Your max time to surface, for every depth, before you get in.

TTS Deco plans decompression dives on your phone and builds the table you take on the dive: for each depth around your plan, the bottom time, the TTS on bailout, and the most TTS your gas allows.

Android in closed testing

iPhone to follow

CCR55 m for 20 min, setpoints 0.7 and 1.3

TTS table for the planned dive and the depths either side
Depthm	BTmin	Bailout TTSmin	Max TTSmin
49	35	52	51
52	30	49	48
55	27	47	48
58	24	45	47
61	21	41	44

One dive's TTS table. If the dive runs deeper or longer, the row for that depth gives the bottom time and the TTS your bailout gas covers.

What it plans

A TTS table for the wrist: Max TTS and minimum gas at each depth either side of your plan, the method taught on technical courses, with TTS figures you can check against your computer underwater.
Bailout from the worst point: For CCR, bailout is planned from the worst point of the profile, with its own gradient factors and a stressed breathing rate.
Air and nitrox to trimix and CCR: From a single nitrox cylinder with light stops to trimix with several deco gases, or a closed-circuit rebreather with open-circuit bailout.
Nothing leaves your phone: No account and no tracking. Plans are made and kept on the device, and the app works offline at the dive site.

Help test it

TTS Deco is in closed testing on Android. To join, email tts-deco@wjdp.uk from the Google account you use on your phone.