IntervalTimer Duo vs HIIT Timer & Trainer

IntervalTimer Duo is a simple and easy-to-use interval timer app for iPhone and iPad that runs up to 10 timers in sequence. 【Key Uses】 • HIIT (High-Intensity Interval Training) • Pomodoro Technique (work and break cycles) • Cooking timing management • Stretching and yoga routines • Study and rest cycle management 【Features】 • Run your timers back to back, automatically • Build workouts with up to 10 timers — warm up, work, rest, cool down (Premium from the third timer) • Each timer adjustable from 1 second to 60 minutes • Preset feature to save and instantly recall favorite settings (1 preset free; unlimited presets: Premium) • Share presets via link — let friends import your timer setup in one tap • Set counter to track progress toward your target sets (Premium) • Audio notifications and vibration when timers end • Live Activity shows remaining time on Lock Screen and Dynamic Island (Premium) • Customizable alert sounds (extra sounds: Premium) • Simple and intuitive interface 【Preset Sharing】 • Share your favorite timer configurations via link • Recipients can import presets with a single tap • Sync routines with your team or workout partners 【Ease of Use】 • One-tap start, pause, and reset • Quick time setting with preset buttons • Visual circular progress bars show remaining time • Second timer can be enabled/disabled as needed • Set counter tracks completed sets toward your goal 【Free & Premium】 The app is free to download and use. After installing, all premium features are unlocked for a 14-day free trial. When the trial ends, premium features require a one-time purchase (pay once, use forever) — a Universal Purchase shared between iOS and macOS. Free forever: • Two timers running alternately (1 second to 60 minutes each) • One saved preset • Basic alert sounds • Audio and vibration notifications when timers end • Circular progress bar • Preset sharing via link (sending and receiving are both free) Premium (one-time purchase, or during the free trial): • A third timer and beyond (up to 10, each with its own name and sound) • Unlimited presets • Set counter • Additional premium alert sounds • Live Activity on Lock Screen and Dynamic Island 【Compatibility】 • iPhone and iPad • Available in English, Japanese, French, German, and Spanish 【Universal Purchase】 If you own the macOS version, you can use the iOS version at no additional cost. A simple yet fully-featured interval timer app that's perfect for any timing needs. Privacy Policy: https://techback.info/interval-timer/ios/privacy-policy.html Terms of Use (EULA): https://techback.info/interval-timer/ios/terms-of-use.html

HIIT Timer & Trainer is a fast, no-nonsense interval timer for HIIT, Tabata, circuits, stretching, and anything else built around "do X seconds, rest Y seconds, repeat N times." On iPhone and Apple Watch — now with a 12-week home workout plan and a stretching plan. WORKOUT PLAN • A 12-week home plan: strength circuits, intervals and easy days, getting a little harder every few weeks. • Every move explained in plain words — no jargon, no guessing. "12 times", "each leg", "hold 30 seconds". • Strength moves wait for you to tap DONE; intervals have their own hard and easy tones and haptics. • Track your weekly weight and monthly waist alongside the plan. • Personal Plan (one-time purchase): answer six quick questions and get a plan built around your goal, your days and your time — then change any of it by hand, including knee-friendly moves. FLEXIBILITY PLAN — NEW • A second 12-week plan: daily stretching, about 15 minutes, to touch your toes again and squat deep with heels down. CIRCUITS • Comes with a ready-made Full Body circuit — try it, then build your own. • Build your own workout: named exercises, each with its own duration, repeated over rounds. • HIIT Timer & Trainer calls out every exercise — "Squats", "Plank" — so you never have to look at the screen. • Optional warm-up and cool-down phases bookend any workout, circuits and classic sets alike. LOCK SCREEN & DYNAMIC ISLAND • Your running timer lives on the Lock Screen and in the Dynamic Island: current exercise, set counter, and remaining time at a glance. iPHONE • Three things on the screen: sets, exercise duration, rest duration. Plus or minus to dial each one. Long-press +/− to auto-repeat. • Five preset slots — four built-in (8×20/10, 6×40/20, 5×1m/15, 4×3m/1m) and one fully customisable. • Audio cues that actually help: a rising-pitch tick every second, a higher beep every 5 seconds, plus a voice announcement on a configurable interval ("3 minutes 20 seconds remaining"). Off, every 10s, or every 30s. • Pause / resume / stop, with a clear "next phase" hint so you always know what's coming. • Set rest to 0 for self-paced circuits — HIIT Timer & Trainer waits for you to tap CONTINUE before the next set. • Keeps running when the screen is locked, audio coming through your speaker or headphones. • Siri and Shortcuts: say "Start a HIIT Timer & Trainer workout" — works from the Action Button too. TRACK YOUR PROGRESS • A monthly calendar marks every day you finished a workout. • Streaks, a 12-week trend chart, and 15 achievements to unlock. • Home Screen widget with your current streak and this week's workouts. • Optional daily reminder at your chosen time — it knows your streak and what's at stake. • iCloud sync: progress and achievements follow you across your devices. • Apple Health: finished sessions can be saved as HIIT workouts. Off by default. APPLE WATCH • Start, pause, and stop workouts from your wrist — no need to fish your phone out mid-set. • Workouts finished on the watch count on your iPhone calendar too. • Voice announcements over AirPods. • Haptic cues every 5 seconds and on phase transitions, so you can train without headphones and still feel the cadence. FREE, WITH TWO OPTIONAL ONE-TIME PURCHASES The timer, the built-in presets, the calendar, the Apple Watch app and reading the plans are free. No subscription, ever. Two optional one-time purchases: • Your Presets & Circuits — save your own presets and build your own circuits. • Your Training Plans — run the 12-week and stretching plans, get a plan made for you, edit it by hand. PRIVACY No accounts. No analytics. No ads. Your settings, plan and workout history live on your devices and in your own iCloud — nowhere else. Apple Health is written only if you switch it on, and never read. WHY HIIT Timer & Trainer Most workout apps want a subscription and your data. HIIT Timer & Trainer wants neither. Open it, dial in the workout — or follow the plan — hit START, train, close it.