# ZAstronomy vs Statistics Solver + Calculator

The clearest difference is in-app purchases: ZAstronomy at none against Statistics Solver + Calculator's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Statistics Solver + Calculator sells 3 in-app purchases, starting at $4.99 per 7 days. ZAstronomy asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | ZAstronomy | Statistics Solver + Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | Every 4 months |
| Size | 71 MB | 66 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Alenti Technologies](https://appshunter.io/developer/1113994945) | [Yorgi Del Rio](https://appshunter.io/developer/1845433622) |

## What reviewers say

### ZAstronomy

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

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

**In-app purchases:** none


### Statistics Solver + Calculator

[App page](https://appshunter.io/ios/app/statistics-solver-plus-calculator/id6759198563)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $4.99 | per 7 days |
| Annual | $19.99 | per year |
| Stat Solver Pro Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is ZAstronomy free?

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

### Is Statistics Solver + Calculator free?

Statistics Solver + Calculator is free to download, with in-app purchases available.

### Do ZAstronomy or Statistics Solver + Calculator have ads?

Neither ZAstronomy nor Statistics Solver + Calculator shows ads.

### Which is updated more often, ZAstronomy or Statistics Solver + Calculator?

ZAstronomy ships an update every 4 months, and Statistics Solver + Calculator every 4 months. Most recently, ZAstronomy was updated on November 7, 2026 and Statistics Solver + Calculator on October 31, 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.*