38°F
Cold plunge
Ice bath, plunge tank, cold shower
Set the water temp, run the timer, rate how it felt while it's still fresh.
- Water temperature, °F or °C
- Time under, to the second
- 1–5 felt rating with notes
▚ Cold · Heat · Contrast
Your ring tracks recovery. Kalta tracks the protocol — water temp, time under, how it actually felt — so you can see what's working instead of guessing.
Free · iOS
▚ Three modalities, one log
A generic workout app can't tell a 40-degree plunge from a 45-degree one, and that difference is the whole point. Kalta logs each modality on its own terms.
Set the water temp, run the timer, rate how it felt while it's still fresh.
Log heat sessions the same way, so your weekly heat load is a number instead of a vibe.
Contrast therapy is a sequence, not a single number. Kalta records it as one session.
▚ In the app
Logging takes about ten seconds. The rest of the app exists to make you want to come back tomorrow.
Start it, put your phone down, get in. Kalta's timer runs off the wall clock, so backgrounding the app, locking your screen, or taking a call won't cost you a second.
Daily and monthly targets, a week strip that fills in as you go, and personal bests worth chasing.
Longest hold, coldest water, best week — tracked without you asking.
One nudge, at a time you pick. Turn it off in a tap when you don't want it.
Works like an app on iOS and Android. No install, no store, no waiting.
▚ Where we draw the line
Plenty of wellness apps will hand you a "recovery score" after two sessions. Kalta won't. Insights stay locked until there's enough of your own history behind them to mean something — and when they do appear, they're describing what you actually did.
It's a smaller promise than the competition makes. It's also one we can keep.
Cold sessions tend to run longer on the days you log a sauna first — across 28 sessions in the last 8 weeks.
▚ Pricing
Session logging, history, stats, streaks, and goals — all of it, no paywall, no trial period.
▚ Questions
No. A stock tank, a chest freezer, a bathtub with ice, or a cold shower all log the same way. Kalta cares about the temperature and the time, not what you're sitting in.
Not right now. Kalta focuses on what your wearable can't see — the protocol itself. Your ring already handles recovery and HRV well; this is for the part in between.
The logging tier is permanently free. Session tracking, history, stats, streaks, and goals will not move behind a paywall. Anything paid later will be genuinely additional — sync, correlation, saved protocols.
Yes — Kalta is available on the App Store. It runs natively, keeps your timer accurate in the background, and sends daily reminders straight from your lock screen.
Only you. Every record is scoped to your account at the database level, and there's no feed, no leaderboard, and nothing public by default.
Yes. Toggle between °F and °C anywhere you enter a temperature, and history displays in whichever you prefer.
▚ Keeping it free
Kalta doesn't run ads and never will sell your data. If it's useful to your practice and you want to chip in toward hosting and development, that's genuinely appreciated — but never expected.
Every coffee goes straight back into keeping Kalta running and ad-free for everyone logging a session today.
Buy Kalta a coffeeMight as well know what it did for you.