# Spark SLO vs Headstrong

The clearest difference is ads: Spark SLO 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.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on September 24, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Spark SLO | Headstrong |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (543 ratings)](https://appshunter.io/ios/app/spark-slo/id1523088322/reviews)** | — |
| Number of ratings | **543** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Monthly | Monthly |
| Monetization | Ad-supported | — |
| Size | 38 MB | 93 MB |
| Requires iOS | 16.0 | **15** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nick and Steph Young LLC](https://appshunter.io/developer/1497625125) | [Headstrong Fit, LLC](https://appshunter.io/developer/1530611235) |

## What reviewers say

### Spark SLO

[App page](https://appshunter.io/ios/app/spark-slo/id1523088322)

This app offers a supportive environment for yoga practice, encouraging freedom of expression, playfulness, and compassion. It aims to foster personal growth through inward exploration in a judgment-free space.

**Highlights:** Supportive family-based yoga, Freedom of expression, Playfulness and compassion, Inward exploration, Judgment-free space

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

**In-app purchases:** none


### Headstrong

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

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Spark SLO free?

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

### Is Headstrong free?

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

### Do Spark SLO or Headstrong have ads?

Headstrong shows ads; Spark SLO does not.

### Which is updated more often, Spark SLO or Headstrong?

Spark SLO ships an update monthly, and Headstrong monthly. Most recently, Spark SLO was updated on September 24, 2026 and Headstrong on September 11, 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.*