# Reef Notes vs isybee

The clearest difference is iOS requirement: isybee at 15.0 against Reef Notes's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Reef Notes sells 1 in-app purchase, starting at $19.99 per year and isybee sells 1 in-app purchase, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Reef Notes ships an update every 6 days, isybee weekly. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Reef Notes | isybee |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 6 days** | Weekly |
| Size | 10 MB | 13 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [师兵 杜](https://appshunter.io/developer/6790610236) | [Bernhard Huber](https://appshunter.io/developer/6799118797) |

## What reviewers say

### Reef Notes

[App page](https://appshunter.io/ios/app/reef-notes-saltwater-tank/id6794147577)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Reef Notes Pro | $19.99 | per year |


### isybee

[App page](https://appshunter.io/ios/app/isybee/id6799118795)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| isybee Monatsabo | $0.99 | per month |


## Frequently asked questions

### Is Reef Notes free?

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

### Is isybee free?

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

### Do Reef Notes or isybee have ads?

Neither Reef Notes nor isybee shows ads.

### Which is updated more often, Reef Notes or isybee?

Reef Notes ships an update every 6 days, and isybee weekly. Most recently, Reef Notes was updated on November 6, 2026 and isybee on October 31, 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.*