Comparison

Time Timer vs Chromatic Vision Simulator

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

Chromatic Vision Simulator

Simulate various types of color vision deficiencies in real-time using your device's camera or photos. Understand how individuals with protanopia, deuteranopia, or tritanopia perceive the world by visualizing color differences.

Highlights
  • Simulates color vision deficiencies
  • Real-time camera simulation
  • Photo simulation
  • Supports protanope/protanomal
  • Supports deuteranope/deuteranomal
  • Supports tritanope/tritanomal
Features
Read full description

“Chromatic Vision Simulator” is a color vision simulation tool which simulates the color vision of color vision deficiencies. This software is developed by Kazunori Asada (Ph.D. medical science and Ph.D. media design), based on the research in color science. About 5% of men have difficulty distinguishing red and green, or recognizing dark red. Such color deficiency can be classified into three major categories: protanope / Protanomal, Deuteranope / Deuteranomal and Tritanope / Tritanomal. Color deficiencies are the inability to tell differences between some colors other people can easily distinguish. People with different types of color vision deficiency perceive colors differently. For example, individuals diagnosed as Protan or Deutan cannot perceive differences between red and green, and pink and cyan. These color visions are predictable by calculating working of the cone cells that perceives the color to some degree. "Chromatic Vision Simulator" makes simulated images of each color vision type from built-in Camera or Photos and shows you how people with specific types of color vision sees the world in real-time.

Screenshots

Time Timer4 screens
Chromatic Vision Simulator4 screens

Verdict

The call

The clearest difference is in-app purchases: Chromatic Vision Simulator at none against Time Timer's 1. Chromatic Vision Simulator also leads on review sentiment (85% vs 63%) and iOS requirement (14.0 vs 16.0). Time Timer's advantage is update cadence (every 2 weeks vs every 11 months) and ratings volume (15K vs 58). On price, 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

Both are free to download. Time Timer sells 1 in-app purchase, starting at $9.95 per year. Chromatic Vision Simulator asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Time Timer holds the better App Store score, 4.6 against 4.4. That said, the two scores are not equally well evidenced: Time Timer has 15K ratings behind it against 58, so its average is the more settled of the two. Written reviews complicate that: 63% of Time Timer's written reviews are positive against 85% of Chromatic Vision Simulator's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Time Timer ships an update every 2 weeks, Chromatic Vision Simulator every 11 months. The most recent releases landed on October 12, 2026 and October 13, 2026 respectively.

Scorecard6 real differences · 4 level
Time Timer versus Chromatic Vision Simulator: the parameters behind the verdict, then further details
ParameterTime TimerChromatic Vision Simulator
PriceFreeFree
Rating4.6 (15K ratings) — better4.4 (58 ratings)
Positive reviews62.9% of reviews84.9% of reviews — better
Number of ratings15K — better58
Update frequencyEvery 2 weeks — betterEvery 11 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
DevicesiPhone, iPad, Mac, Apple Watch — betteriPhone, iPad, iPod
Requires iOS16.014.0 — better
Further details — not scored
Size174 MB6 MB
Age rating4+4+
DeveloperTime Timer LLCKazunori Asada

Customer experience

Time Timer

All ratings14,552 ratings
Positive90.3%
Neutral3.2%
Negative6.5%
Written reviews334 reviews
Positive62.9%
Neutral14.1%
Negative23.1%

Chromatic Vision Simulator

All ratings58 ratings
Positive84.5%
Neutral5.2%
Negative10.3%
Written reviews93 reviews
Positive84.9%
Neutral5.4%
Negative9.7%

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

Chromatic Vision Simulator

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

Chromatic Vision Simulator

No in-app purchases

Questions

Is Time Timer free?
Time Timer is free to download, with in-app purchases available.
Is Chromatic Vision Simulator free?
Chromatic Vision Simulator is free to download, with no in-app purchases.
Which has better reviews, Time Timer or Chromatic Vision Simulator?
Time Timer is rated higher. Time Timer averages 4.6 out of 5 from 15K ratings, while Chromatic Vision Simulator averages 4.4 from 58 ratings.
Do Time Timer or Chromatic Vision Simulator have ads?
Neither Time Timer nor Chromatic Vision Simulator shows ads.
Which is updated more often, Time Timer or Chromatic Vision Simulator?
Time Timer ships an update every 2 weeks, and Chromatic Vision Simulator every 11 months. Most recently, Time Timer was updated on October 12, 2026 and Chromatic Vision Simulator on October 13, 2026.

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