Surge.
An interval timer built for the way you actually train.
Surge is an interval timer for HIIT, Tabata, boxing rounds, EMOM and any circuit-style workout — at home, in the gym or ringside. Set your work and rest, pick your rounds and press play — Surge calls every phase with beeps and haptics, so you train bell to bell without watching the clock.
Download size
No bloat, and we mean it literally
The entire timer is under a megabyte — smaller than one photo on your phone. No ads, no account and no data collection, so nothing ships that is not the timer.
Features
What Surge does
Rounds ready to go
Tabata 20/10 × 8, HIIT 40/20 × 10, Boxing 3:00/1:00 × 6, EMOM 60s × 10 and Stretch 30/10 × 12 — all built in, and every one editable to match your training.
Your workout, your rules
Work from 5 seconds to 10 minutes, rest up to 5 minutes, 1–50 rounds with an optional preparation countdown — and save up to 20 presets with custom names and icons.
Built to be glanceable
A large, glanceable countdown with an animated progress ring — one look tells you where you are in the round.
Cues you don’t have to look for
Audio countdown beeps and haptic feedback on every phase change, so you can keep your eyes off the screen.
The screen stays awake
Skip a phase mid-workout, and the screen stays lit to the final bell — no lock-outs halfway through a round.
Nothing to sign up for
No account, no ads, no data collection. Your presets stay on your device.
The promise
How every averyio app works
No bloat
Megabytes, not gigabytes. No frameworks bolted on, no ad libraries, no analytics SDK phoning home — nothing ships that has not earned its place.
No subscriptions
One price, paid once — no monthly fee, no in-app purchases, nothing that quietly renews. What you buy is yours to keep.
No ads, ever
Not a banner, not an interstitial, not a “watch this to continue”. You are the customer, never the product.
Private by design
Privacy is the default here, not a setting you have to go and find. No account to create, no analytics, and nothing sold to anyone — and where an app uses iCloud, it is your own private iCloud, a database we cannot read.
FAQ
Surge questions, answered
What workouts does it suit?
Anything built on rounds. The presets cover Tabata, HIIT, boxing, EMOM and stretching, and you can set your own work, rest and round count for any other circuit-style session.
Does the screen stay on?
Yes. The screen stays awake during workouts, so you never lose the count mid-round.
Is there a subscription or in-app purchases?
No. Surge is a one-time purchase — pay once and every preset and feature is included, forever. No subscriptions, no in-app purchases, no ads.
Does Surge collect my data?
No. There is no account, no tracking and no ads, and your presets never leave your device. The full detail is in the Surge privacy policy.
Does it work on iPad?
Yes — Surge is universal. One app, one purchase, iPhone and iPad.
Get Surge
Pay once and it’s yours — no ads, no subscriptions. The same promise behind every averyio app.