# Aquarist's Notes vs Reef Trak

Aquarist's Notes and Reef Trak are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Aquarist's Notes sells 2 in-app purchases, starting at $1.99 per month and Reef Trak sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Aquarist's Notes ships an update every 6 days, Reef Trak weekly. The most recent releases landed on September 11, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Aquarist's Notes | Reef Trak |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (33 ratings)](https://appshunter.io/ios/app/reef-trak-reef-manager/id6741099733/reviews)** |
| Number of ratings | — | **33** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 6 days** | Weekly |
| Monetization | — | Freemium |
| Size | 16 MB | 109 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ludek Slouf](https://appshunter.io/developer/1664390856) | [Joe Marino](https://appshunter.io/developer/1793070192) |

## What reviewers say

### Aquarist's Notes

[App page](https://appshunter.io/ios/app/aquarists-notes/id6451252680)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly subscription | $1.99 | per month |
| Annual subscription | $9.99 | per year |


### Reef Trak

[App page](https://appshunter.io/ios/app/reef-trak-reef-manager/id6741099733)

This app helps reef tank enthusiasts manage all aspects of their aquarium, from daily testing and livestock records to equipment tracking and maintenance schedules. It provides tools for data analysis, trend spotting, and preventing costly mistakes, offering both free and premium features.

**Highlights:** Parameter logging and trend charts, Livestock library with care profiles, Tank health snapshots and data export, Equipment and maintenance tracking, Dosing calculators and unit converters, Progress photo logging

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Reef Trak Premium Monthly | $3.99 | per month |
| Reef Trak Lifetime | $9.99 | one-time |


## Frequently asked questions

### Is Aquarist's Notes free?

Aquarist's Notes is free to download, with in-app purchases available.

### Is Reef Trak free?

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

### Do Aquarist's Notes or Reef Trak have ads?

Neither Aquarist's Notes nor Reef Trak shows ads.

### Which is updated more often, Aquarist's Notes or Reef Trak?

Aquarist's Notes ships an update every 6 days, and Reef Trak weekly. Most recently, Aquarist's Notes was updated on September 11, 2026 and Reef Trak on September 23, 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.*