Comparison

HIIT Timer & Trainer vs PeakInterval

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

HIIT Timer & Trainer

Features
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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 +/āˆ’ to auto-repeat. • Five preset slots — four built-in (8Ɨ20/10, 6Ɨ40/20, 5Ɨ1m/15, 4Ɨ3m/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.

About

PeakInterval

Features
Read full description

PeakInterval is your focused interval timer and training companion. Start with a simple timer, or build a routine with optional Peak Plus. No account. No ads. YOUR ORIGINAL TOOLS STAY FREE • Japanese walking, HIIT, Tabata, run/walk, sprints, focus blocks and mobility • Unlimited basic custom timers with Quick Build and individual interval editing • Spoken interval names, sound cues, countdown beeps and haptics • Lock Screen Live Activities and Dynamic Island • Apple Watch companion to start, pause, skip and stop the timer on your paired iPhone • Full local workout history, lifetime minutes and day streak GO FURTHER WITH PEAK PLUS • Four progressive programs: Walking Foundations, Run / Walk Journey, Bodyweight Basics and Mobility Reset • 66 program sessions across 4–8 week plans, with completion tracking • 24 additional interval workouts for walking, running, HIIT and mobility • Daily workout variations generated locally for your selected goal, level and time • A training calendar with optional local workout reminders • Weekly workout and minutes goals, 7- and 28-day trends, effort balance and milestone badges • Circuit Studio: named exercise circuits, EMOM, boxing rounds and pyramid intervals • Favorite Plus workouts, export and import timer files, and export history as CSV MOVE AT YOUR OWN PACE Choose gentle, steady or challenging intervals. Preview programs before subscribing, repeat a week when needed and leave room for recovery. Workout suggestions are general timing templates, not medical advice or individual coaching. PRIVATE BY DESIGN Your timers, training preferences, calendar and history stay on your device. Daily variations use local rules, not a remote AI service. You control exported files and optional notification permission. Apple handles subscription purchases. OPTIONAL SUBSCRIPTIONS Peak Plus is available as a monthly or annual auto-renewing subscription. Both plans unlock the same features while active. Prices and billing periods are shown in the app before purchase. Payment is charged to your Apple Account. Subscriptions renew automatically unless canceled before renewal. Manage or cancel in your Apple Account subscription settings. Restore Purchases is available in Settings and on the Peak Plus screen. All original free features remain available without a subscription. Privacy: https://oanarinaldi.com/peakintervalprivacy.html Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Requires iOS 17 or later. Apple Watch companion requires watchOS 10 or later and a reachable paired iPhone.

Screenshots

HIIT Timer & Trainer4 screens
PeakInterval4 screens

Verdict

The call

HIIT Timer & Trainer and PeakInterval are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. HIIT Timer & Trainer sells 2 one-off in-app purchases and PeakInterval sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

HIIT Timer & Trainer ships an update every 2 days, PeakInterval every 4 days. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

ScorecardNo meaningful differences
HIIT Timer & Trainer versus PeakInterval: the parameters behind the verdict, then further details
ParameterHIIT Timer & TrainerPeakInterval
PriceFreeFree
Update frequencyEvery 2 days — betterEvery 4 days
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad, Apple Watch — betteriPhone, Apple Watch
Requires iOS17.017.0
Further details — not scored
Size3 MB5 MB
Age rating4+4+
DeveloperAnton PopovOANA RINALDI

In-app purchases

2 purchases

HIIT Timer & Trainer

One-time2
  • Unlock presets$0.99
  • Your Training Plans$2.99
2 purchases

PeakInterval

Subscriptions2
  • Peak Plus Monthly$3.991 Month
  • Peak Plus Annual$24.991 Year

Questions

Is HIIT Timer & Trainer free?
HIIT Timer & Trainer is free to download, with in-app purchases available.
Is PeakInterval free?
PeakInterval is free to download, with in-app purchases available.
Do HIIT Timer & Trainer or PeakInterval have ads?
Neither HIIT Timer & Trainer nor PeakInterval shows ads.
Which is updated more often, HIIT Timer & Trainer or PeakInterval?
HIIT Timer & Trainer ships an update every 2 days, and PeakInterval every 4 days. Most recently, HIIT Timer & Trainer was updated on October 28, 2026 and PeakInterval on October 31, 2026.

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