# StampRef vs Aqualens

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

Both are free to download. StampRef sells 3 in-app purchases, starting at $4.99 per 7 days and Aqualens sells 3 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

StampRef ships an update every 3 weeks, Aqualens every 11 days. The most recent releases landed on October 10, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | StampRef | Aqualens |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 11 days** |
| Size | 140 MB | 115 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Victor Pham](https://appshunter.io/developer/1882301002) | [Anh Dinh](https://appshunter.io/developer/1887512380) |

## What reviewers say

### StampRef

[App page](https://appshunter.io/ios/app/stampref-stamp-identifier/id6760886317)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $4.99 | per 7 days |
| Monthly Premium | $8.99 | per month |
| Yearly Premium | $59.99 | per year |


### Aqualens

[App page](https://appshunter.io/ios/app/aqualens-fish-identifier/id6761178548)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $2.99 | per 7 days |
| Monthly Premium | $4.99 | per month |
| Yearly Premium | $29.99 | per year |


## Frequently asked questions

### Is StampRef free?

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

### Is Aqualens free?

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

### Do StampRef or Aqualens have ads?

Aqualens shows ads; StampRef does not.

### Which is updated more often, StampRef or Aqualens?

StampRef ships an update every 3 weeks, and Aqualens every 11 days. Most recently, StampRef was updated on October 10, 2026 and Aqualens on October 9, 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.*