# SkyLetter vs Glitch Clock

The clearest difference is iOS requirement: SkyLetter at 12.0 against Glitch Clock's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SkyLetter ships an update fortnightly, Glitch Clock every 10 days. The most recent releases landed on October 24, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | SkyLetter | Glitch Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/skyletter/id1469768088/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 10 days** |
| Monetization | Free | — |
| Size | 45 MB | 3 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Kiyotaka Watanabe](https://appshunter.io/developer/1408976233) | [Ryoma Yanagimoto](https://appshunter.io/developer/1681944215) |

## What reviewers say

### SkyLetter

[App page](https://appshunter.io/ios/app/skyletter/id1469768088)

Create personalized messages drawn in the sky with airplane contrails. Share your creations as videos or photos on social media, perfect for sending unique greetings or declarations.

**Highlights:** Draw messages in the sky with contrails, Share creations as video or photo, Personalize messages for friends, Unique social media content

**Features:** macOS Compatibility

**In-app purchases:** none


### Glitch Clock

[App page](https://appshunter.io/ios/app/glitch-clock/id6779477282)

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

**In-app purchases:** none


## Frequently asked questions

### Is SkyLetter free?

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

### Is Glitch Clock free?

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

### Do SkyLetter or Glitch Clock have ads?

Neither SkyLetter nor Glitch Clock shows ads.

### Which is updated more often, SkyLetter or Glitch Clock?

SkyLetter ships an update fortnightly, and Glitch Clock every 10 days. Most recently, SkyLetter was updated on October 24, 2026 and Glitch Clock on October 10, 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.*