# Re_Bound vs Collect Letters!

The clearest difference is in-app purchases: Re_Bound at none against Collect Letters!'s 10. Collect Letters!'s advantage is update cadence (every 17 months vs every 42 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Collect Letters! sells 10 one-off in-app purchases. Re_Bound asks for nothing beyond the download.

Re_Bound ships an update every 42 months, Collect Letters! every 17 months. The most recent releases landed on October 26, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Re_Bound | Collect Letters! |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 42 months | **Every 17 months** |
| Size | 21 MB | 157 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hoon Nam](https://appshunter.io/developer/452506721) | [Rootcraft](https://appshunter.io/developer/1370994577) |

## What reviewers say

### Re_Bound

[App page](https://appshunter.io/ios/app/re-bound/id1181703797)

**Features:** macOS Compatibility

**In-app purchases:** none


### Collect Letters!

[App page](https://appshunter.io/ios/app/collect-letters/id6462407299)

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3,000 Gems | $1.99 | one-time |
| 1,500 Cards | $1.99 | one-time |
| 1,000,000 Coins | $1.99 | one-time |
| 5,000 Gems | $2.99 | one-time |
| 8,000 Cards | $3.99 | one-time |
| 8,000 Gems | $3.99 | one-time |
| 16,000 Gems | $4.99 | one-time |
| 60,000 Cards | $5.99 | one-time |
| 50,000 Gems | $5.99 | one-time |
| 120,000 Gems | $6.99 | one-time |


## Frequently asked questions

### Is Re_Bound free?

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

### Is Collect Letters! free?

Collect Letters! is free to download, with in-app purchases available.

### Do Re_Bound or Collect Letters! have ads?

Both Re_Bound and Collect Letters! show ads.

### Which is updated more often, Re_Bound or Collect Letters!?

Re_Bound ships an update every 42 months, and Collect Letters! every 17 months. Most recently, Re_Bound was updated on October 26, 2026 and Collect Letters! on October 7, 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.*