# ReefDiary - Aquarium Log — Test. Dose. Thrive.

> Test. Dose. Thrive. (iPhone/iPad app by Petr Persianov.)

- Source: https://appshunter.io/ios/app/reefdiary-aquarium-log/id6762562058 (this page in markdown: same URL + `.md`)
- Developer: [Petr Persianov](https://appshunter.io/developer/1883368529)
- Category: Utilities, Lifestyle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 9 MB
- Languages: American English, Dutch, French (France), German (Germany), Japanese, Brazilian Portuguese, European Spanish
- Released: 2026-04-23
- Data updated: 2026-08-28
- User reviews in markdown: https://appshunter.io/ios/app/reefdiary-aquarium-log/id6762562058/reviews.md

## What is ReefDiary?

Log saltwater aquarium parameters, spot stability drift, calculate dosing amounts, and keep reef care decisions grounded in your own data.

KEY FEATURES:
- Log Ca, Alk, Mg, pH, Salinity, Temp, NO3, PO4 in seconds
- 2-part dosing calculator (BRS, ESV, Tropic Marin, custom)
- Color-coded parameter cards show instant health status
- Trend charts reveal drift, recovery, and repeat patterns
- Exportable reports for second opinions, store visits, or support threads
- Multiple tank support with separate histories and routines

BUILT FOR REEF KEEPERS:
- No account required, no cloud sync; reef data stays local
- Works offline - practical for fish rooms and maintenance benches
- Dense, scannable interface designed for daily reef checks

PRO FEATURES (monthly, yearly, or lifetime):
- Unlimited tanks and full long-range parameter history
- Advanced dosing products and custom formulas
- CSV exports and shareable reef detail images
- Custom testing cadence and dosing follow-through

Free to download. Pro unlocks the long view: full history, reports, formulas, routines, and unlimited reef systems.



LEGAL:
- Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
- Privacy Policy: https://peachuinc.github.io/legal/reefdiary/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

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



## Version history (last 4 releases)

### 1.0.3 — 2026-07-07

New in this update:
- Added Lifetime Pro alongside monthly and yearly plans.
- Added a Settings privacy control for anonymous usage analytics; reef tank names, readings, notes, dosing amounts, exports, emails, and identifiers are never sent.
- Improved the Rate on App Store and support flow, including clearer TestFlight feedback handling.
- Refined purchase, restore, paywall, privacy, and localization details.

### 1.0.2 — 2026-07-02

New in this update:
- Renamed the app and public metadata to ReefDiary.
- Choose metric or imperial units per tank, with safer handling for historical readings.
- Share a polished reef statistics image from each tank.
- Improved dosing calculator with custom products, split-dose guidance, dose logging, and dosing reminders.
- Refined tank details, history, settings, reminders, and translations.

### 1.0.1 — 2026-05-18

New in this update:
- Choose metric or imperial units per tank, with safer handling for historical readings.
- Share a polished reef statistics image from each tank.
- Improved dosing calculator with custom products, split-dose guidance, dose logging, and dosing reminders.
- Refined tank details, history, settings, reminders, and translations.

### 1.0.0 — 2026-04-24

No release notes.

## More apps by Petr Persianov

- [RoofCalc - Roofing Estimator](https://appshunter.io/ios/app/roofcalc-roofing-estimator/id6762532438)
- [Zmanim: Siddur & Prayer Times](https://appshunter.io/ios/app/zmanim-siddur-and-prayer-times/id6762658728)
- [NapPilot - Baby Sleep](https://appshunter.io/ios/app/nappilot-baby-sleep/id6767699849)
- [Verbly: French Verbs](https://appshunter.io/ios/app/verbly-french-verbs/id6787894843)

All apps by Petr Persianov: https://appshunter.io/developer/1883368529

## Related topics

[tetra my aquarium](https://appshunter.io/ios/topics/tetra-my-aquarium)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-28.*