# AstroPlan vs SharpStacker

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

Both are free to download. AstroPlan sells 4 in-app purchases, starting at $4.99 per month. SharpStacker asks for nothing beyond the download.

AstroPlan ships an update every 4 days, SharpStacker fortnightly. The most recent releases landed on September 25, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | AstroPlan | SharpStacker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Fortnightly |
| Size | 40 MB | 17 MB |
| Requires iOS | **17.0** | 18.6 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Martin Wilcox](https://appshunter.io/developer/6774190373) | [LUIGI VANNOZZI](https://appshunter.io/developer/6783673110) |

## What reviewers say

### AstroPlan

[App page](https://appshunter.io/ios/app/astroplan/id6774190371)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AstroPlan Pro Monthly | $4.99 | per month |
| AstroPlan Pro AI Monthly | $9.99 | per month |
| AstroPlan Pro Yearly | $39.99 | per year |
| AstroPlan Pro AI Yearly | $79.99 | per year |


### SharpStacker

[App page](https://appshunter.io/ios/app/sharpstacker/id6783673108)

**In-app purchases:** none


## Frequently asked questions

### Is AstroPlan free?

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

### Is SharpStacker free?

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

### Do AstroPlan or SharpStacker have ads?

Neither AstroPlan nor SharpStacker shows ads.

### Which is updated more often, AstroPlan or SharpStacker?

AstroPlan ships an update every 4 days, and SharpStacker fortnightly. Most recently, AstroPlan was updated on September 25, 2026 and SharpStacker on September 28, 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.*