Tanksmith

Offline reef tank logbook

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

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 (FREE) 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. 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. Livestock list Record your corals, fish, and inverts with a photo, source, and placement notes. Free tier includes one tank, forty parameter readings, and three livestock entries per tank — plenty to evaluate whether Tanksmith fits the way you keep reef. UNLOCK TANKSMITH PRO — $9.99 ONE-TIME Multi-tank support Display, frag, and quarantine tanks all in one place. Unlimited parameter readings and livestock No caps. Log every test, track every coral. 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. 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 Pro is $9.99. Forever. No subscription nag screens, no premium tier above Pro, no consumable IAPs. 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

  • 5.0
    out of 5
    1 Ratings

Tanksmith is now free to download. Get started for free with one tank, forty parameter readings, and three livestock per tank — enough to see if Tanksmith fits the way you keep reef. Unlock Tanksmith Pro with a single $9.99 one-time purchase to get: • Unlimited tanks, readings, and livestock • Dosing analyzer — mL/day from your own consumption • Coral photo timeline + side-by-side compare • Frag lineage tracking • Tank Report PDF Already bought Tanksmith? Thank you. Pro is automatically unlocked for everyone who purchased the paid version — no action needed. Local-only. No accounts. No subscriptions. No ads.

Version 2.0

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.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    • OMAR DANIEL GRAZIANO
    Size
    • 1.4 MB
    Category
    • Utilities
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • iPad
      Requires iPadOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    Languages
    • English
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    • © 2026 Omar Graziano
  • Privacy Policy

    • More by OMAR DANIEL GRAZIANO