Comparison

Imperfect vs SleepStack

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

Head to head
About

Imperfect

This app creates personalized training and wellness plans that adapt to your unique life circumstances, from weather to social events. It offers actionable recommendations, including nutrition and recovery advice, to help you achieve your fitness goals.

Highlights
  • Adaptive training programs
  • Actionable recommendations
  • Weather-aware planning
  • Nutrition and recovery advice
  • Integration with fitness wearables
  • Personalized wellness journey
Features
Read full description

Imperfect is a training coach for runners, cyclists, and triathletes. It's built for the imperfect ones: athletes with a job, kids, a trip next week, a night of bad sleep here and there, and a goal they still mean to hit. Pros never have to sort out their training alone: someone rebuilds their week every time a cold, a work trip, or a sore calf gets in the way. Imperfect gives you that coach. Tell your coach what you're working toward, whether it's a first 10K, a century ride, or a long-course triathlon, and together you land on a goal that fits you and a plan to get there. A rough week changes the plan and leaves the goal alone, with no guilt and no starting over. And when what you want to do and what your body can do don't match, your coach says so. What that looks like: • Checks the forecast before sending you out on a long ride into a thunderstorm • Reworks your week after you stay up late at a friend's wedding • Tells you how many tacos it takes to hit your protein after a long run • Suggests a power nap at the right time of day when you're running on fumes • Builds your training around your yoga and physical therapy • Makes room for a new baby or a puppy Your plan works with or without a watch. Connect Apple Health and your coach also sees how you slept and what you actually did, whatever watch or band you wear.

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

Imperfect4 screens
SleepStack4 screens

Verdict

The call

The clearest difference is in-app purchases: Imperfect at none against SleepStack's 3. Imperfect also leads on update cadence (every 3 days vs every 10 days) and rating (4.2 vs 4.0). On price, ads and device support 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. SleepStack sells 3 in-app purchases, starting at $4.99 per 7 days. Imperfect asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Imperfect holds the better App Store score, 4.2 against 4.0. That said, the two scores are not equally well evidenced: Imperfect has 27 ratings behind it against 4, so its average is the more settled of the two.

UpkeepUpdate frequency

Imperfect ships an update every 3 days, SleepStack every 10 days. The most recent releases landed on October 12, 2026 and October 3, 2026 respectively.

Scorecard6 real differences · 4 level
Imperfect versus SleepStack: the parameters behind the verdict, then further details
ParameterImperfectSleepStack
PriceFreeFree
Rating4.2 (27 ratings) — better4.0 (4 ratings)
Positive reviews85.2% of reviews—
Number of ratings27 — better4
Update frequencyEvery 3 days — betterEvery 10 days
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPod — betteriPhone
Requires iOS15.0 — better18.0
Further details — not scored
Size66 MB49 MB
Age rating4+4+
DeveloperImperfect Wellness, IncNUNE LLC

Customer experience

Imperfect

All ratings27 ratings
Positive81.5%
Neutral0.0%
Negative18.5%
Written reviews27 reviews
Positive85.2%
Neutral0.0%
Negative14.8%

SleepStack

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%

In-app purchases

None

Imperfect

No in-app purchases

3 purchases

SleepStack

Subscriptions3
  • SleepStack Pro weekly$4.997 Days
  • SleepStack Pro Yearly$29.991 Year
  • SleepStack Yearly1 Year trial$59.991 Year

Questions

Is Imperfect free?
Imperfect is free to download, with no in-app purchases.
Is SleepStack free?
SleepStack is free to download, with in-app purchases available.
Which has better reviews, Imperfect or SleepStack?
Imperfect is rated higher. Imperfect averages 4.2 out of 5 from 27 ratings, while SleepStack averages 4.0 from 4 ratings.
Do Imperfect or SleepStack have ads?
Neither Imperfect nor SleepStack shows ads.
Which is updated more often, Imperfect or SleepStack?
Imperfect ships an update every 3 days, and SleepStack every 10 days. Most recently, Imperfect was updated on October 12, 2026 and SleepStack on October 3, 2026.

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