# Sky Planner vs Caelo

The clearest difference is in-app purchases: Sky Planner at none against Caelo's 4. Sky Planner also leads on update cadence (every 10 days vs every 3 weeks). Caelo's advantage is iOS requirement (18.0 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Caelo sells 4 one-off in-app purchases. Sky Planner asks for nothing beyond the download.

Sky Planner ships an update every 10 days, Caelo every 3 weeks. Both last shipped on November 5, 2026.

## The numbers

| Metric | Sky Planner | Caelo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (4 ratings)](https://appshunter.io/ios/app/sky-planner-darkscout/id6760223860/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 3 weeks |
| Monetization | Free | — |
| Size | 25 MB | 16 MB |
| Requires iOS | 26.0 | **18.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Sebastian Mraz](https://appshunter.io/developer/1883345914) | [Paul Jeffrey Smith](https://appshunter.io/developer/6785107056) |

## What reviewers say

### Sky Planner

[App page](https://appshunter.io/ios/app/sky-planner-darkscout/id6760223860)

This app helps you plan stargazing and astrophotography sessions by providing cloud cover, Moon conditions, and observing target information. It offers forecasts up to 14 nights ahead and includes features for meteor showers and observing challenges.

**Highlights:** Cloud cover and Moon condition forecasts, Observing target catalog, Meteor shower field guides, Observing challenges, 72-hour cloud-cover map, Horizon profiles, Astrophoto sharing

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

**In-app purchases:** none


### Caelo

[App page](https://appshunter.io/ios/app/caelo/id6786577782)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Medium Tip | $1.99 | one-time |
| Large Tip | $2.99 | one-time |
| Caelo Pro | $3.99 | one-time |


## Frequently asked questions

### Is Sky Planner free?

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

### Is Caelo free?

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

### Do Sky Planner or Caelo have ads?

Neither Sky Planner nor Caelo shows ads.

### Which is updated more often, Sky Planner or Caelo?

Sky Planner ships an update every 10 days, and Caelo every 3 weeks. Most recently, Sky Planner was updated on November 5, 2026 and Caelo on November 5, 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.*