Is this your app? Claim this page to add your own description, links and contact info. It's free. →
Version
1.3.0
Size
8.32 Mb
Updated
1 week ago
Released
01 Jul 2026
Description
Fathom is a native iPhone and iPad app for dive planning and logging. Build open- and closed-circuit decompression schedules with configurable gradient factors, then record every dive you make in the built-in logbook, and link each logged dive back to the plan that produced it.
Build single- or multi-level dive plans, manage your gas mixes and tanks, and review every parameter that goes into your decompression schedule before you get in the water. After the dive, capture depth, time, gases, tanks, buddies, locations, and tags in a logbook designed for the same workflow.
PLANNING
• Configurable gradient factors (default GF 20/85)
• Multi-level dive plans with automatic gas selection
• Full trimix and heliox support, in addition to air and nitrox
• Closed-circuit rebreather plans: fixed setpoints with a switch depth, and travel diluent for deep dives
• Open-circuit bailout schedules computed from the worst point of the dive
• Repetitive dives: tissue loading, CNS, and OTU carry across surface intervals
• Custom gas mixes and standard preset catalogue
• Tank and cylinder tracking with SAC and per-tank gas usage
• Minimum gas (rock-bottom) reserve required to bring you and your buddy back from depth
• NDL (no-decompression limit) at any depth
• MOD, END, and gas density for every level, with warnings when a mix gets too dense
• CNS clock and OTU oxygen exposure tracking
LOGBOOK
• Log every dive with depth, time, gases, tanks, location, buddies, and tags
• Link each logged dive to its original plan
• Browse and search your dive history
GENERAL
• Metric and imperial units throughout
• iCloud sync across your iPhone, iPad, and Mac
• One purchase unlocks Fathom on iPhone, iPad, and Mac
IMPORTANT
Fathom is a planning tool, not a substitute for diver training, qualified instruction, or the judgment of a certified dive professional. Always follow the procedures taught in your training agency, the limits of your certification, and your own dive computer. Decompression diving carries inherent risks.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Estimates
Availability
Devices
iPhone5s
iPadAir
iPadAirCellular
iPadMiniRetina
iPadMiniRetinaCellular
iPhone6
iPhone6Plus
iPadAir2
iPadAir2Cellular
iPadMini3
iPadMini3Cellular
iPodTouchSixthGen
iPhone6s
iPhone6sPlus
iPadMini4
iPadMini4Cellular
iPadPro
iPadProCellular
iPadPro97
iPadPro97Cellular
iPhoneSE
iPhone7
iPhone7Plus
iPad611
iPad612
iPad71
iPad72
iPad73
iPad74
iPhone8
iPhone8Plus
iPhoneX
iPad75
iPad76
iPhoneXS
iPhoneXSMax
iPhoneXR
iPad812
iPad834
iPad856
iPad878
iPadMini5
iPadMini5Cellular
iPadAir3
iPadAir3Cellular
iPodTouchSeventhGen
iPhone11
iPhone11Pro
iPadSeventhGen
iPadSeventhGenCellular
iPhone11ProMax
iPhoneSESecondGen
iPadProSecondGen
iPadProSecondGenCellular
iPadProFourthGen
iPadProFourthGenCellular
iPhone12Mini
iPhone12
iPhone12Pro
iPhone12ProMax
iPadAir4
iPadAir4Cellular
iPadEighthGen
iPadEighthGenCellular
iPadProThirdGen
iPadProThirdGenCellular
iPadProFifthGen
iPadProFifthGenCellular
iPhone13Pro
iPhone13ProMax
iPhone13Mini
iPhone13
iPadMiniSixthGen
iPadMiniSixthGenCellular
iPadNinthGen
iPadNinthGenCellular
iPhoneSEThirdGen
iPadAirFifthGen
iPadAirFifthGenCellular
iPhone14
iPhone14Plus
iPhone14Pro
iPhone14ProMax
iPadTenthGen
iPadTenthGenCellular
iPadPro11FourthGen
iPadPro11FourthGenCellular
iPadProSixthGen
iPadProSixthGenCellular
Pricing by country
| Country | Price |
|---|---|
| Canada | free |
| China | free |
| France | free |
| Germany | free |
| Italy | free |
| Netherlands | free |
| Portugal | free |
| Spain | free |
| UK | free |
| India | free |
| Japan | free |
| Korea, Republic Of | free |
| Poland | free |
| Russia | free |
| Turkey | free |
| USA | free |
| Ukraine | free |
