# Aquarium Notepad vs QR code Scanner (by Danver)

The clearest difference is ads: Aquarium Notepad at none against QR code Scanner (by Danver)'s shown. Aquarium Notepad also leads on update cadence (every 3 days vs every 11 days). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Aquarium Notepad ships an update every 3 days, QR code Scanner (by Danver) every 11 days. The most recent releases landed on June 1, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Aquarium Notepad | QR code Scanner (by Danver) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/aquarium-notepad/id6749213015/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 3 days** | Every 11 days |
| Monetization | Free | — |
| Size | 35 MB | 38 MB |
| Requires iOS | 12 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Quantum Technologies Limited Liability Company](https://appshunter.io/developer/1588354820) | [Danver](https://appshunter.io/developer/1814042594) |

## What reviewers say

### Aquarium Notepad

[App page](https://appshunter.io/ios/app/aquarium-notepad/id6749213015)

Manage your aquariums with detailed tracking of water parameters, maintenance schedules, and measurements. This app offers comprehensive tools for serious aquarists to maintain optimal conditions and keep thorough records of their aquatic environments.

**Highlights:** Water parameter tracking, Maintenance task scheduling, Measurement logging, Multiple aquarium support, Data import/export, Charts and analytics

**Features:** macOS Compatibility

**In-app purchases:** none


### QR code Scanner (by Danver)

[App page](https://appshunter.io/ios/app/qr-code-scanner-by-danver/id6749786737)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Aquarium Notepad free?

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

### Is QR code Scanner (by Danver) free?

QR code Scanner (by Danver) is free to download, with no in-app purchases.

### Do Aquarium Notepad or QR code Scanner (by Danver) have ads?

QR code Scanner (by Danver) shows ads; Aquarium Notepad does not.

### Which is updated more often, Aquarium Notepad or QR code Scanner (by Danver)?

Aquarium Notepad ships an update every 3 days, and QR code Scanner (by Danver) every 11 days. Most recently, Aquarium Notepad was updated on June 1, 2026 and QR code Scanner (by Danver) on September 10, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*