# Session vs Book

The clearest difference is update cadence: Book at every 3 days against Session's every 3 months. Book also leads on device support (3 vs 1) and iOS requirement (13.0 vs 16.4). On price, 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.

Session ships an update every 3 months, Book every 3 days. The most recent releases landed on August 27, 2026 and March 3, 2026 respectively.

## The numbers

| Metric | Session | Book |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (28 ratings)](https://appshunter.io/ios/app/session-booking/id1571588734/reviews)** | — |
| Number of ratings | **28** | — |
| Positive reviews | 78.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 days** |
| Monetization | Free | — |
| Size | 88 MB | 38 MB |
| Requires iOS | 16.4 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Session Technologies, LLC](https://appshunter.io/developer/1571588976) | [Marlenus, LLC](https://appshunter.io/developer/1780343114) |

## What reviewers say

### Session

[App page](https://appshunter.io/ios/app/session-booking/id1571588734)

Manage your photography sessions, bookings, and schedule directly from your mobile device. This app requires an existing Session account to access your information.

**Highlights:** View session details, Manage bookings, Access calendar on the go, Requires Session account

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

**In-app purchases:** none


### Book

[App page](https://appshunter.io/ios/app/book/id6738625204)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Session free?

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

### Is Book free?

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

### Do Session or Book have ads?

Neither Session nor Book shows ads.

### Which is updated more often, Session or Book?

Session ships an update every 3 months, and Book every 3 days. Most recently, Session was updated on August 27, 2026 and Book on March 3, 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.*