Tanksmith
Offline reef tank logbook
$6.99
Your tank's logbook — completely offline. Log parameters, dose smarter from your own consumption data, photograph coral growth, and share forum-ready PDFs.
Tanksmith is the offline reef tank logbook built for serious reefers — the people who test their water at 7 AM, dose 2-part by hand, and obsess over coral growth photos.
Everything happens on your device. No account. No cloud sync. No subscription. No ads. No analytics. Your tank's history is yours alone.
WHAT YOU GET
Parameter logging
Track Alkalinity, Calcium, Magnesium, Nitrate, Phosphate, Salinity, Temperature, pH, ORP, Ammonia, and Nitrite. Each reading plots against the recommended target band for your tank type — Mixed Reef, SPS-Dominant, LPS-Dominant, Softie, FOWLR, or Quarantine.
Dosing intelligence
Tanksmith analyzes your alkalinity and calcium consumption rate from your reading history and tells you exactly how many milliliters per day to dose — Randy Recipe #1, BRS 2-Part, ESV B-Ionic, Aquaforest Component 1+/2+, Tropic Marin All-For-Reef, or Red Sea Foundation A/B/C. When the trend changes, you'll see it.
Coral photo timeline + lineage
Add dated photos of every coral. Tap two thumbnails to see them side-by-side and watch growth over months. Track frag lineage: this colony was cut from that mother, and that frag went to Mike at the local club.
Tank Report PDF
Generate a clean two-page PDF of your tank's recent parameter trends, livestock roster, and equipment service status. Share it with one tap when you're asking the forum for help.
Test kit & salt batch tracking
Record your Salifert, Hanna, Red Sea, Triton, Tropic Marin, and other kits with lot numbers and expiry dates. Track which salt bucket you're using — when a batch is reported bad on the forums, you'll know if you used it.
Equipment service tracker
Skimmer cleaning, RODI cartridge changes, return pump service, powerhead maintenance — set intervals, see what's overdue at a glance.
Multi-tank support
Display, frag, and quarantine tanks all in one place.
WHY OFFLINE MATTERS
The cloud goes down. Subscriptions get more expensive. Companies pivot. Your tank doesn't care about any of that. Tanksmith puts your tank's complete history on the same device that's already in your pocket — and keeps it there.
ONE-TIME PURCHASE
$4.99. Forever. No subscription nag screens, no premium tier, no in-app purchases.
PRIVACY
Tanksmith does not collect, transmit, or share any data. There are no third-party SDKs. The only system permission requested is Photos access, and only when you choose to attach a coral photo, which is then stored on your device.
Built by reefers, for reefers.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, OMAR DANIEL GRAZIANO, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- OMAR DANIEL GRAZIANO
- Size
- 1.2 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Omar Graziano
