AquaTrackr vs TankDiary
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AquaTrackr
Read full descriptionHide full description
Never forget a water change again. AquaTrackr helps you stay on top of your aquarium — without the stress of forgetting or second-guessing. “Wait… when was the last water change?” “I should probably do it soon…” Sound familiar? AquaTrackr keeps everything organized, so you always know what to do next. --- 【Core Features】 ■ Never miss a water change • Automatically track days since your last change • Clear timing for your next maintenance • Get reminders right when you need them ■ Keep all records in one place • Log temperature, feeding, and water changes • View everything clearly in a calendar ■ Capture growth over time • Save photos of your aquarium • Easily look back and track changes ■ Prevent mistakes • Built-in maintenance checklist • Customize your own steps • Never miss important tasks again ■ Share with confidence • Share your aquarium with family or friends • Let others manage with the same information --- 【Who it's for】 • Anyone who forgets water changes • Aquarists who want clean, simple logs • Families or teams managing tanks together • People who want to track growth with photos --- Simple. Clean. Easy to use. From beginners to experienced aquarists. Make aquarium management easier with AquaTrackr. --- 【Subscription】 • Aquarium Pro (monthly) • Automatically renews every month Unlock Pro to get: • More tanks • More photo storage • More shared members • Long-term temperature graphs (3, 6, 12 months) • CSV export of your records • Payment is charged to your Apple ID • Subscription renews automatically • Cancel anytime in Settings → Apple ID → Subscriptions Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://Juman777499.github.io/app-legal1/aquarium%20App%20privacy.html
TankDiary
Read full descriptionHide full description
Track your aquarium's water quality and never miss a maintenance day. Simple, focused, and built for every type of tank — freshwater, planted, saltwater, or outdoor. 【Log Your Water Quality】 Record pH, temperature, GH, KH, ammonia, nitrite, and nitrate. Add up to 5 custom parameters. Your last reading is shown as a hint while you type, so entry is fast. 【Visualize Trends】 See parameters on a clean graph over 7, 30, 90 days, or all time — with the ideal range highlighted so you can spot problems at a glance. (30-day+ graphs require Pro) 【Maintenance Reminders】 Set repeating tasks for water changes, feeding, fertilizing, filter cleaning, CO2 refills, and more. The home screen shows "next maintenance in X days" for every tank. 【Reagent Timer】 Built-in 2, 5, and 10-minute countdowns — no more guessing when your test kit is ready. 【CSV / ZIP Export & Import — Free】 Export water records as CSV, or back up tanks, photos, logs, and schedules as a ZIP. Import the same files anytime — free for everyone. 【TankDiary Pro — One-Time Purchase】 • Register more than one tank • View graphs beyond 7 days (30 / 90 / all-time) No subscription. No recurring fees. Ever. 【Perfect for every tank】 Freshwater, planted, reef, goldfish, shrimp, outdoor ponds — TankDiary works with any setup. Especially useful if you've ever: • Lost fish from a missed water change • Struggled to keep water parameters stable • Wanted an easier alternative to spreadsheets • Been managing multiple tanks (Corydoras, guppies, discus, goldfish, cichlids, shrimp...) 【Your data stays with you】 All records are stored on your iPhone or iPad. No cloud sync. No account required. 【No special hardware needed】 Works with any test kit or test strips. Just enter your readings manually. 【Pricing】 • Free: 1 tank, 7-day graphs, CSV/ZIP export & import, core features — free forever • TankDiary Pro (one-time, no subscription): multiple tanks, long-term graphs --- Developer: Kore Apps Support: support@kore-apps.com ---
Screenshots
Verdict
The clearest difference is iOS requirement: TankDiary at 15.0 against AquaTrackr's 26.1. On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. AquaTrackr sells 1 in-app purchase, starting at $2.99 per month and TankDiary sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Both ship on a similar rhythm, roughly every 3 days. The most recent releases landed on November 5, 2026 and November 9, 2026 respectively.
| Parameter | AquaTrackr | TankDiary |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 days | Every 3 days |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 26.1 | 15.0 — better |
| Further details — not scored | ||
| Size | 15 MB | 54 MB |
| Age rating | 4+ | 4+ |
| Developer | Juman Shota | kazuki korenori |
In-app purchases
AquaTrackr
- Aquarium Pro7 Days trial$2.991 Month
TankDiary
- TankDiary Pro$5.99








