# SBX vs boulder.

The clearest difference is ads: SBX at none against boulder.'s shown. boulder.'s advantage is update cadence (fortnightly vs every 13 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

SBX ships an update every 13 months, boulder. fortnightly. The most recent releases landed on October 13, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | SBX | boulder. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/sbx/id1450946790/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 13 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 31 MB | 128 MB |
| Requires iOS | 15.6 | **14.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [StrongBox](https://appshunter.io/developer/1450946789) | [Boulder Gym Center](https://appshunter.io/developer/1813848382) |

## What reviewers say

### SBX

[App page](https://appshunter.io/ios/app/sbx/id1450946790)

Easily book fitness classes, manage your membership, and stay updated on the latest offerings. Make reservations, join waitlists, and purchase class packages directly from your device.

**Highlights:** Book fitness classes, Manage membership status, Purchase class packages, Join waitlists, View profile, Stay updated on products/services

**Features:** macOS Compatibility

**In-app purchases:** none


### boulder.

[App page](https://appshunter.io/ios/app/boulder/id6745784260)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is SBX free?

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

### Is boulder. free?

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

### Do SBX or boulder. have ads?

boulder. shows ads; SBX does not.

### Which is updated more often, SBX or boulder.?

SBX ships an update every 13 months, and boulder. fortnightly. Most recently, SBX was updated on October 13, 2026 and boulder. on September 30, 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.*