# StarTeller vs Cosmo Pro

The clearest difference is update cadence: StarTeller at every 2 weeks against Cosmo Pro's every 3 months. StarTeller also leads on iOS requirement (16.4 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. StarTeller sells 1 one-off in-app purchase and Cosmo Pro sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

StarTeller ships an update every 2 weeks, Cosmo Pro every 3 months. The most recent releases landed on October 14, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | StarTeller | Cosmo Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (9 ratings)](https://appshunter.io/ios/app/starteller/id6760154168/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 months |
| Monetization | Freemium | — |
| Size | 152 MB | 30 MB |
| Requires iOS | **16.4** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Peryhelion LLC](https://appshunter.io/developer/1882888047) | [Tariq Al-aqrabawi](https://appshunter.io/developer/1877383192) |

## What reviewers say

### StarTeller

[App page](https://appshunter.io/ios/app/starteller/id6760154168)

This astronomy planner helps astrophotographers find the best times to capture deep-sky objects. It provides detailed visibility data, object coordinates, and an interactive sky map, all calculated precisely on your device.

**Highlights:** 13,000+ deep-sky objects, Full visibility data (rise, peak, set times), Interactive sky map with AR mode, Offline calculations, Customizable locations, Night vision red mode

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| StarTeller Pro | $4.99 | one-time |


### Cosmo Pro

[App page](https://appshunter.io/ios/app/cosmo-pro/id6774987613)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cosmos Pro — Lifetime Unlock | $0.99 | one-time |


## Frequently asked questions

### Is StarTeller free?

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

### Is Cosmo Pro free?

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

### Do StarTeller or Cosmo Pro have ads?

Neither StarTeller nor Cosmo Pro shows ads.

### Which is updated more often, StarTeller or Cosmo Pro?

StarTeller ships an update every 2 weeks, and Cosmo Pro every 3 months. Most recently, StarTeller was updated on October 14, 2026 and Cosmo Pro on October 1, 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.*