# Observation vs Fovcus

The clearest difference is in-app purchases: Observation at none against Fovcus's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Fovcus sells 1 one-off in-app purchase. Observation asks for nothing beyond the download.

Observation ships an update every 2 weeks, Fovcus monthly. The most recent releases landed on October 10, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Observation | Fovcus |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Monthly |
| Size | 80 MB | 32 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Stichting Observation International](https://appshunter.io/developer/1464543487) | [ross cowen](https://appshunter.io/developer/1895018014) |

## What reviewers say

### Observation

[App page](https://appshunter.io/ios/app/observation/id6446407612)

**Features:** Vision Pro support

**In-app purchases:** none


### Fovcus

[App page](https://appshunter.io/ios/app/fovcus-amsler-grid-tracker/id6762800841)

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fovcus Pro | $6.99 | one-time |


## Frequently asked questions

### Is Observation free?

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

### Is Fovcus free?

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

### Do Observation or Fovcus have ads?

Neither Observation nor Fovcus shows ads.

### Which is updated more often, Observation or Fovcus?

Observation ships an update every 2 weeks, and Fovcus monthly. Most recently, Observation was updated on October 10, 2026 and Fovcus on October 25, 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.*