Comparison

Time Timer vs Sun to Moon Sleep Clock

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

Head to head
About

Time Timer

This app provides a visual representation of time passing, making it easier to manage tasks and routines. It's designed to be inclusive and flexible for various needs, from educational settings to personal productivity.

Highlights
  • Iconic visual timer with disappearing disk
  • Inclusive design for various needs
  • Flexible routine creation and sequencing
  • Multiple timers and preset options
  • Customizable sound, vibration, and color
Features
Read full description

Feel time move. Stay on track. Stress less. From the makers of the original red disk timer, the Time Timer® App transforms the powerful visual tool trusted by families, teachers, therapists, and productivity pros for over 30 years into a fully customizable experience on your device. Whether you’re helping students build focus, supporting kids through daily routines, or simply managing your own tasks without overwhelm—Time Timer makes time feel more tangible and manageable. What Makes Time Timer Different? Iconic Visual Timer Watch time disappear as the disk gets smaller—a simple, intuitive way to feel time passing, not just track it. Inclusive by Design Trusted by people with ADHD, Autism, executive function challenges, or just a busy brain. Invented by a mom for her child, Time Timer has supported users of all abilities for decades. Flexible for Every Routine Use it once or build structured sequences. Create presets for daily habits. Run multiple timers at once. Make routines visual and calm transitions. Trusted in Schools, Homes & Workplaces From kindergarten classrooms to therapy sessions to boardrooms, Time Timer helps reduce resistance, improve focus, and make time awareness easier for everyone. Free Features Include: Create up to 3 timers Run multiple timers at once Use the original 60-minute red disk — or choose any duration Adjust sound, vibration, and color with limited options Premium Features Unlock Even More: Unlimited customization Build routines with timer sequencing (morning checklists, therapy steps, work sprints) Organize timers with Groups Sync across mobile and desktop devices Quick Set +/- buttons for fast adjustments Customize disk size and detail level Use Time Timer For: Morning and bedtime routines Homework and study blocks Transitions between tasks Work sprints and focus sessions Therapy, coaching, or classroom support Daily life skills for kids, teens, and adults Why It Works Time Timer® transforms time from something abstract and invisible into something your eyes can track and your brain can trust. That’s why it’s backed by research, loved by educators, and recommended by occupational therapists worldwide. Created for real life. Trusted for decades. Download Time Timer today and feel the difference.

About

Sun to Moon Sleep Clock

This app acts as a gentle sleep trainer for young children, visually indicating when it's time to stay in bed and when it's okay to wake up. It offers customizable features like sleep sounds, nap timers, and a reward system to encourage good sleep habits.

Highlights
  • Visual star countdown for bedtime
  • Customizable sleep and wake sounds
  • Nap timers and bedtime routine tools
  • Personalizable characters with outfits
  • Optional Snooze Rewards system
  • Visual shooting-star progress bar
  • PIN-protected settings
Features
Read full description

Sun to Moon Sleep Clock is a gentle sleep trainer that helps toddlers and young children learn when to stay in bed and when it’s okay to get up. Throughout the night, 26 stars disappear one by one, giving kids an easy visual countdown until morning. The app is quick to set up, fully customizable, and packed with optional sleep sounds, wake sounds, nap timers, and bedtime-routine tools. Kids can personalize the friendly Sun and Moon characters with outfits and accessories from their shops. Everything is unlocked from the start, but you can enable the optional Snooze Rewards system to encourage healthy sleep habits. The longer your child stays in bed, the more Snooze Coins they earn — and they can trade them for fun gifts for Sun and Moon. Wake-up times can be set from the settings screen or by tapping the orange time buttons on the main daytime screen. Tapping Goodnight triggers an instant sunset at bedtime. Need an early wake-up for a nap or a schedule change? Tap Moon’s nose three times for an out-of-schedule sunrise — and three more times for an immediate sunrise. Full instructions: https://www.msibley.com/sleep-clock Updates & tips: https://www.facebook.com/suntomoonsleepclock –––––––––––––––––––––––––––– Key Features • Gentle sleep training with a visual star countdown • Soothing sleep sounds: Fan, white noise (hair dryer), waves, heartbeat, whale song, rain and more — or silence • Fun wake-up sounds: Birds, digital alarm, drums, rooster, Happy Birthday, Santa/Jingle Bells and more — or silence • Custom schedules: Optional 7-day routine planner • Digital or analog clock styles, including a large-digit mode • Speaking Clock: Tap Sun or Moon’s mouth to hear the time (optional) • Customizable outfits and accessories for Sun and Moon • Themes: Birthday, Christmas, Easter, Halloween, St Patrick’s Day, Pirates, Sports, Space • Snooze Rewards system using collectible Snooze Coins (optional) • Shooting-star progress bar for nighttime visualization • Final Countdown Mode: Faster 12-star countdown before wake-up (optional) • Reading Time: Moon reads for up to an hour at sunrise or sunset • Nose Tap Naps: Set a nap duration and activate with 3 taps • Immediate Sunrise: Trigger instantly with 3 extra taps • Morning Memo: Write a message for your child — Sun can read it aloud (optional) • Dim & Auto-Dim controls to reduce brightness • Dark Mode for softer nighttime colors • Built-in help screens throughout the app • Multilingual support: English, German, Spanish, French, Italian, Dutch, Portuguese, Simplified Chinese, Japanese and Korean • PIN-protected settings with Face ID / Touch ID support (master code: 8529) • Dreamy illustrations by artist Michael Sibley –––––––––––––––––––––––––––– Helpful Notes • For uninterrupted use, enable Guided Access to disable device buttons • Keep your device plugged in while the app is running overnight • Reduce screen brightness or enable Auto-Dim for extended nighttime use • If you forget your settings PIN, the master code is 8529 –––––––––––––––––––––––––––– If You Find the App Helpful… A rating or review on the App Store really helps us improve Sun to Moon. Thank you for your support — and sweet dreams!

Screenshots

Time Timer4 screens
Sun to Moon Sleep Clock4 screens

Verdict

The call

The clearest difference is price: Time Timer at Free against Sun to Moon Sleep Clock's $2.99. Time Timer also leads on update cadence (every 2 weeks vs every 2 months) and ratings volume (15K vs 107). Sun to Moon Sleep Clock's advantage is in-app purchases (none vs 1) and review sentiment (94% vs 63%). On rating, 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

Time Timer is free to download; Sun to Moon Sleep Clock costs $2.99 up front. Time Timer sells 1 in-app purchase, starting at $9.95 per year. Sun to Moon Sleep Clock asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.6 for Time Timer against 4.5 for Sun to Moon Sleep Clock. That said, the two scores are not equally well evidenced: Time Timer has 15K ratings behind it against 107, so its average is the more settled of the two. Written reviews are what separate them: 63% of Time Timer's written reviews are positive against 94% of Sun to Moon Sleep Clock's.

UpkeepUpdate frequency

Time Timer ships an update every 2 weeks, Sun to Moon Sleep Clock every 2 months. The most recent releases landed on October 17, 2026 and October 14, 2026 respectively.

Scorecard7 real differences · 3 level
Time Timer versus Sun to Moon Sleep Clock: the parameters behind the verdict, then further details
ParameterTime TimerSun to Moon Sleep Clock
PriceFree — better$2.99
Rating4.6 (15K ratings) — better4.5 (107 ratings)
Positive reviews62.7% of reviews94.1% of reviews — better
Number of ratings15K — better107
Update frequencyEvery 2 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
DevicesiPhone, iPad, Mac, Apple Watch — betteriPhone, iPad, iPod
Requires iOS16.013.0 — better
Further details — not scored
Size174 MB52 MB
Age rating4+4+
DeveloperTime Timer LLCMichael Sibley

Customer experience

Time Timer

All ratings14,552 ratings
Positive90.3%
Neutral3.2%
Negative6.5%
Written reviews335 reviews
Positive62.7%
Neutral14.0%
Negative23.3%

Sun to Moon Sleep Clock

All ratings107 ratings
Positive86.9%
Neutral4.7%
Negative8.4%
Written reviews17 reviews
Positive94.1%
Neutral5.9%
Negative0.0%

Bugs and requests

Time Timer

Reported bugs

4 issues
  • No timers show up in app
  • Timer stops working when phone is locked
  • Inconsistent dark mode implementation
  • Vibration doesn't work as expected

Requested features

7 requests
  • Add Apple Watch complication
  • Allow rearranging of timers
  • Ability to continue timer after time is up
  • Option to change timer color and background
  • Lock timer settings on Apple Watch
Show 2 more
  • Add percentage countdown option
  • Integrate current time into app

Sun to Moon Sleep Clock

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Time Timer

Subscriptions1
  • Unlock all Time Timer features$9.951 Year
None

Sun to Moon Sleep Clock

No in-app purchases

Questions

Is Time Timer free?
Time Timer is free to download, with in-app purchases available.
Is Sun to Moon Sleep Clock free?
Sun to Moon Sleep Clock costs $2.99, with no in-app purchases.
Which has better reviews, Time Timer or Sun to Moon Sleep Clock?
Time Timer is rated higher. Time Timer averages 4.6 out of 5 from 15K ratings, while Sun to Moon Sleep Clock averages 4.5 from 107 ratings.
Do Time Timer or Sun to Moon Sleep Clock have ads?
Neither Time Timer nor Sun to Moon Sleep Clock shows ads.
Which is updated more often, Time Timer or Sun to Moon Sleep Clock?
Time Timer ships an update every 2 weeks, and Sun to Moon Sleep Clock every 2 months. Most recently, Time Timer was updated on October 17, 2026 and Sun to Moon Sleep Clock on October 14, 2026.

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