# ZAstronomy vs StudiBuddi

The clearest difference is in-app purchases: ZAstronomy at none against StudiBuddi's 1. StudiBuddi's advantage is update cadence (every 6 days vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. StudiBuddi sells 1 one-off in-app purchase. ZAstronomy asks for nothing beyond the download.

ZAstronomy ships an update every 4 months, StudiBuddi every 6 days. The most recent releases landed on November 7, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | ZAstronomy | StudiBuddi |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 6 days** |
| Size | 71 MB | 169 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Alenti Technologies](https://appshunter.io/developer/1113994945) | [Tyrone Kasi](https://appshunter.io/developer/1801261085) |

## What reviewers say

### ZAstronomy

[App page](https://appshunter.io/ios/app/zastronomy/id6450145744)

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

**In-app purchases:** none


### StudiBuddi

[App page](https://appshunter.io/ios/app/studibuddi/id6756455330)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Week | $1.99 | one-time |


## Frequently asked questions

### Is ZAstronomy free?

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

### Is StudiBuddi free?

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

### Do ZAstronomy or StudiBuddi have ads?

Neither ZAstronomy nor StudiBuddi shows ads.

### Which is updated more often, ZAstronomy or StudiBuddi?

ZAstronomy ships an update every 4 months, and StudiBuddi every 6 days. Most recently, ZAstronomy was updated on November 7, 2026 and StudiBuddi on November 9, 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.*