# Headstrong vs SLO x FORM

The clearest difference is ads: SLO x FORM at none against Headstrong's shown. Headstrong's advantage is device support (3 vs 1). On price, update cadence, in-app purchases 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.

Headstrong ships an update monthly, SLO x FORM every 3 weeks. The most recent releases landed on October 7, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Headstrong | SLO x FORM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (27 ratings)](https://appshunter.io/ios/app/slo-x-form/id6748541120/reviews)** |
| Number of ratings | — | **27** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | — | Ad-supported |
| Size | 93 MB | 38 MB |
| Requires iOS | **15** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Headstrong Fit, LLC](https://appshunter.io/developer/1530611235) | [SLO x FORM](https://appshunter.io/developer/1826134265) |

## What reviewers say

### Headstrong

[App page](https://appshunter.io/ios/app/headstrong/id6452084192)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### SLO x FORM

[App page](https://appshunter.io/ios/app/slo-x-form/id6748541120)

Easily browse and purchase class packs or membership options. View the class schedule, filter by type, and manage your reservations to stay organized and committed to your fitness goals.

**Highlights:** Purchase class packs and memberships, Browse class schedule, Filter classes by type, Manage reservations, Stay organized with fitness goals

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Headstrong free?

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

### Is SLO x FORM free?

SLO x FORM is free to download, with no in-app purchases.

### Do Headstrong or SLO x FORM have ads?

Headstrong shows ads; SLO x FORM does not.

### Which is updated more often, Headstrong or SLO x FORM?

Headstrong ships an update monthly, and SLO x FORM every 3 weeks. Most recently, Headstrong was updated on October 7, 2026 and SLO x FORM on October 12, 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.*