Comparison

THIM vs HIIT Timer

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

Head to head
About

THIM

This app helps you improve sleep quality through a unique conditioning program developed by a sleep scientist. It tracks sleep stages, offers power naps, and features a smart alarm to wake you from light sleep. Monitor your sleep efficiency with a score used in sleep clinics.

Highlights
  • Sleep conditioning program
  • Track sleep quality and stages
  • Accurate 10-minute power naps
  • Smart alarm for light sleep wake-ups
  • Sleep efficiency scoring
  • Community for sleep optimization
Features
Read full description

THIM is the ring that conditions you for better sleep. Sleep well tonight and get the most from tomorrow. Developed by sleep scientist Professor Leon Lack, use one of THIM’s many novel features: • IMPROVE SLEEP – THIM offers a unique sleep-conditioning program designed to help you fall asleep sooner and reduce wakefulness across the night. • TRACK SLEEP QUALITY - Use your phone to track your sleep quality throughout the night including stages of sleep and periods of wakefulness. • POWER NAP – THIM determines when you fall asleep to the nearest minute. No other device can deliver this accuracy. This ensures exactly 10-mins of sleep during your nap – the time needed to avoid sleep inertia upon waking. • SMART ALARM – Waking from deep sleep is not pleasant. In contrast, waking from light sleep feels great. Use this feature to ensure you wake from a light stage of sleep so you bounce out of bed in the morning and enjoy a great start to the day. • MONITOR SLEEP EFFICIENCY – THIM provides a unique sleep efficiency score for each night of sleep. This algorithm is used by sleep clinics to score sleep studies. • JOIN OUR COMMUNITY – Join thousands of people whom have traded in their non-assistive sleep tracker for a product, which contains novel, evidenced-based programs to improve and optimize your sleep. Other device's can only track sleep. THIM improves sleep. Welcome.

About

HIIT Timer

This app provides a simple interval timer for various high-intensity training styles like HIIT, Tabata, EMOM, and AMRAP. Track your workouts, maintain streaks, and save custom timer presets for easy access. It's designed for home or gym training and requires no account or subscription.

Highlights
  • HIIT & Tabata timer
  • EMOM interval training
  • AMRAP workout mode
  • Workout calendar tracking
  • Streak and stats tracking
  • Customizable presets
  • Smart workout reminders
Features
Read full description

A simple interval timer for HIIT, Tabata, EMOM, and AMRAP workouts. All features are free with ad support. No account. No subscription. No usage limits. ◆ Four workout modes 【HIIT】 Set your own work time, rest time, and rounds. Built for classic high-intensity interval training your way. 【Tabata】 The 20s-on / 10s-off × 8 protocol. One tap to start the original. 【EMOM (Every Minute On the Minute)】 Repeating one-minute intervals. Built for CrossFit, strength training, and conditioning sessions. 【AMRAP (As Many Rounds As Possible)】 Set a time cap and count your rounds. Push the limit. ◆ Keep your streak alive ・Calendar view of every workout day ・Daily streak counter to keep the momentum ・Monthly workout totals at a glance ◆ Save your favorites Save your most-used presets. One tap to start next time. ◆ Smart reminders Weekly reminders that gently push you back on track when you miss a session. ◆ Built to stay out of your way ・No account required. Open the app, set the timer, train ・No bloated features, no upsells, no data harvesting ◆ Made for ・Home HIIT and bodyweight workouts ・Tabata protocols, including custom variations ・Strength training intervals ・Running and cardio circuits ・Yoga and stretching session timing ・CrossFit-style EMOM and AMRAP WODs ・Functional fitness and conditioning No account. No subscription. Just set the timer and go.

Screenshots

THIM4 screens
HIIT Timer4 screens

Verdict

The call

The clearest difference is review sentiment: HIIT Timer at 100% against THIM's 0%. HIIT Timer also leads on update cadence (every 3 weeks vs every 2 months). THIM's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

THIM ships an update every 2 months, HIIT Timer every 3 weeks. The most recent releases landed on September 22, 2026 and September 20, 2026 respectively.

Scorecard5 real differences · 3 level
THIM versus HIIT Timer: the parameters behind the verdict, then further details
ParameterTHIMHIIT Timer
PriceFreeFree
Positive reviews0.0% of reviews100.0% of reviews — better
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree — betterAd-supported
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS12.0 — better15.0
Further details — not scored
Size96 MB89 MB
Age rating12+4+
DeveloperRe-Time Pty Ltdtsyk-app

Customer experience

THIM

Written reviews5 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

HIIT Timer

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

THIM

No in-app purchases

None

HIIT Timer

No in-app purchases

Questions

Is THIM free?
THIM is free to download, with no in-app purchases.
Is HIIT Timer free?
HIIT Timer is free to download, with no in-app purchases.
Do THIM or HIIT Timer have ads?
HIIT Timer shows ads; THIM does not.
Which is updated more often, THIM or HIIT Timer?
THIM ships an update every 2 months, and HIIT Timer every 3 weeks. Most recently, THIM was updated on September 22, 2026 and HIIT Timer on September 20, 2026.

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