Plain HIIT

SpotOnBI

Contains adsIn-app purchases

About this app

Plain HIIT — simple, effective high-intensity interval training on your phone.

No subscriptions. No account. No cloud. Everything runs on your device so you can focus on the workout, not the app.

What you get

• Ready-made workouts — Basic, Advanced, and Hard HIIT routines
• Build your own — 60+ exercises or add your own videos
• Exercise demos — short looping animations for form and muscle focus
• Weekly plan — schedule workouts with 10-minute reminders
• Streaks — hit your weekly goal (1–3 workouts) and keep it going
• Rest days & weeks — take time off without losing progress
• History — log sessions with a simple 1–5 rating
• Voice guidance — cues like “Start”, “Rest”, next exercise (works with your music)
• Screen stays on during workouts
• Languages — English, German, Swedish

Built to stay out of your way

No feed. No leaderboards. No gear. No calorie counting. No sign-up.
Just press start and train.

Ads & privacy

Free version includes a small banner and a post-workout ad.
No ads during workouts or results.

• Watch a short video for ad-free today
• Pay once to remove ads forever

Your data stays on your device: no account, no tracking, no cloud.

Who it’s for

• Fast, no-nonsense HIIT workouts
• Ages 16+ comfortable with higher intensity
• Fully offline — at home, gym, or on the go

Important

HIIT is high-intensity exercise. Consult a professional if needed.
A health disclaimer is shown on first launch and always available in Settings.

What’s new

Track your heart rate during workouts via Wear OS watch (Galaxy Watch 4+, Pixel Watch, others). Install the Plain HIIT watch app once — the phone launches it automatically when you start a workout.
- Redesigned in-workout screen: timer ring with the exercise video in the centre, live HR panel with dashed lines for your past min / median / max runs.
- Workout result screen now shows peak and average heart rate with a mini curve.
- Various polish.