# Pocket Marine vs Reef.Tools

The clearest difference is review sentiment: Pocket Marine at 79% against Reef.Tools's 0%. Pocket Marine also leads on rating (4.8 vs 3.0) and ratings volume (597 vs 2). Reef.Tools's advantage is price (Free vs $3.99) and update cadence (daily vs fortnightly). On ads, in-app purchases, monetization model and device support there is nothing between them.

Reef.Tools is free to download; Pocket Marine costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Pocket Marine holds the better App Store score, 4.8 against 3.0. That said, the two scores are not equally well evidenced: Pocket Marine has 597 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 79% of Pocket Marine's written reviews are positive against 0% of Reef.Tools's.

Pocket Marine ships an update fortnightly, Reef.Tools daily. The most recent releases landed on October 24, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Pocket Marine | Reef.Tools |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[4.8 (597 ratings)](https://appshunter.io/ios/app/pocket-marine/id999538938/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/reeftools/id6739948464/reviews) |
| Number of ratings | **597** | 2 |
| Positive reviews | **78.8% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Daily** |
| Monetization | Free | Free |
| Size | 213 MB | 32 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Liam Salmons](https://appshunter.io/developer/999538937) | [Ivena LLC](https://appshunter.io/developer/1787597398) |

## What reviewers say

### Pocket Marine

[App page](https://appshunter.io/ios/app/pocket-marine/id999538938)

Manage all your aquarium data in one place. Track water parameters, inhabitants, dosing, and maintenance with detailed logs and reminders. Access an extensive library of marine species to make informed decisions about new additions.

**Highlights:** Marine species encyclopedia (800+), Water parameter testing journal, Inhabitant and dosing logs, Maintenance and water change journals, Species compatibility guide, Useful calculators, Customizable reminders

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

**In-app purchases:** none

**What reviewers like**

- 👍 Helpful for tracking parameters
- 🚀 Fantastic data base
- 👍 Well designed app
- 👍 Comprehensive features
- 👍 Useful for new marine aquarium keepers

**What reviewers complain about**

- 🐛 Crashes when trying to set up aquarium
- 🐛 Deletes test results
- 🐛 Buggy and unstable
- 🐛 Spelling mistakes
- 🐛 Unable to change default parameters

**Reported bugs**

- Crashes when trying to edit targets/ranges
- Endless scroll to select values
- Inconsistent behavior when switching between Celsius and Fahrenheit
- Crashes when accessing certain sections like soft corals

**Requested features**

- Ability to sync data across devices
- Customizable home screen
- Tracking for spending on tank supplies
- Ability to set default parameters
- Graphs showing multiple parameters together


### Reef.Tools

[App page](https://appshunter.io/ios/app/reeftools/id6739948464)

This app simplifies reef tank maintenance with science-backed tools. It offers a precision dosing calculator for over 30 elements, customizable schedules, and insights into water chemistry. Compare your tank's parameters to natural ocean values.

**Highlights:** Precision dosing calculator for 30+ elements, Customizable dosing schedules, Reef chemistry insights, Support for multiple brands and custom targets, Comparison to natural ocean parameters

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Pocket Marine free?

Pocket Marine costs $3.99, with no in-app purchases.

### Is Reef.Tools free?

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

### Which has better reviews, Pocket Marine or Reef.Tools?

Pocket Marine is rated higher. Pocket Marine averages 4.8 out of 5 from 597 ratings, while Reef.Tools averages 3.0 from 2 ratings.

### Do Pocket Marine or Reef.Tools have ads?

Neither Pocket Marine nor Reef.Tools shows ads.

### Which is updated more often, Pocket Marine or Reef.Tools?

Pocket Marine ships an update fortnightly, and Reef.Tools daily. Most recently, Pocket Marine was updated on October 24, 2026 and Reef.Tools on September 30, 2026.

---

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