# CALAD vs LetterRack

The clearest difference is in-app purchases: CALAD at none against LetterRack's 3. CALAD also leads on update cadence (every 3 days vs every 3 weeks) and iOS requirement (11.0 vs 26.4). On price, ads and device support there is nothing between them.

Both are free to download. LetterRack sells 3 in-app purchases, starting at $3.99 per month. CALAD asks for nothing beyond the download.

CALAD ships an update every 3 days, LetterRack every 3 weeks. The most recent releases landed on September 28, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | CALAD | LetterRack |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 3 weeks |
| Size | 38 MB | 28 MB |
| Requires iOS | **11.0** | 26.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Blue Source](https://appshunter.io/developer/373740309) | [Vincent Launay](https://appshunter.io/developer/1198218316) |

## What reviewers say

### CALAD

[App page](https://appshunter.io/ios/app/calad/id6468679831)

**Features:** macOS Compatibility

**In-app purchases:** none


### LetterRack

[App page](https://appshunter.io/ios/app/letterrack/id6764377699)

**Features:** Apple Watch app

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Xtremagic Pass | $3.99 | per month |
| Xtremagic Pass | $24.99 | per year |
| Full Access (One-Time Purchase) | $7.99 | one-time |


## Frequently asked questions

### Is CALAD free?

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

### Is LetterRack free?

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

### Do CALAD or LetterRack have ads?

Neither CALAD nor LetterRack shows ads.

### Which is updated more often, CALAD or LetterRack?

CALAD ships an update every 3 days, and LetterRack every 3 weeks. Most recently, CALAD was updated on September 28, 2026 and LetterRack on October 12, 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.*