# HSV Book vs Odyssey App

The clearest difference is review sentiment: Odyssey App at 67% against HSV Book's 0%. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

HSV Book ships an update every 3 months, Odyssey App every 6 weeks. The most recent releases landed on September 21, 2026 and August 20, 2026 respectively.

## The numbers

| Metric | HSV Book | Odyssey App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/odyssey-app/id1450231978/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 0.0% of reviews | **66.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 105 MB | 124 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Polyfield Property Limited](https://appshunter.io/developer/1339606201) | [Odyssey Knebworth Limited](https://appshunter.io/developer/1450231977) |

## What reviewers say

### HSV Book

[App page](https://appshunter.io/ios/app/hsv-book/id1236725374)

Easily book fitness classes, view timetables, and get real-time updates on news and offers. Manage your bookings, explore membership options, and stay informed about your favorite facility.

**Highlights:** Fitness class timetables, Class booking and management, Public swim timetables, Centre information and news, Push notifications for updates, Membership viewing and online joining, HealthKit integration for activity data

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

**In-app purchases:** none


### Odyssey App

[App page](https://appshunter.io/ios/app/odyssey-app/id1450231978)

Manage your fitness club activities, book classes, and stay updated with the latest health news. Access timetables, offers, and contact information easily. Integrates with HealthKit to track activity and encourage fitness.

**Highlights:** Book fitness classes, View class timetables, Receive news and offers, Integrates with HealthKit, Contact club information, Push notifications

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

**In-app purchases:** none


## Frequently asked questions

### Is HSV Book free?

HSV Book is free to download, with no in-app purchases.

### Is Odyssey App free?

Odyssey App is free to download, with no in-app purchases.

### Do HSV Book or Odyssey App have ads?

Neither HSV Book nor Odyssey App shows ads.

### Which is updated more often, HSV Book or Odyssey App?

HSV Book ships an update every 3 months, and Odyssey App every 6 weeks. Most recently, HSV Book was updated on September 21, 2026 and Odyssey App on August 20, 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.*