# Zone ZHF vs fast_burn

The clearest difference is in-app purchases: Zone ZHF at none against fast_burn's 2. Zone ZHF also leads on device support (3 vs 1) and iOS requirement (14.0 vs 17.0). fast_burn's advantage is update cadence (every 8 days vs every 3 weeks). On price and ads there is nothing between them.

Both are free to download. fast_burn sells 2 in-app purchases, starting at $4.99 per month. Zone ZHF asks for nothing beyond the download.

Zone ZHF ships an update every 3 weeks, fast_burn every 8 days. The most recent releases landed on October 24, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Zone ZHF | fast_burn |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (855 ratings)](https://appshunter.io/ios/app/zone-zhf/id1543116695/reviews)** | — |
| Number of ratings | **855** | — |
| Positive reviews | 78.6% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 8 days** |
| Monetization | Free | — |
| Size | 120 MB | 1 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Smart Health Clubs](https://appshunter.io/developer/1333435433) | [Keiichiro Hayashida](https://appshunter.io/developer/1622333497) |

## What reviewers say

### Zone ZHF

[App page](https://appshunter.io/ios/app/zone-zhf/id1543116695)

Monitor your fitness activities both inside and outside the gym. Access class schedules, social media, set fitness goals, and participate in club challenges. Seamlessly integrate with popular fitness trackers and apps, syncing your data with your iPhone's Health app.

**Highlights:** Workout tracking, Class schedules, Social media integration, Fitness goals, In-club challenges, Fitness device linking, Health app sync

**Features:** Apple Wallet, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Friendly and welcoming staff
- 💪 Excellent equipment variety and technology
- 🎯 Supportive personal trainers
- 🏋️ Great gym atmosphere and vibe
- 📱 Functional app for gym management

**What reviewers complain about**

- 🐛 Login and account authentication issues
- 🎨 Poor app UI/UX design
- 👥 Staff management concerns
- 💼 Low employee compensation

**Reported bugs**

- Login kicks out users despite valid account
- Account creation not functional in app
- Session authentication failures

**Requested features**

- Increase Silver Sneakers class availability and capacity
- Improve app account creation interface


### fast_burn

[App page](https://appshunter.io/ios/app/fast-burn/id6768056154)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FastBurn Pro (Monthly) | $4.99 | per month |
| FastBurn Pro (Annual) | $29.99 | per year |


## Frequently asked questions

### Is Zone ZHF free?

Zone ZHF is free to download, with no in-app purchases.

### Is fast_burn free?

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

### Do Zone ZHF or fast_burn have ads?

Neither Zone ZHF nor fast_burn shows ads.

### Which is updated more often, Zone ZHF or fast_burn?

Zone ZHF ships an update every 3 weeks, and fast_burn every 8 days. Most recently, Zone ZHF was updated on October 24, 2026 and fast_burn on October 6, 2026.

---

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