# SelfAssay vs fillin

The clearest difference is in-app purchases: fillin at none against SelfAssay's 2. SelfAssay's advantage is update cadence (every 10 days vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. SelfAssay sells 2 in-app purchases, starting at $19.99 per month. fillin asks for nothing beyond the download.

SelfAssay ships an update every 10 days, fillin every 2 months. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | SelfAssay | fillin |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 2 months |
| Size | 67 MB | 10 MB |
| Requires iOS | **16.4** | 17.6 |
| Devices | iPhone | iPhone |
| Age rating | 17+ | 12+ |
| Developer | [Sandro Andric](https://appshunter.io/developer/1868438293) | [Aimgonna Inc.](https://appshunter.io/developer/6780927794) |

## What reviewers say

### SelfAssay

[App page](https://appshunter.io/ios/app/selfassay/id6779266091)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SelfAssay Pro | $19.99 | per month |
| SelfAssay Pro | $149.99 | per year |


### fillin

[App page](https://appshunter.io/ios/app/fillin-supplement-tracker/id6780927792)

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

**In-app purchases:** none


## Frequently asked questions

### Is SelfAssay free?

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

### Is fillin free?

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

### Do SelfAssay or fillin have ads?

Neither SelfAssay nor fillin shows ads.

### Which is updated more often, SelfAssay or fillin?

SelfAssay ships an update every 10 days, and fillin every 2 months. Most recently, SelfAssay was updated on October 25, 2026 and fillin on October 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.*