# ReefDiary vs Tanksmith

ReefDiary and Tanksmith are too close to call on the numbers: across 9 compared parameters — price, rating, ratings volume and update cadence 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. ReefDiary sells 3 in-app purchases, starting at $2.99 per 7 days and Tanksmith sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for ReefDiary against 5.0 for Tanksmith. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

ReefDiary ships an update every 4 weeks, Tanksmith fortnightly. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | ReefDiary | Tanksmith |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/reefdiary-aquarium-log/id6762562058/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/tanksmith/id6769517856/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Fortnightly** |
| Monetization | Freemium | Free with in-app purchases |
| Size | 9 MB | 5 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Petr Persianov](https://appshunter.io/developer/1883368529) | [OMAR DANIEL GRAZIANO](https://appshunter.io/developer/1896485759) |

## What reviewers say

### ReefDiary

[App page](https://appshunter.io/ios/app/reefdiary-aquarium-log/id6762562058)

Track saltwater aquarium parameters, calculate precise dosing, and visualize trends to maintain a stable reef environment. This app offers offline functionality and local data storage for reef keepers.

**Highlights:** Log aquarium parameters, Dosing calculator, Parameter trend charts, Exportable reports, Multiple tank support, Offline functionality

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ReefTrack Pro – Weekly | $2.99 | per 7 days |
| ReefTrack Pro – Monthly | $7.99 | per month |
| ReefTrack Pro – Yearly | $29.99 | per year |


### Tanksmith

[App page](https://appshunter.io/ios/app/tanksmith/id6769517856)

This app helps reef aquarium owners meticulously track water parameters, equipment maintenance, and livestock with photos. It offers detailed logging for water chemistry, test kits, and salt batches, with an optional pro version for advanced features like multi-tank management and PDF reporting.

**Highlights:** Offline reef tank logbook, Water parameter tracking, Equipment service logging, Livestock and coral photo management, Test kit and salt batch recording, Multi-tank management (Pro), Tank Report PDF generation (Pro)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tanksmith Pro | $9.99 | one-time |


## Frequently asked questions

### Is ReefDiary free?

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

### Is Tanksmith free?

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

### Which has better reviews, ReefDiary or Tanksmith?

ReefDiary and Tanksmith are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do ReefDiary or Tanksmith have ads?

Neither ReefDiary nor Tanksmith shows ads.

### Which is updated more often, ReefDiary or Tanksmith?

ReefDiary ships an update every 4 weeks, and Tanksmith fortnightly. Most recently, ReefDiary was updated on October 31, 2026 and Tanksmith on November 5, 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.*