Comparison

Workout Timer vs SleepStack

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

Head to head
About

Workout Timer

Features
Read full description

Workout Timer · Interval Timer · Tabata Timer · Timer for Workouts · Interval Timer Free · HIIT Timer BestWorkout is the all-in-one workout timer that turns any phone into a powerful personal coach. From a quick four-minute Tabata timer to a 40-minute strength circuit, this flexible interval timer adapts to every fitness style while remaining 100% offline and ad-free. If you have ever searched for a reliable timer for workouts that works anywhere, BestWorkout is the answer—an interval timer free of paywalls yet packed with premium features. Why BestWorkout Is the Ultimate Workout Timer Fully Customisable Interval Timer • Dial in exact work, rest, and long-rest values in seconds or minutes. • Set total sets, rounds, or an open-ended stopwatch mode. • The colour-changing display and optional vibration ensure you always feel the phase change, making it perfect as a HIIT timer in noisy gyms or outdoor runs. Unlimited Bookmarks for Every Timer for Workouts • Save an endless library of routines: kettlebell sets, boxing rounds, Pilates flows, even Pomodoro study sessions. • Duplicate any workout timer and tweak one field to create progressive overload plans. PRO : Calendar and History Insights • Every completed interval timer logs to a colour-coded calendar. • Tap any day to review total work minutes, completed sets, and streak length. Interval Timer Free and Privacy-First • No accounts, no ads, no trackers: BestWorkout is a genuinely free interval timer. • Perfect for basement gyms, aeroplane cabins, or remote trails—no signal required. • Battery-optimised code lets a marathon workout timer run for hours without draining your phone. Complete Device Control • Screen wake-lock keeps digits visible until the final beep. • Haptic strength slider ranges from silent taps to strong buzzes. Multilingual Support Out of the Box • Interface and voice prompts localised in English, Español, Deutsch, Français, Português, 日本語, 한국어, Русский, Türkçe, العربية, among others. • Units switch automatically between seconds and minutes for a seamless global workout timer experience. Lightning-Fast Start-Up • A three-step intro helps you build your first interval timer in sixty seconds. • Includes a classic Tabata timer, a strength HIIT timer, and an EMOM to showcase versatility. How to Create Your Perfect Workout Timer Tap the + button in Bookmarks. Choose Single-Exercise or Multi-Exercise. Enter work seconds, rest seconds, sets or rounds, and optional long rest. Name the routine—example: “20-10 Tabata Timer ×8.” Press Save, then Start: your new interval timer begins instantly. Sample Routines to Spark Ideas • Tabata Timer: 20 s work / 10 s rest × 8 • Strength Interval Timer: 45 s lifts / 15 s rest, long rest 60 s after 5 rounds • Pyramid HIIT Timer: 30-40-50-40-30 s work with equal rest • Boxing Timer for Workouts: 3 min rounds, 1 min corner rest, repeat 12 times • Mobility Flow: 60 s stretch, 30 s rest across five poses, repeat twice Expert Tips for Interval Timer Mastery • Long-press a calendar entry to reschedule or add performance notes. • Run music in the background; phase changes still vibrate or announce quietly through headphones. Privacy Pledge Your data stays on your device—BestWorkout never sends workout history to the cloud. It requests only vibration and wake-lock permissions, keeping the interval timer free from intrusive ads or analytics. Ready to Level Up? Download BestWorkout now and transform every session with the most versatile workout timer, interval timer, Tabata timer, timer for workouts, interval timer free, and HIIT timer on the market. Set your goals, press Start, and make every second stronger. Privacy Policy: https://burnai.app/privacy-policy-workouttimer.html Terms Of Services: https://burnai.app/terms-of-services-workouttimer.html

About

SleepStack

This app helps you build better sleep habits with guided routines, sleep tracking, and relaxation techniques. It monitors your sleep environment and provides feedback to improve your rest and morning recovery. Protect your sleep from phone distractions with app blocking features.

Highlights
  • Personalized bedtime routine builder
  • Sleep Score and insights tracking
  • Guided relaxation techniques
  • App blocking for sleep protection
  • Sleep environment monitoring
  • Morning energy and recovery feedback
  • Gamified sleep habit tracking
Features
Read full description

Build a better sleep routine with SleepStack a guided sleep tracker, Sleep Score coach, and bedtime routine app designed to help you fall asleep, stay consistent, and wake up more recovered. Most sleep apps only tell you what happened last night. SleepStack helps you understand your sleep, improve your routine, and protect the habits that make better rest possible. Whether you want to fix your sleep schedule, stop late-night scrolling, fall asleep faster, improve deep sleep, or wake up with more energy, SleepStack gives you a clear protocol to follow. BUILD YOUR SLEEP ROUTINE Create a bedtime routine that fits your life. SleepStack helps you set a personalized sleep window, follow a pre-sleep checklist, and build repeatable habits around your evening routine, wake time, and recovery goals. Choose guided sleep protocols for: • Better sleep consistency • Wind-down and relaxation • Circadian rhythm support • Recovery and deep sleep • Phone-free bedtime discipline • Morning energy and routine tracking Every protocol gives you structure, not guesswork. TRACK YOUR SLEEP SCORE Understand how well you slept — and why. SleepStack turns your sleep data into a simple nightly Sleep Score, helping you see what is improving your sleep and what may be disrupting it. Track key sleep insights including: • Sleep duration • Sleep efficiency • Sleep regularity • Deep sleep • REM sleep • HRV • Respiratory rate • Phone pickups • Sleep schedule consistency • Morning check-ins Connect with Apple Health to bring your sleep stages, HRV, and respiratory data into one clear sleep dashboard. FALL ASLEEP WITH GUIDED TECHNIQUES For nights when your mind will not slow down, SleepStack gives you guided relaxation tools built for bedtime. Try techniques such as: • 4-7-8 breathing • Box breathing • Physiological sigh • Progressive muscle relaxation • Cognitive Shuffle • Military Method PMR Each technique includes step-by-step guidance, timed visuals, and audio cues so you can follow along without overthinking. PROTECT YOUR SLEEP FROM YOUR PHONE Late-night scrolling can destroy a good sleep routine. SleepStack’s Shield feature helps you protect your sleep window by blocking distracting apps during bedtime hours. Track bypass attempts, unlocks, and phone pickups so you can see how your screen habits affect your sleep discipline. Put the phone down. Protect your routine. Sleep better. MONITOR YOUR SLEEP ENVIRONMENT Your bedroom matters. SleepStack’s Sanctuary feature monitors your sleep environment and helps you identify noise spikes that may interrupt your rest. Use real-time sound feedback to create a quieter, more sleep-friendly room. WAKE UP WITH BETTER FEEDBACK SleepStack connects how you went to bed with how you woke up. Log your morning energy, glow, puffiness, and recovery so you can understand which routines actually help you feel better the next day. STAY CONSISTENT WITH GAMIFIED SLEEP HABITS Better sleep is built night by night. SleepStack includes achievements, streaks, challenges, and habit tracking to help you stay motivated. Build consistency across your bedtime routine, sleep duration, morning check-ins, environment, and phone discipline. WHO SLEEPSTACK IS FOR SleepStack is built for people who want more than a basic sleep tracker. Use SleepStack if you want to: • Build a better bedtime routine • Improve your sleep schedule • Track your Sleep Score • Fall asleep with guided techniques • Reduce phone use at night • Monitor deep sleep, REM, HRV, and recovery • Create a consistent wind-down routine • Wake up with more energy • Understand what helps and hurts your sleep SleepStack gives you the tools, structure, and feedback loop to make better sleep feel practical. Your better sleep routine starts tonight. Terms of Service: https://sleepmaxertermsofuse.hrdb8phm6h.workers.dev Privacy Policy: https://sleepmaxerprivacypolicy.hrdb8phm6h.workers.dev

Screenshots

Workout Timer4 screens
SleepStack4 screens

Verdict

The call

The clearest difference is device support: Workout Timer at 3 against SleepStack's 1. Workout Timer also leads on iOS requirement (12.0 vs 18.0). On price, ads and in-app purchases there is nothing between them.

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Workout Timer sells 2 in-app purchases, starting at $3.99 per 7 days and SleepStack sells 3 in-app purchases, starting at $9.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Scorecard2 real differences · 7 level
Workout Timer versus SleepStack: the parameters behind the verdict, then further details
ParameterWorkout TimerSleepStack
PriceFreeFree
Rating—4.0 (4 ratings) — better
Number of ratings—4 — better
Update frequency—Every 10 days
AdsNoNo
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS12.0 — better18.0
Further details — not scored
Size52 MB49 MB
Age rating4+4+
DeveloperAhmet Yagız SarıdoganNUNE LLC

In-app purchases

2 purchases

Workout Timer

Subscriptions2
  • Premium Weekly3 Days trial$3.997 Days
  • Premium Yearly$14.991 Year
3 purchases

SleepStack

Subscriptions3
  • SleepMaxer Pro weekly$9.997 Days
  • SleepMaxer Pro Yearly3 Days trial$49.991 Year
  • SleepStack Yearly1 Year trial$59.991 Year

Questions

Is Workout Timer free?
Workout Timer is free to download, with in-app purchases available.
Is SleepStack free?
SleepStack is free to download, with in-app purchases available.
Do Workout Timer or SleepStack have ads?
Neither Workout Timer nor SleepStack shows ads.

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