# Hummingbird Biofeedback vs Aster

The clearest difference is device support: Hummingbird Biofeedback at 3 against Aster's 1. Hummingbird Biofeedback also leads on iOS requirement (15.1 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Hummingbird Biofeedback sells 1 one-off in-app purchase and Aster sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Hummingbird Biofeedback ships an update monthly, Aster every 3 weeks. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Hummingbird Biofeedback | Aster |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Size | 25 MB | 2 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Samantha Chan](https://appshunter.io/developer/1842619270) | [Gradatim Pty Ltd](https://appshunter.io/developer/6792458445) |

## What reviewers say

### Hummingbird Biofeedback

[App page](https://appshunter.io/ios/app/hummingbird-biofeedback/id6762854409)

**Features:** macOS Compatibility, iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hummingbird Biofeedback | $29.99 | one-time |


### Aster

[App page](https://appshunter.io/ios/app/aster-endometriosis-tracker/id6792458443)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Aster Premium Monthly | $3.99 | per month |
| Aster Premium Yearly | $29.99 | per year |


## Frequently asked questions

### Is Hummingbird Biofeedback free?

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

### Is Aster free?

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

### Do Hummingbird Biofeedback or Aster have ads?

Neither Hummingbird Biofeedback nor Aster shows ads.

### Which is updated more often, Hummingbird Biofeedback or Aster?

Hummingbird Biofeedback ships an update monthly, and Aster every 3 weeks. Most recently, Hummingbird Biofeedback was updated on October 28, 2026 and Aster on October 24, 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.*