# Twinkle Clock vs Stelo

The clearest difference is in-app purchases: Stelo at none against Twinkle Clock's 1. Twinkle Clock's advantage is device support (4 vs 2). On price, update cadence, ads and iOS requirement there is nothing between them.

Both are free to download. Twinkle Clock sells 1 one-off in-app purchase. Stelo asks for nothing beyond the download.

Twinkle Clock ships an update fortnightly, Stelo weekly. The most recent releases landed on October 8, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Twinkle Clock | Stelo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/stelo-night-sky-diary/id6763764420/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | **Weekly** |
| Monetization | — | Free |
| Size | 23 MB | 1 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad, Mac, Vision Pro** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hiroyasu Hirai](https://appshunter.io/developer/455568461) | [JIYULMOM](https://appshunter.io/developer/379186743) |

## What reviewers say

### Twinkle Clock

[App page](https://appshunter.io/ios/app/twinkle-clock/id6467501688)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Twinkle Clock Pro | $24.99 | one-time |


### Stelo

[App page](https://appshunter.io/ios/app/stelo-night-sky-diary/id6763764420)

This app offers a private, ambient stargazing experience where new stars appear daily. Connect them to draw constellations, name them, and build a personal gallery. Special nights bring unique stars, and the app quietly identifies real constellations you draw.

**Highlights:** Daily new stars, Draw custom constellations, Name and save constellations, Special night events, Automatic constellation identification, Home screen widgets

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

**In-app purchases:** none


## Frequently asked questions

### Is Twinkle Clock free?

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

### Is Stelo free?

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

### Do Twinkle Clock or Stelo have ads?

Neither Twinkle Clock nor Stelo shows ads.

### Which is updated more often, Twinkle Clock or Stelo?

Twinkle Clock ships an update fortnightly, and Stelo weekly. Most recently, Twinkle Clock was updated on October 8, 2026 and Stelo on October 19, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*