# SATS vs Boost System

The clearest difference is update cadence: SATS at fortnightly against Boost System's every 2 months. Boost System's advantage is iOS requirement (15.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

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

SATS ships an update fortnightly, Boost System every 2 months. The most recent releases landed on August 28, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | SATS | Boost System |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (245 ratings)](https://appshunter.io/ios/app/sats/id1272653109/reviews)** | — |
| Number of ratings | **245** | — |
| Positive reviews | 28.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Free | — |
| Size | 233 MB | 24 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HFN](https://appshunter.io/developer/1163778444) | [Cerum AS](https://appshunter.io/developer/879204595) |

## What reviewers say

### SATS

[App page](https://appshunter.io/ios/app/sats/id1272653109)

Enhance your fitness journey with personalized training experiences. Discover new classes, book sessions with personal trainers, and participate in challenges. Connect with friends, track your progress automatically, and utilize exclusive rewards and discounts.

**Highlights:** Discover and book group classes, Book personal training sessions, Join fitness challenges, Connect and motivate friends, Automatic workout activity tracking, Manual activity logging, Access and use rewards/discounts

**Features:** macOS Compatibility, Apple Wallet, Apple Watch app, Vision Pro support

**In-app purchases:** none


### Boost System

[App page](https://appshunter.io/ios/app/boost-system/id1319312136)

**In-app purchases:** none


## Frequently asked questions

### Is SATS free?

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

### Is Boost System free?

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

### Do SATS or Boost System have ads?

Neither SATS nor Boost System shows ads.

### Which is updated more often, SATS or Boost System?

SATS ships an update fortnightly, and Boost System every 2 months. Most recently, SATS was updated on August 28, 2026 and Boost System on June 1, 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.*