# Second Wind Swim School vs Reading Challenge

The clearest difference is in-app purchases: Second Wind Swim School at none against Reading Challenge's 3. Reading Challenge's advantage is iOS requirement (13.0 vs 15.1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Reading Challenge sells 3 in-app purchases, starting at $1.49 per month. Second Wind Swim School asks for nothing beyond the download.

Second Wind Swim School ships an update every 6 weeks, Reading Challenge every 3 weeks. The most recent releases landed on October 8, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Second Wind Swim School | Reading Challenge |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Size | 42 MB | 27 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Member Retention Systems PTY LTD](https://appshunter.io/developer/1718495379) | [Shohruxbek Atavullayev](https://appshunter.io/developer/1859528937) |

## What reviewers say

### Second Wind Swim School

[App page](https://appshunter.io/ios/app/second-wind-swim-school/id6742015377)

**Features:** macOS Compatibility

**In-app purchases:** none


### Reading Challenge

[App page](https://appshunter.io/ios/app/reading-challenge/id6756414640)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $1.49 | per month |
| Yearly Premium | $7.99 | per year |
| Lifetime Premium | $14.99 | one-time |


## Frequently asked questions

### Is Second Wind Swim School free?

Second Wind Swim School is free to download, with no in-app purchases.

### Is Reading Challenge free?

Reading Challenge is free to download, with in-app purchases available.

### Do Second Wind Swim School or Reading Challenge have ads?

Neither Second Wind Swim School nor Reading Challenge shows ads.

### Which is updated more often, Second Wind Swim School or Reading Challenge?

Second Wind Swim School ships an update every 6 weeks, and Reading Challenge every 3 weeks. Most recently, Second Wind Swim School was updated on October 8, 2026 and Reading Challenge on October 12, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*