# Wake Windows App vs SDG GYM

The clearest difference is in-app purchases: SDG GYM at none against Wake Windows App's 1. SDG GYM also leads on update cadence (every 2 months vs every 7 months) and iOS requirement (15.1 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Wake Windows App sells 1 one-off in-app purchase. SDG GYM asks for nothing beyond the download.

Wake Windows App ships an update every 7 months, SDG GYM every 2 months. The most recent releases landed on October 25, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Wake Windows App | SDG GYM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (10 ratings)](https://appshunter.io/ios/app/wake-windows-app/id6737334114/reviews)** | — |
| Number of ratings | **10** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 months** |
| Monetization | Free with in-app purchases | — |
| Size | 36 MB | 42 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Renu Narwal](https://appshunter.io/developer/1659617835) | [WebTech, vl. Josip Saric](https://appshunter.io/developer/1493928541) |

## What reviewers say

### Wake Windows App

[App page](https://appshunter.io/ios/app/wake-windows-app/id6737334114)

This app helps parents track and calculate optimal wake windows for their baby's naps. It provides instant calculations based on age and last nap, with customizable notifications to maintain a consistent sleep schedule for newborns, infants, and toddlers.

**Highlights:** Instant wake window calculations, Age-based calculator, Customizable notifications, Real-time schedule adjustments, User-friendly interface

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LifeTime Plan | $4.99 | one-time |


### SDG GYM

[App page](https://appshunter.io/ios/app/sdg-gym/id6739533512)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Wake Windows App free?

Wake Windows App is free to download, with in-app purchases available.

### Is SDG GYM free?

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

### Do Wake Windows App or SDG GYM have ads?

Neither Wake Windows App nor SDG GYM shows ads.

### Which is updated more often, Wake Windows App or SDG GYM?

Wake Windows App ships an update every 7 months, and SDG GYM every 2 months. Most recently, Wake Windows App was updated on October 25, 2026 and SDG GYM on October 18, 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.*