# Tank Timeline — Aquarium Log & Water Tests

> Aquarium Log & Water Tests (iPhone/iPad app by Vadim Danilov.)

- Source: https://appshunter.io/ios/app/tank-timeline/id6809372688 (this page in markdown: same URL + `.md`)
- Developer: [Vadim Danilov](https://appshunter.io/developer/6798550985)
- Category: Lifestyle, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 4 MB
- Languages: American English
- Released: 2026-09-14
- Data updated: 2026-09-17
- User reviews in markdown: https://appshunter.io/ios/app/tank-timeline/id6809372688/reviews.md

## What is Tank Timeline?

Keep every aquarium's care history in one clear, private journal.

Tank Timeline helps you record raw water-test readings, schedule routine care, and review what changed over time. It works without a Tank Timeline account and keeps your journal on the device.

LOG WATER TESTS
• Record temperature, pH, ammonia, nitrite, nitrate, GH, KH, phosphate, total dissolved solids, conductivity, potassium, iron, free ammonia and ammonium
• Start with freshwater community, planted-tank or shrimp-tank presets
• Choose which readings each aquarium tracks, including your own parameters and units
• Run multiple named test timers while entering results

PLAN AQUARIUM CARE
• Schedule water changes, testing, feeding, fertilizing, filter cleaning and custom tasks
• Use daily, weekly, selected-weekday, monthly or custom repeat intervals
• Receive optional local notifications
• Review upcoming, overdue and completed maintenance in one calendar

FOLLOW THE TIMELINE
• Browse water tests and maintenance in a searchable journal
• Review parameter charts for a week or a month
• Add notes to tests and maintenance records
• Keep separate histories for multiple aquariums with Pro

YOUR DATA, YOUR CHOICE
• No Tank Timeline account
• Journal data stays local on your device
• Free JSON backup and restore, including app photo copies
• CSV export is available with Pro

FREE includes one aquarium, raw water-test logging, a month of trends, searchable history, custom parameters, test timers and JSON backup.

TANK TIMELINE PRO
Choose a monthly subscription or a one-time lifetime purchase to unlock multiple aquariums, maintenance planning and reminders, photo history, six-month and yearly trends, and CSV export.

Tank Timeline records observations only. It does not diagnose aquarium conditions, evaluate water safety, or replace test-kit instructions or advice from a qualified aquarium professional.

Privacy Policy: https://tank-timeline-legal.vercel.app/privacy-policy/
Service Terms: https://tank-timeline-legal.vercel.app/terms-of-use/
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Tank Timeline Pro Monthly | $4.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Tank Timeline Pro Lifetime | $59.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-09-14

No release notes.

## More apps by Vadim Danilov

- [VO2MAX Running Coach](https://appshunter.io/ios/app/vo2max-running-coach/id6804630105)

All apps by Vadim Danilov: https://appshunter.io/developer/6798550985

---

*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 2026-09-17.*