# Reading Libraries vs Zero Gravity Coaching

The clearest difference is in-app purchases: Reading Libraries at none against Zero Gravity Coaching's 8. Zero Gravity Coaching's advantage is update cadence (every 3 weeks vs every 2 months) and iOS requirement (13.0 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. Zero Gravity Coaching sells 5 in-app purchases, starting at $14.99 per month. Reading Libraries asks for nothing beyond the download.

Reading Libraries ships an update every 2 months, Zero Gravity Coaching every 3 weeks. The most recent releases landed on October 2, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Reading Libraries | Zero Gravity Coaching |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Size | 50 MB | 159 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Reading Libraries](https://appshunter.io/developer/1721377569) | [Remote Coach Ltd](https://appshunter.io/developer/1457588518) |

## What reviewers say

### Reading Libraries

[App page](https://appshunter.io/ios/app/reading-libraries/id6474335161)

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

**In-app purchases:** none


### Zero Gravity Coaching

[App page](https://appshunter.io/ios/app/zero-gravity-coaching/id6756430342)

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Foundation Subscription | $14.99 | per month |
| The Empower Subscription | $24.99 | per month |
| The Elite Subscription | $79.00 | per month |
| digitalproduct | $1.00 | one-time |
| digitalproduct | $5.00 | one-time |


## Frequently asked questions

### Is Reading Libraries free?

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

### Is Zero Gravity Coaching free?

Zero Gravity Coaching is free to download, with in-app purchases available.

### Do Reading Libraries or Zero Gravity Coaching have ads?

Neither Reading Libraries nor Zero Gravity Coaching shows ads.

### Which is updated more often, Reading Libraries or Zero Gravity Coaching?

Reading Libraries ships an update every 2 months, and Zero Gravity Coaching every 3 weeks. Most recently, Reading Libraries was updated on October 2, 2026 and Zero Gravity Coaching on September 29, 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.*