Surge: Interval & Boxing Timer
Tabata, HIIT & Round Workouts
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
The interval timer that shows you what your heart did every round.
Big, color-coded, readable from across the gym. Voice cues over your music
with the screen locked. And after every workout: heart rate, calories, and
recovery — round by round, straight from your watch.
BUILT FOR EVERY FORMAT
• Boxing rounds, Tabata, HIIT, EMOM, AMRAP — one tap to load
• Block editor: work, rest, warm up, cool down — any structure you want
• Repeat groups: build circuits and repeat them ×2 to ×99
• Quick Start: work/rest × rounds in two taps
MADE FOR THE GYM FLOOR
• Massive countdown digits you can read from meters away
• Green means work, blue means rest — full-screen color coding
• Voice coach announces what's next; beeps count you down
• Plays over your music and keeps running with the screen locked
YOUR HEART, EVERY ROUND — WITH ANY WATCH
• Workouts saved to Apple Health automatically
• Heart rate & calories from your watch, right
• Recovery: how fast your heart rate drops between rounds — the number
coaches actually care about
• Round-over-round drift shows you when your engine fades
• Pro: the full per-round breakdown and chart
WORKS WITH ANY SMARTWATCH
• Wrist alerts at every interval — Apple Watch, Garmin, Samsung, Pixel & more
• Your watch tracks the workout; Surge cues th
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Nixes, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Health & Fitness
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Nixes EOOD
- Size
- 3 MB
- Category
- Sports
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Surge Pro $4.99
- Copyright
- © Nixes