# SquareWave: HIIT Timer — Work high. Rest low.

> Work high. Rest low. (iPhone/iPad app by XYK LLC.)

- Source: https://appshunter.io/ios/app/squarewave-hiit-timer/id6788647971 (this page in markdown: same URL + `.md`)
- Developer: [XYK LLC](https://appshunter.io/developer/1861941308)
- Category: Health & Fitness
- Price: Free
- Age rating: 4+
- Requires: iOS 26.0 · 3 MB
- Languages: American English
- Released: 2026-07-14
- Data updated: 2026-08-30
- User reviews in markdown: https://appshunter.io/ios/app/squarewave-hiit-timer/id6788647971/reviews.md

## What is SquareWave?

Square Wave is a focused, private interval timer for HIIT, Tabata, circuits, stretching, study sessions, and any routine built around work and rest.

SET YOUR TIMER
• Choose work and rest durations
• Configure sets, rounds, and round breaks
• Save favorite timer presets for quick reuse
• See the total session time before you start

FOLLOW THE WAVE
Work is the high line. Rest is the low line. The live square wave makes the entire interval pattern easy to understand at a glance.

• Large, readable countdowns
• Pause or skip forward and back with one tap
• Clear countdown, transition, and halfway cues
• Optional sound and haptic feedback
• Continues when the screen is locked

APPLE WATCH
Bring Square Wave to your wrist with the included Apple Watch app.

• Start timers from presets synced with iPhone
• Hear audio cues and feel haptic taps at each interval
• Keep timing active when your wrist is down with workout support
• Save completed workouts to Health and sync sessions back to iPhone

MUSIC FRIENDLY
Timer cues mix with Spotify and other audio instead of stopping your music.

PRIVATE BY DESIGN
No ads. No accounts. No subscriptions. No tracking. Square Wave works offline, and your saved timers stay on your device.


## Version history (last 5 releases)

### 2.1.1 — 2026-08-07

SquareWave now appears without a space under the app icon on your Home Screen.

Your saved timers, completed sessions, privacy, and Apple Watch experience remain unchanged.

### 2.1.0 — 2026-07-25

Square Wave comes to Apple Watch.

• Start and control interval workouts from your wrist
• Hear the same countdown, transition, halfway, and finish cues as on iPhone
• Get matching haptic feedback at each interval
• Keep sessions active when your wrist is down with Apple Watch workout support
• Sync saved timers and completed sessions between iPhone and Apple Watch

As always: no ads, accounts, subscriptions, or tracking.

### 2.0.1 — 2026-07-21

Square Wave 2.0.1 keeps the app focused on the interval timer:

• Streamlines the app to the timer-only experience
• Timer cues now mix with Spotify and other audio without stopping playback
• Improves audio-session reliability
• Keeps the timer free, offline, and private

### 2.0 — 2026-07-17

Square Wave 2.0 adds:
• A custom workout builder with timed and rep-based exercises
• A redesigned player for multi-round workouts
• Local workout history and weekly consistency tracking
• Front and back muscle maps showing recently trained areas
• Exercise form cues and muscle-focus details
• Timer cues now mix with Spotify and other audio without stopping playback
• The iPhone status bar now stays visible during workouts

Everything remains free, offline, and private—no accounts, ads, subscriptions, or tracking.

### 1.0 — 2026-07-14

No release notes.

## More apps by XYK LLC

- [AncestryScan: Face Heritage](https://appshunter.io/ios/app/ancestryscan-face-heritage/id6756631707)
- [TEN45: Work Break Timer](https://appshunter.io/ios/app/ten45-work-break-timer/id6763495737)
- [GlizzyScan: Calorie Tracker](https://appshunter.io/ios/app/glizzyscan-calorie-tracker/id6795082119)
- [Syntheremin: Theremin Synth](https://appshunter.io/ios/app/syntheremin-theremin-synth/id6797868601)
- [Pickems: Football Picks](https://appshunter.io/ios/app/pickems-football-picks/id6798579773)

All apps by XYK LLC: https://appshunter.io/developer/1861941308

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-30.*