# Tank Timeline: Aquarium Log — Water Tests & Care Tracker

> Water Tests & Care Tracker (iPhone/iPad app by Vadim Danilov.)

- Source: https://appshunter.io/ios/app/tank-timeline-aquarium-log/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: 2026-10-21

## What is Tank Timeline?

Log your aquarium's water tests and see how readings change over time.

Tank Timeline is a private journal for freshwater, planted and shrimp tanks. Start free with one aquarium, water-test logging, week and month charts, and JSON backup. No Tank Timeline account is required; your journal stays on your device.

LOG WATER TESTS
• Record temperature, pH, ammonia, nitrite, nitrate, GH, KH, phosphate, total dissolved solids, conductivity, potassium, iron, free ammonia and ammonium
• Choose freshwater community, planted-tank or shrimp-tank presets
• Add your own parameters and units
• Use multiple named test timers while entering results

SEE YOUR TANK'S HISTORY
• Keep water tests, care records and notes in a searchable journal
• Review a week or a month of parameter charts for free
• Use free JSON backup and restore, including app photo copies
• Import water-test records from CSV with a preview before saving

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

FREE FOR ONE AQUARIUM
Water-test logging, custom parameters, test timers, searchable history, week and month charts, JSON backup and restore, and CSV import.

TANK TIMELINE PRO
Choose a monthly subscription or a one-time lifetime purchase for 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 |


## Is Tank Timeline safe?

Not enough ratings yet to assess Tank Timeline.

## Is Tank Timeline legit?

Tank Timeline: Aquarium Log has limited verification signals. The AppsHunter Legitimacy Score for Tank Timeline is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 2 releases)

### 1.1 — 2026-10-21

Thank you for keeping your aquarium history with Tank Timeline. You may now see an optional review request after repeated use. Water-test logging, week and month charts, and JSON backups remain free for one aquarium.

### 1.0 — 2026-09-14

No release notes.

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## 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

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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 2026-10-21.*