# Altaflip: Sauna & Cold Tracker — Sweat Loss & Hydration Coach

> Sweat Loss & Hydration Coach (iPhone/iPad app by Zen Zero Pty Ltd.)

- Source: https://appshunter.io/ios/app/altaflip-sauna-and-cold-tracker/id6756031717 (this page in markdown: same URL + `.md`)
- Developer: [Zen Zero Pty Ltd](https://appshunter.io/developer/1803788845)
- Category: Health & Fitness, Lifestyle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.1 · 58 MB
- Languages: English
- Released: 2026-02-03
- Data updated: 2026-06-18
- User reviews in markdown: https://appshunter.io/ios/app/altaflip-sauna-and-cold-tracker/id6756031717/reviews.md

## What is Altaflip?

Finally, a sauna app that does more than just track time.

Altaflip calculates your sweat loss and tells you exactly how much water to drink after each session. Using research from Finnish sauna studies and peer-reviewed thermoregulation science, the app accounts for body weight, session duration, temperature, and bench level.

SWEAT LOSS & HYDRATION

Estimates your fluid loss based on body metrics, sauna type (traditional, infrared, steam), duration with sweat onset modeling, bench position, and heat acclimatization. Then calculates how much to drink, including electrolyte recommendations for longer sessions.

BENCH LEVEL INTELLIGENCE

Upper bench can be 20 degrees Celsius hotter than lower bench. Select your position and get adjusted calculations.

SAUNA, COLD PLUNGE & CONTRAST THERAPY

Sauna: Traditional, infrared, or steam with temperature and bench level
Cold: Ice bath, cold plunge, cold shower, or outdoor swimming with cold dose tracking
Contrast: Alternating hot and cold rounds tracked as a unified practice

RESEARCH-BASED PROTOCOLS

Built-in protocols from published studies: Finnish Longevity (KIHD cohort, 40% lower all-cause mortality at 4-7 sessions/week), Deliberate Heat, Cold Exposure (Soberg protocol), and Contrast Therapy. Set weekly targets and track compliance.

APPLE HEALTH INTEGRATION

Sessions sync to Apple Health as workouts. Hydration syncs bidirectionally. Heart rate data from BLE monitors flows into Apple Health automatically.

HEART RATE ANALYTICS

Connect any standard Bluetooth heart rate monitor (Polar, Garmin, Wahoo, CooSpo, Scosche) for live HR during sessions. Post-session analytics include estimated calorie burn, thermal load scoring (TRIMP), cold shock response tracking, and heat acclimatization trends. Insights tab shows adaptation charts over time.

HEALTH BENEFITS TRACKING

Five-tier adaptation model (Building to Elite) scores your weekly practice against published research thresholds. Track adaptation timelines for both heat and cold.

SESSION TIMER

Timestamp-based timer that stays accurate when backgrounded or closed. Recovers automatically if interrupted.

DAILY HYDRATION TRACKING

Daily goal adjusts based on body weight plus session deficits. Visual progress ring, quick-add buttons, and weekly trends.

SHARE YOUR ACHIEVEMENTS

Generate styled session cards with stats, sweat loss, and protocol progress. Share to social media or save to camera roll.

SMART NOTIFICATIONS

Session reminders, streak protection, protocol nudges, and post-session hydration reminders. All optional.

WORKS OFFLINE

All data stored locally. No account required.

OPTIONAL CLOUD BACKUP

Sign in with Google or Apple to back up and restore across devices.

FREE FEATURES

Session logging, sweat estimates, basic streaks, session timer, history, one protocol, social sharing

PREMIUM UNLOCKS

Multiple protocols, contrast tracking, hydration tracking, detailed trends, health benefits, heart rate analytics, Apple Health sync, cloud backup, hydration reminders, screen dimming

Start with a 14-day free trial of all premium features.

Terms of use - https://www.altaflip.com/terms-of-service

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Premium Monthly | $4.99 | per month |
| Premium Yearly | $29.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Premium Lifetime | $79.99 | one-time |



## Version history (last 3 releases)

### 1.0.11 — 2026-04-23

Improved: Full Session History
- Sessions tab now shows your full history, not just the last 30 days.
- New "Show older sessions" button at the bottom loads more in pages of 50 so the list stays fast.

Improved: Sauna & Cold Types at a Glance
- Each sauna subtype now has its own icon and colour in the history list — flame for Traditional, sun for Infrared, cloud for Steam Room.
- Cold sessions do the same — snowflake for Plunge, showerhead for Cold Shower, pool for Outdoor Dip.
- Labels updated to match (e.g. "Traditional Sauna", "Steam Room", "Cold Shower").

New: Edit Session Duration
- Forgot to stop the timer? You can now adjust a session's duration from the session detail screen.
- Sweat loss and hydration estimates recalculate automatically when you change the duration.
- Available for sauna and cold sessions (contrast sessions still use per-phase durations).

New: Live Activities (iOS)
- Your active session now shows on the lock screen and Dynamic Island — glance without unlocking to see elapsed time, phase, and live heart rate.
- The timer ticks natively even when the screen is locked, so elapsed time is always accurate without draining the battery.
- Live heart rate updates when a Bluetooth monitor is paired.
- Contrast sessions show the current phase (Hot / Cold) and round counter.
- Pause or resume from inside the app and the lock screen reflects it instantly.
- Tap the Live Activity to jump straight back to your session.

### 1.0.1 — 2026-02-10

New Feature: Log Past Sessions
- Forgot your phone or want to backfill your history? Now you can log sessions retroactively with full details — date, time, duration, temperature, and more.
- Access via "Log Past Session" on the session start screen or the "+" button on the Sessions tab.
- Past sessions are saved with the same calculations (sweat loss, hydration, protocol progress) as live sessions.
- Contrast therapy logging supported (premium).
Plus:
- Clearer trial experience: We now explain exactly what happens when your free trial ends — premium features simply turn off, no surprise charges.

### 1.0 — 2026-02-04

No release notes.

## More apps by Zen Zero Pty Ltd

- [Tickmeek](https://appshunter.io/ios/app/tickmeek/id6743649903)
- [Dream Journal - Dreamlusive](https://appshunter.io/ios/app/dream-journal-dreamlusive/id6753315857)

All apps by Zen Zero Pty Ltd: https://appshunter.io/developer/1803788845

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-18.*