Comparison

TempGrapher vs Thermometer Log

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

Head to head
About

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.

Highlights
  • Simple slider input for temperature
  • Celsius/Fahrenheit conversion
  • Line graph visualization
  • HealthKit integration
  • Calendar app data saving
  • CSV data export
  • Dark mode support
Features
Read full description

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.

About

Thermometer Log

Easily record and track your body temperature with this intuitive app. View historical data, analyze trends with graphs, and export your records. Supports both Celsius and Fahrenheit units.

Highlights
  • Easy temperature recording
  • Celsius and Fahrenheit support
  • Weekly, monthly, and 3-month graphs
  • Average temperature display
  • Data correction and addition
  • CSV export
Features
Read full description

This app is an app that allows you to easily record your body temperature. You can record many times a day! In addition, two units of body temperature can be used: Celsius (℃) and Fahrenheit (℉). Just move the scale on the home screen left and right to set the body temperature, and tap the save button to easily record the body temperature and save time! Since it can be recorded many times a day, it is ideal for recording body temperature in the morning and at night. On the "Analysis" screen, a graph of weekly, monthly, and 3-month body temperature is displayed. In addition, the average body temperature for that period is displayed. You can check the data by tapping the graph. On the "History" screen, the record of the body temperature of the year and month selected in the upper right of the screen is displayed. You can correct the body temperature data by double tapping the data. If you forget to record the body temperature data, you can add it by tapping the "Add" button on the upper left of the screen. When you tap the "Add" button, the input screen will be displayed. Select and add the date, time, and body temperature. By tapping the "Export CSV file" button, you can convert the history data to a CSV file and attach it to an email for export. On the "Settings" screen, you can set the unit of body temperature. You can also set the day of the week at the beginning of the week in the weekly graph. You can choose to start on Monday or Sunday. In the free version, you can check the body temperature record for up to one week. If you have an unlimited recording period and want to check monthly or 3 month data, please consider purchasing the premium version in the app. ---------------------- Terms of Service and Privacy Policy: https://akikibai-labolatory.jimdofree.com/privacy-policy-log-apps/

Screenshots

TempGrapher4 screens
Thermometer Log4 screens

Verdict

The call

The clearest difference is price: Thermometer Log at Free against TempGrapher's $0.99. Thermometer Log also leads on rating (4.8 vs 1.0) and review sentiment (50% vs 27%). TempGrapher's advantage is in-app purchases (none vs 1) and ads (none vs shown). On update cadence, device support 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

Thermometer Log is free to download; TempGrapher costs $0.99 up front. Thermometer Log sells 1 one-off in-app purchase. TempGrapher asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Thermometer Log holds the better App Store score, 4.8 against 1.0. That said, the two scores are not equally well evidenced: Thermometer Log has 6 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 27% of TempGrapher's written reviews are positive against 50% of Thermometer Log's.

UpkeepUpdate frequency

TempGrapher ships an update every 3 months, Thermometer Log every 2 months. The most recent releases landed on October 2, 2026 and October 10, 2026 respectively.

Scorecard7 real differences · 3 level
TempGrapher versus Thermometer Log: the parameters behind the verdict, then further details
ParameterTempGrapherThermometer Log
Price$0.99Free — better
Rating1.0 (1 ratings)4.8 (6 ratings) — better
Positive reviews26.7% of reviews50.0% of reviews — better
Number of ratings16 — better
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS14.0 — better15.6
Further details — not scored
Size6 MB6 MB
Age rating4+4+
Developerkazuhiko kurodaKei Suefuji

Customer experience

TempGrapher

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews15 reviews
Positive26.7%
Neutral33.3%
Negative40.0%

Thermometer Log

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews10 reviews
Positive50.0%
Neutral10.0%
Negative40.0%

In-app purchases

None

TempGrapher

No in-app purchases

1 purchases

Thermometer Log

One-time1
  • PREMIUM$4.99

Questions

Is TempGrapher free?
TempGrapher costs $0.99, with no in-app purchases.
Is Thermometer Log free?
Thermometer Log is free to download, with in-app purchases available.
Which has better reviews, TempGrapher or Thermometer Log?
Thermometer Log is rated higher. TempGrapher averages 1.0 out of 5 from 1 ratings, while Thermometer Log averages 4.8 from 6 ratings.
Do TempGrapher or Thermometer Log have ads?
Thermometer Log shows ads; TempGrapher does not.
Which is updated more often, TempGrapher or Thermometer Log?
TempGrapher ships an update every 3 months, and Thermometer Log every 2 months. Most recently, TempGrapher was updated on October 2, 2026 and Thermometer Log on October 10, 2026.

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