STAmaster 2.0 — a fresh look and a new way to train. • New 4min+ Challenge: a 14-day guided program for divers already holding 3:00. Each day pairs a short prep (relaxation, rib-cage stretching, exhale holds, meditation) with breath-holds scaled to your PB, building to a relaxed 4:00+ attempt. • Redesigned Home, Train, Progress and Profile, with one clear action for today, a weekly goal and streaks • Live heart rate and SpO2 in guided workouts when a heart rate strap or pulse oximeter is connected • Back up your training to freediver.space • New app icon • Bug fixes and performance improvements

Improved Target Hold and Table training.

• Optional freediver.space accounts with private cloud backup and restore • Experimental contraction detection using your iPhone’s motion sensors, with adjustable sensitivity and session accuracy insights • Improved personal-best tracking and more reliable session history • Clearer guest-session identification and easier access to your complete history • Refreshed home, training, and setup screens • A new STAmaster app icon and visual identity • Bug fixes and reliability improvements

• Guest Mode: Hand your phone to a training buddy and time their hold without mixing it into your own stats and PBs. Add their name, and guest sessions stay tagged separately in your history. • Interactive Timer Guide: New hands-on walkthrough teaches the core timer gestures before you ever hold your breath: tap to mark a contraction, double-tap to surface. Shows automatically for your first few sessions, and you can replay it anytime from "How the timer works."

Pulse oximeter support is here. Connect a Lepu PC-60FW for live SpO2 during every hold, with a customizable hypoxia alert. New "Your potential" card on Progress predicts your ceiling from your best CO2 tolerance and struggle endurance. Hold summaries now include full SpO2 trajectories.

- Fixed CO2 and O2 table generation, tables now produce correct hold/rest progressions for your level - Stability and reliability improvements

Timer accuracy - Rebuilt timer engine with event-driven scheduling — eliminates second-skips during long holds - Added minute-beep cues during the hold phase (STA timer and tables) so you can track duration without looking Training tables - Early hold termination: end a hold before the target and move on to rest without aborting the session - Fixed unintended milestone triggers during table rounds Heart rate monitoring - Inline Bluetooth HR device pairing directly from training setup screens - Fixed stale connection status and auto-reconnect race; added connection validation - Extracted a shared HR status component for consistent UI Stability - Fixed SwiftData migration crash for users upgrading from 1.3 (minute-beep setting default) - General polish across Plan Builder, Training Plan Detail, and Table Setup views

What's new in STAmaster 1.3: • Improved heart rate monitoring with more reliable BLE device connection • New inline HR connection helper guides you through pairing directly from training setup • Enhanced contraction metrics tracking for better session analysis • Refined real-time HR data display during breath-hold sessions • Auto-reconnect improvements for Bluetooth heart rate monitors • Bug fixes and performance improvements