# Keep vs 352Air

The clearest difference is rating: Keep at 4.8 against 352Air's 1.9. Keep also leads on review sentiment (53% vs 25%) and ratings volume (17K vs 8). 352Air's advantage is in-app purchases (none vs 12) and ads (none vs shown). On price there is nothing between them.

Both are free to download. Keep sells 12 in-app purchases, starting at $2.99 per month. 352Air asks for nothing beyond the download.

Keep holds the better App Store score, 4.8 against 1.9. That said, the two scores are not equally well evidenced: Keep has 17K ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 53% of Keep's written reviews are positive against 25% of 352Air's.

Keep ships an update weekly, 352Air every 5 weeks. The most recent releases landed on October 15, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Keep | 352Air |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (17K ratings)](https://appshunter.io/ios/app/keep-ai/id952694580/reviews)** | [1.9 (8 ratings)](https://appshunter.io/ios/app/352air/id1086523490/reviews) |
| Number of ratings | **17K** | 8 |
| Positive reviews | **53.1% of reviews** | 25.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 5 weeks |
| Monetization | Freemium | **Free** |
| Size | 455 MB | 119 MB |
| Requires iOS | 14.0 | **12.2** |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Keep](https://appshunter.io/developer/952694579) | [Beijing 352 Environmental Technology Co .LTD.](https://appshunter.io/developer/1086523489) |

## What reviewers say

### Keep

[App page](https://appshunter.io/ios/app/keep-ai/id952694580)

This app uses AI to provide personalized workout plans and real-time coaching. It tracks various fitness data, offers diverse courses, and connects users with a community for motivation and shared experiences.

**Highlights:** AI-powered personalized workout plans, Real-time voice coaching for exercises, Food and exercise data tracking via photos, Comprehensive sports data platform, Diverse courses from professionals and influencers, Community features for motivation and challenges, Outdoor route exploration and group runs

**Features:** macOS Compatibility, Siri integration, Apple Watch app, iMessage stickers, Vision Pro support

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 连续包月会员 | $2.99 | per month |
| Keep VIP 自动订阅 1 个月 | $2.99 | per month |
| Keep 连续包月会员 | $2.99 | per month |
| 连续包月会员 | $2.99 | per month |
| 连续包季会员 | $7.99 | per 3 months |
| App 内购项目「90 K币」 | $0.99 | one-time |
| App 内购项目「80 K币」 | $1.19 | one-time |
| App 内购项目「300 K币」 | $3.99 | one-time |
| App 内购项目「250 K币」 | $3.99 | one-time |
| App 内购项目「500 K币」 | $7.09 | one-time |
| App 内购项目「680 K币」 | $9.99 | one-time |
| App 内购项目「780 K币」 | $10.95 | one-time |

**What reviewers like**

- 🚀 Love it
- 👍 Great app
- 👍 Excellent app
- 👍 Plenty of free courses
- 👍 Motivating community

**What reviewers complain about**

- 🐛 Crashes and freezes
- 🐛 Slow loading and connectivity issues
- 🐛 Inaccurate calorie/workout tracking
- 🐛 Buggy updates
- 🔒 Privacy concerns

**Reported bugs**

- Sudden app crashes
- Workout data not syncing
- Inability to complete body assessments
- GPS not working for running
- Forced location sharing

**Requested features**

- Add English language support
- Improve Apple Watch integration
- Allow offline workout downloads
- Customize workout playlists
- Expand exercise library


### 352Air

[App page](https://appshunter.io/ios/app/352air/id1086523490)

This app connects to smart air purifiers and monitors, providing remote control, real-time and historical data, and air quality forecasts. It also offers联动净化 between devices and outdoor air quality information for over 300 cities.

**Highlights:** Remote control of air purifiers, Real-time and historical air quality data, Outdoor air quality maps and forecasts, 联动净化 between devices, Device sharing, Firmware updates

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Keep free?

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

### Is 352Air free?

352Air is free to download, with no in-app purchases.

### Which has better reviews, Keep or 352Air?

Keep is rated higher. Keep averages 4.8 out of 5 from 17K ratings, while 352Air averages 1.9 from 8 ratings.

### Do Keep or 352Air have ads?

Keep shows ads; 352Air does not.

### Which is updated more often, Keep or 352Air?

Keep ships an update weekly, and 352Air every 5 weeks. Most recently, Keep was updated on October 15, 2026 and 352Air on September 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.*