# Reef Guide vs DiveDex

The clearest difference is price: DiveDex at Free against Reef Guide's $2.99. DiveDex also leads on update cadence (every 4 weeks vs every 6 months) and iOS requirement (16.0 vs 27.0). On ads, in-app purchases and device support there is nothing between them.

DiveDex is free to download; Reef Guide costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Reef Guide ships an update every 6 months, DiveDex every 4 weeks. The most recent releases landed on October 24, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Reef Guide | DiveDex |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 4 weeks** |
| Size | 1.8 GB | 89 MB |
| Requires iOS | 27.0 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Harald Feiste](https://appshunter.io/developer/1021088671) | [donarun DAS](https://appshunter.io/developer/6783183987) |

## What reviewers say

### Reef Guide

[App page](https://appshunter.io/ios/app/reef-guide/id1021088672)

**Features:** macOS Compatibility

**In-app purchases:** none


### DiveDex

[App page](https://appshunter.io/ios/app/divedex-fish-and-reef-id/id6783183985)

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

**In-app purchases:** none


## Frequently asked questions

### Is Reef Guide free?

Reef Guide costs $2.99, with no in-app purchases.

### Is DiveDex free?

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

### Do Reef Guide or DiveDex have ads?

Neither Reef Guide nor DiveDex shows ads.

### Which is updated more often, Reef Guide or DiveDex?

Reef Guide ships an update every 6 months, and DiveDex every 4 weeks. Most recently, Reef Guide was updated on October 24, 2026 and DiveDex on October 4, 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.*