Comparison

Basal body temperature 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

Basal body temperature

Track your basal body temperature daily to understand your fertility window and predict future cycles. The app offers easy daily recording, visual graphs, and calendar views to help you monitor your health and potential for pregnancy.

Highlights
  • Basal body temperature charting
  • Pregnancy chance prediction
  • Calendar view with future dates
  • Daily record input with morning alarm
  • Passcode protection for privacy
  • Data backup functionality
  • Ad removal option
Features
Read full description

The app informs you of your chances of becoming pregnant by taking your basal body temperature both on a chart and calendar. Its simple controls encourage you to keep recording every day when you are still groggy in the morning. [Basal body temperature graph] Easy to view your basal body temperature. - Pinch in and out to zoom - Horizontal view (Full screen graph) [Calendar] Track your daily records and check your future schedule on the calendar. - Best chance of getting pregnant - Future period dates [Output of the basal body temperature graph] This feature is useful for when you show someone your graph or display on an iPad. - Support photo, email, AirPrint, and so on [Simple to record your basal body temperature] "Morning alarm" function allows you to jump to the input screen from the iPhone's lock screen in order to make it easier to record even when you are still sleepy in the morning. [Passcode protection] Set a password for maximum security. Password requirement can be removed when you are home. [Data backup] [Remove ads] Remove the ads from the settings menu. Keywords basal body temperature, graph, pregnancy, pregnant, calendar, free, ovulation, period, record, woman, condition, baby, conceive

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

Basal body temperature4 screens
Thermometer Log4 screens

Verdict

The call

The clearest difference is review sentiment: Thermometer Log at 50% against Basal body temperature's 0%. Thermometer Log also leads on rating (4.8 vs 1.8) and update cadence (every 2 months vs every 26 months). Basal body temperature's advantage is in-app purchases (none vs 1) and iOS requirement (11.0 vs 15.6). On price, ratings volume, 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. Thermometer Log sells 1 one-off in-app purchase. Basal body temperature asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Thermometer Log holds the better App Store score, 4.8 against 1.8. Both are backed by a comparable volume of ratings — 4 and 6 respectively. Written reviews point the same way: 0% of Basal body temperature's written reviews are positive against 50% of Thermometer Log's.

UpkeepUpdate frequency

Basal body temperature ships an update every 26 months, Thermometer Log every 2 months. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

Scorecard6 real differences · 4 level
Basal body temperature versus Thermometer Log: the parameters behind the verdict, then further details
ParameterBasal body temperatureThermometer Log
PriceFreeFree
Rating1.8 (4 ratings)4.8 (6 ratings) — better
Positive reviews0.0% of reviews50.0% of reviews — better
Number of ratings46 — better
Update frequencyEvery 26 monthsEvery 2 months — better
AdsYesYes
In-app purchasesNo — betterYes
MonetizationAd-supported — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better15.6
Further details — not scored
Size102 MB6 MB
Age rating12+4+
Developerfamiliar IncorporatedKei Suefuji

Customer experience

Basal body temperature

All ratings4 ratings
Positive0.0%
Neutral25.0%
Negative75.0%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Thermometer Log

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

In-app purchases

None

Basal body temperature

No in-app purchases

1 purchases

Thermometer Log

One-time1
  • PREMIUM$4.99

Questions

Is Basal body temperature free?
Basal body temperature is free to download, with no in-app purchases.
Is Thermometer Log free?
Thermometer Log is free to download, with in-app purchases available.
Which has better reviews, Basal body temperature or Thermometer Log?
Thermometer Log is rated higher. Basal body temperature averages 1.8 out of 5 from 4 ratings, while Thermometer Log averages 4.8 from 6 ratings.
Do Basal body temperature or Thermometer Log have ads?
Both Basal body temperature and Thermometer Log show ads.
Which is updated more often, Basal body temperature or Thermometer Log?
Basal body temperature ships an update every 26 months, and Thermometer Log every 2 months. Most recently, Basal body temperature was updated on October 25, 2026 and Thermometer Log on October 24, 2026.

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