Reusable plans
Create a workout once and select it again from your plan library. Duplicate plans when you want a variation without rebuilding from scratch.
Capabilities
Build exact intervals. Then stop thinking about the timer.
HiInterval handles the structure, transitions, cues, and record keeping so a complicated workout can feel simple while you are doing it.
Workout structure
Every phase has a job.
Warm up, work, recover, switch sides, recover between rounds, then cool down. HiInterval expands your plan into a deterministic timeline and keeps it stable through pause, resume and skip.
WorkMove
RecoverBreathe
SwitchChange side
RoundReset
Timing at every level
Set warm-up, default work, recovery, round recovery and cool-down timing, then override individual exercises where needed.
Left / right phases
Split an exercise into deterministic left and right work phases with a configurable switch interval between sides.
Round overrides
Selected rounds can differ from the default plan, making progressions and structured finishers possible without separate workouts.
Pause and skip safely
The session engine uses elapsed time rather than chained sleep timers, reducing drift and keeping pause, resume and skip behavior predictable.
Keep the screen useful
Optionally keep the display awake during training, or let the workout catch up when the app returns to the foreground.
Warm up
Know what is next before work starts.
The session view shows total progress, remaining time and the next phase without crowding the main timer.
Side-aware work
Left now. Right next.
When an exercise is split by side, the current side is explicit and the switch is part of the plan, not a mental note.
Cues and behavior
Eyes up. Phone down.
Tones or spoken cues
Choose tonal cues, spoken cues, or silence. Spoken cues can follow the device language or use English or German explicitly.
Haptics + countdown
Optional haptic cues and a final three-second countdown make phase changes easier to anticipate without staring at the screen.
Music-friendly
HiInterval can lower other audio while cues are playing, then let your music continue around the workout prompts.
History
Training records without a service account.
Completed workouts record plan name, duration, rounds and exercises. HiInterval calculates session count, total training time and streaks, lets you reuse a past workout as a new plan, and exports history as CSV.
Weekly reminders
Pick weekdays and a time. Reminders use local iOS notifications and stay on the device.
Light, dark or system
The app can follow iOS appearance or stay explicitly light or dark.
iPhone + iPad
One native SwiftUI app supports both device families, with a training layout designed to stay readable at a glance.
Early access is unrestricted. The current App Store build keeps the future purchase policy disabled so every capability above can be used without limits.