Comparison

Time Timer vs IndoorCO2Map Data Collector

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

IndoorCO2Map Data Collector

Contribute to a citizen science project by collecting indoor CO2 concentration data in public buildings. Use a supported CO2 sensor and this application to build a comprehensive dataset for analysis.

Highlights
  • Collect indoor CO2 concentration data
  • Supports Aranet, Airvalent, AirSpot, Inkbird-IAMT1 sensors
  • Contribute to citizen science project
  • Builds comprehensive indoor CO2 dataset
  • Data collection for non-residential buildings
Features
Read full description

This App is part of the IndoorCO2map.com project , a citizen data collection initiative to collect data about the CO2 concentration in non-residential Buildings (shops, restaurants, hospital etc.). Using this app and a supported CO2 Sensor, you can help creating a large and comprehensive dataset about Indoor CO2-Levels. Currently Aranet , Airvalent, AirSpot and the Inkbird-IAMT1 Sensors are supported.

Screenshots

Time Timer4 screens
IndoorCO2Map Data Collector2 screens

Verdict

The call

The clearest difference is review sentiment: IndoorCO2Map Data Collector at 100% against Time Timer's 63%. IndoorCO2Map Data Collector also leads on in-app purchases (none vs 1) and rating (5.0 vs 4.6). Time Timer's advantage is update cadence (every 2 weeks vs every 3 months) and ratings volume (15K vs 2). On price, ads and iOS requirement 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. IndoorCO2Map Data Collector asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

IndoorCO2Map Data Collector holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Time Timer has 15K ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 63% of Time Timer's written reviews are positive against 100% of IndoorCO2Map Data Collector's.

UpkeepUpdate frequency

Time Timer ships an update every 2 weeks, IndoorCO2Map Data Collector every 3 months. The most recent releases landed on October 23, 2026 and October 19, 2026 respectively.

Scorecard7 real differences · 3 level
Time Timer versus IndoorCO2Map Data Collector: the parameters behind the verdict, then further details
ParameterTime TimerIndoorCO2Map Data Collector
PriceFreeFree
Rating4.6 (15K ratings)5.0 (2 ratings) — better
Positive reviews62.7% of reviews100.0% of reviews — better
Number of ratings15K — better2
Update frequencyEvery 2 weeks — betterEvery 3 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
DevicesiPhone, iPad, Mac, Apple Watch — betteriPhone, iPod
Requires iOS16.015.0 — better
Further details — not scored
Size174 MB101 MB
Age rating4+4+
DeveloperTime Timer LLCAurel Wuensch

Customer experience

Time Timer

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

IndoorCO2Map Data Collector

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
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

IndoorCO2Map Data Collector

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

IndoorCO2Map Data Collector

No in-app purchases

Questions

Is Time Timer free?
Time Timer is free to download, with in-app purchases available.
Is IndoorCO2Map Data Collector free?
IndoorCO2Map Data Collector is free to download, with no in-app purchases.
Which has better reviews, Time Timer or IndoorCO2Map Data Collector?
IndoorCO2Map Data Collector is rated higher. Time Timer averages 4.6 out of 5 from 15K ratings, while IndoorCO2Map Data Collector averages 5.0 from 2 ratings.
Do Time Timer or IndoorCO2Map Data Collector have ads?
Neither Time Timer nor IndoorCO2Map Data Collector shows ads.
Which is updated more often, Time Timer or IndoorCO2Map Data Collector?
Time Timer ships an update every 2 weeks, and IndoorCO2Map Data Collector every 3 months. Most recently, Time Timer was updated on October 23, 2026 and IndoorCO2Map Data Collector on October 19, 2026.

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