# Coralytic vs TankDiary

The clearest difference is in-app purchases: Coralytic at none against TankDiary's 2. Coralytic also leads on update cadence (daily vs every 11 days). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. TankDiary sells 2 in-app purchases, starting at $9.99 per year. Coralytic asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Coralytic against 5.0 for TankDiary. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

Coralytic ships an update daily, TankDiary every 11 days. The most recent releases landed on October 31, 2026 and November 11, 2026 respectively.

## The numbers

| Metric | Coralytic | TankDiary |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/coralytic-reef-tank-tracker/id6768277786/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/tankdiary-aquarium-tracker/id6788005172/reviews) |
| Number of ratings | 1 | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 11 days |
| Monetization | Freemium | Free with in-app purchases |
| Size | 13 MB | 2 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Lime Network LLC](https://appshunter.io/developer/1895008969) | [TOBY M BERGER](https://appshunter.io/developer/6776950197) |

## What reviewers say

### Coralytic

[App page](https://appshunter.io/ios/app/coralytic-reef-tank-tracker/id6768277786)

This app helps saltwater aquarium hobbyists track water parameters, monitor livestock, and receive AI-driven insights for reef health. It offers features like quick logging, maintenance scheduling, and a comprehensive livestock library, all within a user-friendly interface.

**Highlights:** Track 15 water parameters, Quick Log water parameters, Charts with target ranges, Reef Score™ health metric, Maintenance scheduler, Livestock library, ICP results entry, AI Insights recommendations

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

**In-app purchases:** none


### TankDiary

[App page](https://appshunter.io/ios/app/tankdiary-aquarium-tracker/id6788005172)

Easily track aquarium water parameters, schedule maintenance, and monitor your tank's health. This app helps you understand your tank's cycling stage and provides reliable reminders for water changes and other tasks. It offers detailed logging and historical charts for long-term trend analysis.

**Highlights:** Log water test results (ammonia, nitrite, nitrate, pH, etc.), Identify aquarium cycle stage, Schedule maintenance reminders (water changes, dosing), Water change calculator, Livestock and photo journal, Offline functionality, Interactive historical charts

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TankDiary Pro — Yearly | $9.99 | per year |
| TankDiary Pro — Lifetime | $24.99 | one-time |


## Frequently asked questions

### Is Coralytic free?

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

### Is TankDiary free?

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

### Which has better reviews, Coralytic or TankDiary?

Coralytic and TankDiary are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.

### Do Coralytic or TankDiary have ads?

Neither Coralytic nor TankDiary shows ads.

### Which is updated more often, Coralytic or TankDiary?

Coralytic ships an update daily, and TankDiary every 11 days. Most recently, Coralytic was updated on October 31, 2026 and TankDiary on November 11, 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.*