TempGrapher vs 20.20.20
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TempGrapher
Easily log your body temperature with a simple slider interface. View your temperature history as a line graph in both Celsius and Fahrenheit, with HealthKit support. Data is saved to your default calendar and can be shared via email or cloud services.
- Simple slider input for temperature
- Celsius/Fahrenheit conversion
- Line graph visualization
- HealthKit integration
- Calendar app data saving
- CSV data export
- Dark mode support
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TempGrapher is your body temperature tracking app. HealthKit support. This app has a very simple input method that just slide your finger on slider to choose your body temp.. No Keypad. And this app is converting between degrees Celsius to degrees Fahrenheit during input slider moving. And you can check your temperature record with line graph with the both of Celsius and Fahrenheit. Selection of the use of default Calendar App of iOS. Temperature data are saved at default Calendar App on iOS. You can check the date and data with default Calendar. and with using Cloud service, sharing of data will be available and you can referring the data from PC. Feature 1, There is a very simple user interface to input temperature data. 2, You can input notes. 3, The input range is between from 93.2 to 107.6 degrees Fahrenheit. (from34 to 42 degrees Celsius) with 0.1 degree interval. 4. Temperature data convert automatically between degrees Celsius to degrees Fahrenheit and record the both of data. 5, You can insert temp data. 6, There is a Reset menu to all data clear. 7, You can choose the font color for temperature display. There are White, Gray, Blue, Pink, Green and OFF. You can be hidden temp display by selecting OFF. 8, Dark mode support on iOS13. 9. Exporting stored data to mail in CSV format. 10, There is simple timer for five minute. A orange bar extend to the right. 11, HealthKit support.
20.20.20
This app helps you protect your vision from digital eye strain by reminding you to take breaks every 20 minutes. It features gamified wellness, progress tracking, and smart alerts to build healthy eye-care habits.
- 20.20.20 rule reminders
- Gamified wellness system
- Achievement system for motivation
- Progress tracking
- Smart haptic alerts
- Customizable daily schedules
- Dark Mode support
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Protect Your Vision with Purpose – The New 20.20.20 App Track Progress. Earn Achievements. Stay Focused. Screen time is unavoidable—but digital eye strain doesn't have to be. With a fully redesigned interface and a focus on gamified wellness, the all-new 20.20.20 app helps you build a healthy habit that protects your most valuable sense: your sight. What's New in This Major Update • A modern, intuitive interface with full Dark Mode support • Powerful achievement system to motivate consistency • Enhanced progress tracking for visualizing your improvement • Optimized experience across iPhone and Apple Watch • Polished UI with a clean, calming visual style The Science-Backed 20.20.20 Rule Every 20 minutes, look away from your screen for 20 seconds at something 20 feet away. It’s a proven method to reduce fatigue, dryness, and long-term strain. Built for Habits, Not Just Reminders • Smart haptic alerts gently cue your breaks without interrupting your workflow • Custom daily schedules let you decide when reminders are active • Visual progress insights help you build and maintain eye-care habits Motivate Yourself with Achievements Unlock meaningful milestones and stay consistent with goal-based rewards: • First Break – Complete your first eye exercise • Speed Demon – Do 5 exercises in a single day • Perfect Week – Meet your daily goals for 7 consecutive days • Week Warrior – Complete 50 sessions in a week • Time Master – Reach 10 hours of focused work • Consistency King – Maintain a 30-day streak Whether you're a student, remote worker, or power user, the 20.20.20 app makes it easy to care for your eyes—while keeping you motivated and engaged. Rebuild your habits. Redesign your focus. Reinforce your vision. Download the 20.20.20 app today and join thousands building healthier screen routines.
Screenshots
Verdict
The clearest difference is update cadence: 20.20.20 at weekly against TempGrapher's every 3 months. TempGrapher's advantage is review sentiment (27% vs 17%) and price ($0.99 vs $2.99). On rating, ratings volume, ads and in-app purchases 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
TempGrapher costs $0.99 and 20.20.20 $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 1.0 for TempGrapher against 1.0 for 20.20.20. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews are what separate them: 27% of TempGrapher's written reviews are positive against 17% of 20.20.20's.
TempGrapher ships an update every 3 months, 20.20.20 weekly. The most recent releases landed on November 1, 2026 and October 8, 2026 respectively.
| Parameter | TempGrapher | 20.20.20 |
|---|---|---|
| Price | $0.99 — better | $2.99 |
| Rating | 1.0 (1 ratings) | 1.0 (2 ratings) |
| Positive reviews | 26.7% of reviews — better | 16.7% of reviews |
| Number of ratings | 1 | 2 — better |
| Update frequency | Every 3 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPod | iPhone, iPod, Apple Watch — better |
| Requires iOS | 14.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 6 MB | 36 MB |
| Age rating | 4+ | 4+ |
| Developer | kazuhiko kuroda | AME Mobile Inc. |
Customer experience
TempGrapher
20.20.20
In-app purchases
TempGrapher
No in-app purchases
20.20.20
No in-app purchases









