Reef Tank Log Downloads & RevenueReef Tank Log: Water Tracker · App Store
Not in any tracked top chart right now.
Updated 9 Nov 2026 · rankings refresh through the day
Developerhiroki kawamura
CategoryLifestyle
PriceFree
Released
Rating★ 4.5 (2)
Version1.1.1
Age rating4+
First seen by us
12 Oct 2026
12 Oct 2026Reef Tank Log: Water Tracker update history & changes
Last change · 7 events since 14 Jul 2026Full timeline ↓📦Updated to version 1.1.2📦Updated to version 1.1.1🆕First spotted by AppInsider🆕Its developer released another app: Critical Thinking Trainer
Full timeline · 7 events
- 📦Reef Tank Log: Water Tracker updated to version 1.1.2【最新アップデート項目】
■ 使いやすさの改善
- 細かな改善と動作の安定化を行いました
引き続き「リーフタンクログ」をよろしくお願いします！
ご要望や不具合のご報告は、設定の「お問い合わせ」からお気軽にお送りください。 - 📦Reef Tank Log: Water Tracker updated to version 1.1.1【最新アップデート項目】
■ プラン表示の改善
- アップグレード画面を無料版とProの比較表に刷新し、各プランでできることがひと目で分かるようにしました
- 買い切りプランを選ぶと、一度きりの購入で自動更新がないことがはっきり表示されるようになりました
- 初回起動時の広告の読み込みを改善しました
引き続き「リーフタンクログ」をよろしくお願いします！
ご要望や不具合のご報告は、設定の「お問い合わせ」からお気軽にお送りください。 - 🆕Reef Tank Log: Water Tracker first spotted by AppInsiderJapan (found via developer)
- 🆕Reef Tank Log: Water Tracker: its developer released another app: Critical Thinking Trainer
- 🆕Reef Tank Log: Water Tracker: its developer released another app: Decibel Meter: dB Noise Check
- 📦Reef Tank Log: Water Tracker version 1.1Faster logging and clearer charts.
• Redesigned entry sheet — tap a number to type it directly, or use +/- for fine adjustments. Your last reading appears as a hint, so you only fill in what you actually tested.
• Log additives in the same sheet — add multiple doses and save them together with your parameters.
• Charts now scroll horizontally as your history grows. Tap any point to pin its details, or press and hold to slide through readings without the chart scrolling away.
• Home screen now shows your recent entries and mini trend charts at a glance.
• Refreshed navigation throughout the app.… more - 🆕Reef Tank Log: Water Tracker released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Rating
4.5 ★
2 ratings
Measured
Reef Tank Log: Water Tracker on the App Store
App details
App ID
6790111056
Publisher
hiroki kawamura
On the store since
Jul 2026
Under a year
Minimum OS
iOS 15.0+
iPhone 6s and later
Devices
iPhone · iPad
Content rating
4+
Languages
2
EN JA
Size
48 MB
Also listed in
Utilities
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Not charting right now. | ||
Ratings
App Store, worldwide.
Rating
4.5 ★
2 ratings
Measured
Ratings
2
Measured
Review momentum
ⓘ How we measure thisNew ratings a week
under 1
4-week average
Lifetime rating
4.5★
recent stars not readable yet: new ratings are a tiny share of the total
Review momentum
20/100
faster than 0% of Lifestyle apps
Review momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
About Reef Tank Log: Water Tracker
Reef Tank Log is the water parameter tracker built for reef keepers who run more than one tank.
◆ Multi-Tank Management — the core
・Create a profile for every tank: name, volume, and type (SPS / LPS / mixed)
・Switch the active tank in one tap — the current tank is always visible in the header
・Overlay the same parameter across tanks on a single comparison chart (Pro)
◆ 8 Water Parameters — logged your way
・Alkalinity (dKH), calcium, magnesium, nitrate, phosphate, salinity, temperature, pH
・Log only what you tested — no field is mandatory, matching real testing routines
・Soft warnings catch obvious typos without ever blocking a save
◆ Trend Charts — catch the drift before the crash
・Every entry feeds an automatic time-series chart per parameter
・Range bands show where readings sit against tank-type presets
・"In range / out of range" at a glance right after saving, and on the home summary
◆ Dosing Log (Pro)
・Record additive brand, amount, unit, and date with quick suggestions
・Doses appear on the same timeline as your parameter charts, so you can see what moved the numbers
◆ Export & Sync (Pro)
・CSV / PDF export of any tank's full history
・iCloud sync keeps every device up to date via your Apple ID
◆ Private by design
・All data stays on your device — no account, no sign-up
・Optional iCloud sync (Pro) uses only your Apple ID. No new account, ever
【Pro】(in-app purchase — auto-renewing subscription or one-time Lifetime unlock)
Pro unlocks unlimited tanks, full-history trends, the tank comparison view, the dosing log, CSV/PDF export, and iCloud sync.
Plans: monthly or yearly (the yearly plan includes a 7-day free trial), or a one-time Lifetime purchase that keeps Pro forever. Payment is charged to your Apple ID account. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period; manage or cancel anytime in your Apple ID subscription settings. The Lifetime unlock is a single payment with no auto-renewal.
Free plan: 1 tank, unlimited parameter logging, and the last 30 days of trend history.
Privacy Policy: https://hecuhecu.github.io/apps/reef-tank-log/privacy/
Terms of Use: https://hecuhecu.github.io/apps/reef-tank-log/terms/
EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Legal Notice: https://hecuhecu.github.io/apps/reef-tank-log/tokushoho/
◆ Multi-Tank Management — the core
・Create a profile for every tank: name, volume, and type (SPS / LPS / mixed)
・Switch the active tank in one tap — the current tank is always visible in the header
・Overlay the same parameter across tanks on a single comparison chart (Pro)
◆ 8 Water Parameters — logged your way
・Alkalinity (dKH), calcium, magnesium, nitrate, phosphate, salinity, temperature, pH
・Log only what you tested — no field is mandatory, matching real testing routines
・Soft warnings catch obvious typos without ever blocking a save
◆ Trend Charts — catch the drift before the crash
・Every entry feeds an automatic time-series chart per parameter
・Range bands show where readings sit against tank-type presets
・"In range / out of range" at a glance right after saving, and on the home summary
◆ Dosing Log (Pro)
・Record additive brand, amount, unit, and date with quick suggestions
・Doses appear on the same timeline as your parameter charts, so you can see what moved the numbers
◆ Export & Sync (Pro)
・CSV / PDF export of any tank's full history
・iCloud sync keeps every device up to date via your Apple ID
◆ Private by design
・All data stays on your device — no account, no sign-up
・Optional iCloud sync (Pro) uses only your Apple ID. No new account, ever
【Pro】(in-app purchase — auto-renewing subscription or one-time Lifetime unlock)
Pro unlocks unlimited tanks, full-history trends, the tank comparison view, the dosing log, CSV/PDF export, and iCloud sync.
Plans: monthly or yearly (the yearly plan includes a 7-day free trial), or a one-time Lifetime purchase that keeps Pro forever. Payment is charged to your Apple ID account. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period; manage or cancel anytime in your Apple ID subscription settings. The Lifetime unlock is a single payment with no auto-renewal.
Free plan: 1 tank, unlimited parameter logging, and the last 30 days of trend history.
Privacy Policy: https://hecuhecu.github.io/apps/reef-tank-log/privacy/
Terms of Use: https://hecuhecu.github.io/apps/reef-tank-log/terms/
EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Legal Notice: https://hecuhecu.github.io/apps/reef-tank-log/tokushoho/
Latest updates
1.1.2
【最新アップデート項目】
■ 使いやすさの改善
- 細かな改善と動作の安定化を行いました
引き続き「リーフタンクログ」をよろしくお願いします！
ご要望や不具合のご報告は、設定の「お問い合わせ」からお気軽にお送りください。
1.1.1
【最新アップデート項目】
■ プラン表示の改善
- アップグレード画面を無料版とProの比較表に刷新し、各プランでできることがひと目で分かるようにしました
- 買い切りプランを選ぶと、一度きりの購入で自動更新がないことがはっきり表示されるようになりました
- 初回起動時の広告の読み込みを改善しました
引き続き「リーフタンクログ」をよろしくお願いします！
ご要望や不具合のご報告は、設定の「お問い合わせ」からお気軽にお送りください。
1.1
Faster logging and clearer charts.
• Redesigned entry sheet — tap a number to type it directly, or use +/- for fine adjustments. Your last reading appears as a hint, so you only fill in what you actually tested.
• Log additives in the same sheet — add multiple doses and save them together with your parameters.
• Charts now scroll horizontally as your history grows. Tap any point to pin its details, or press and hold to slide through readings without the chart scrolling away.
• Home screen now shows your recent entries and mini trend charts at a glance.
• Refreshed navigation throughout the app.
