# Second Wind Swim School vs Number Master

The clearest difference is ads: Second Wind Swim School at none against Number Master's shown. Number Master's advantage is update cadence (every 5 days vs every 6 weeks). 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.

Second Wind Swim School ships an update every 6 weeks, Number Master every 5 days. The most recent releases landed on October 8, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Second Wind Swim School | Number Master |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Every 5 days** |
| Size | 42 MB | 161 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Member Retention Systems PTY LTD](https://appshunter.io/developer/1718495379) | [ENDEVLAB](https://appshunter.io/developer/1803275438) |

## 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


### Number Master

[App page](https://appshunter.io/ios/app/number-master-brain-boost/id6809281335)

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

**In-app purchases:** none


## Frequently asked questions

### Is Second Wind Swim School free?

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

### Is Number Master free?

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

### Do Second Wind Swim School or Number Master have ads?

Number Master shows ads; Second Wind Swim School does not.

### Which is updated more often, Second Wind Swim School or Number Master?

Second Wind Swim School ships an update every 6 weeks, and Number Master every 5 days. Most recently, Second Wind Swim School was updated on October 8, 2026 and Number Master on October 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.*