# Day One vs Aster

The clearest difference is update cadence: Day One at weekly against Aster's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Day One sells 1 in-app purchase, starting at $9.99 per month 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.

Day One ships an update weekly, Aster every 3 weeks. The most recent releases landed on October 15, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Day One | Aster |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 weeks |
| Size | 86 MB | 2 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Florian Beer](https://appshunter.io/developer/1878702625) | [Gradatim Pty Ltd](https://appshunter.io/developer/6792458445) |

## What reviewers say

### Day One

[App page](https://appshunter.io/ios/app/day-one-future-self/id6761305395)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Day One Premium | $9.99 | per month |


### 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 Day One free?

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

### Is Aster free?

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

### Do Day One or Aster have ads?

Neither Day One nor Aster shows ads.

### Which is updated more often, Day One or Aster?

Day One ships an update weekly, and Aster every 3 weeks. Most recently, Day One was updated on October 15, 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.*