.0 vs 17.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. CoStudy sells 10 in-app purchases, starting at $3.99 per month and Tendback sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

CoStudy ships an update every 3 weeks, Tendback every 5 weeks. The most recent releases landed on November 7, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | CoStudy | Tendback |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (72 ratings)](https://appshunter.io/ios/app/costudy/id1617091849/reviews)** | — |
| Number of ratings | **72** | — |
| Positive reviews | 92.9% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 5 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 385 MB | 5 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Co-study Information Technology (Shanghai) Co., Ltd](https://appshunter.io/developer/1489845277) | [孟奇 李](https://appshunter.io/developer/1895201807) |

## 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 offers gamified features like virtual currency and customizable avatars, alongside strict focus timers and social study groups to enhance discipline and motivation.

**Highlights:** Virtual campus with themed buildings, Find study partners based on goals, Study with friends as virtual desk mates, Strict focus timers with rewards, Gamified currency for self-discipline, Customizable avatars and personal space

**Features:** Vision Pro support

**In-app purchases (10)**

| 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 |
| 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 |
| 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


### Tendback

[App page](https://appshunter.io/ios/app/tendback/id6782829023)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tendback Pro Monthly | $0.99 | per month |
| Tendback Pro Yearly | $4.99 | per year |
| Tendback Pro Lifetime | $12.99 | one-time |


## Frequently asked questions

### Is CoStudy free?

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

### Is Tendback free?

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

### Do CoStudy or Tendback have ads?

CoStudy shows ads; Tendback does not.

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

CoStudy ships an update every 3 weeks, and Tendback every 5 weeks. Most recently, CoStudy was updated on November 7, 2026 and Tendback on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*