Comparison

Tempdrop vs ThermoRegisterPlus

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

Head to head
About

Tempdrop

This app works with a specialized thermometer to track subtle overnight temperature changes. It helps identify hormonal fluctuations throughout the menstrual cycle, pinpoint ovulation, and predict cycle phases. The data supports fertility awareness and cycle tracking.

Highlights
  • Basal body temperature tracking
  • Ovulation pinpointing
  • Menstrual cycle prediction
  • Hormonal fluctuation correlation
  • Fertility awareness support
Features
Read full description

The Tempdrop app is designed to complement the Tempdrop device - a personalized user-specific thermometer that captures minute temperature variations throughout the night to pinpoint the basal body temperature. Detected variations in temperature correlate with hormonal fluctuations throughout the menstrual cycle. When used with the Tempdrop device, this app can help users to pinpoint ovulation and effectively track and predict the varying phases of the cycle. Disclaimer: The Tempdrop sensor and app are intended as complementary instruments to enhance your ability to monitor your fertility and share health details. The app and its wearable sensor, in themselves, are not, nor are they intended to be, a fertility monitor, a substitute for contraception, or a birth control method. We recognize the need of some to use the data and information provided to support ongoing health and menstrual cycle tracking, however, it is important to note that this should NOT be used as a substitute for an in-presence qualified professional, medical analysis, advice, guidance, or treatment. We strongly advise seeking a qualified Fertility Awareness instructor or other self-teaching resources to learn a symptothermal method and support your fertility journey. The provided interpretations and prediction guidelines are not suitable for use with irregular cycles. Optimal performance is dependent on correct and consistent use. Individual usage, wearing, input, and circumstances can affect the data. The user is fully responsible for the individual data inputs. The Tempdrop Sensor is approved for use in the USA, and is registered in the FDA database under registration number 3016099071. The device is classified as "Device, Fertility Diagnostic, Proceptive”. A link to the terms of use - https://www.tempdrop.com/pages/tos A link to the privacy policy - https://www.tempdrop.com/pages/privacy-policy

About

ThermoRegisterPlus

Record your body temperature and basal body temperature data directly to Apple Health. This application allows manual entry of temperature readings from your phone, helping you track your health metrics.

Highlights
  • Register body temperature data
  • Register basal body temperature data
  • Data syncs to Health app
  • Manual data entry via phone
Read full description

ThermoRegisterPlus can be register Body Temperature(&Basal Body Temperature) data Point to Health app for iOS. Features - Add Body Temperature Data by using your Phone - Add Basal Body Temperature Data by using your Phone(optional) ※iPhone do not have a mechanism for measuring body temperature. ThermoRegisterPlus is an app to register the measured value.

Screenshots

Tempdrop4 screens
ThermoRegisterPlus3 screens

Verdict

The call

The clearest difference is review sentiment: ThermoRegisterPlus at 100% against Tempdrop's 38%. ThermoRegisterPlus also leads on rating (5.0 vs 4.2) and iOS requirement (8.0 vs 15.0). Tempdrop's advantage is ads (none vs shown) and ratings volume (711 vs 1). On price, in-app purchases, monetization model 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. Tempdrop sells 6 in-app purchases, starting at $2.99 per month and ThermoRegisterPlus sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

ThermoRegisterPlus holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Tempdrop has 711 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 38% of Tempdrop's written reviews are positive against 100% of ThermoRegisterPlus's.

UpkeepUpdate frequency

Tempdrop ships an update every 2 months, ThermoRegisterPlus every 14 months. The most recent releases landed on October 15, 2026 and October 4, 2026 respectively.

Scorecard6 real differences · 4 level
Tempdrop versus ThermoRegisterPlus: the parameters behind the verdict, then further details
ParameterTempdropThermoRegisterPlus
PriceFreeFree
Rating4.2 (711 ratings)5.0 (1 ratings) — better
Positive reviews38.3% of reviews100.0% of reviews — better
Number of ratings711 — better1
Update frequencyEvery 2 months — betterEvery 14 months
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.08.0 — better
Further details — not scored
Size103 MB9 MB
Age rating17+4+
DeveloperTempdrop IncAirwire products.

Customer experience

Tempdrop

All ratings711 ratings
Positive80.3%
Neutral6.2%
Negative13.5%
Written reviews167 reviews
Positive38.3%
Neutral18.6%
Negative43.1%

ThermoRegisterPlus

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Tempdrop

Reported bugs

4 issues
  • App crashes and freezes
  • Issues with syncing device data
  • Inaccurate cycle predictions and phase tracking
  • Temperature data changes over time

Requested features

5 requests
  • Improved sleep tracking capabilities
  • More customizable symptom and data tracking
  • Ability to manually confirm ovulation
  • Integration with other fertility/health apps
  • Support for irregular cycles and postpartum/breastfeeding phases

ThermoRegisterPlus

Not enough reviews yet to summarise bugs or requests.

In-app purchases

6 purchases

Tempdrop

Subscriptions6
  • Tempdrop Promo Premium monthly2 Months trial$2.991 Month
  • Tempdrop Premium monthly2 Months trial$6.001 Month
  • Tempdrop Promo Premium quarterly2 Months trial$7.993 Months
Show 3 more
  • Tempdrop Premium quarterly2 Months trial$15.003 Months
  • Tempdrop Promo Premium yearly2 Months trial$24.991 Year
  • Tempdrop Premium yearly*2 Months trial$48.001 Year
1 purchases

ThermoRegisterPlus

One-time1
  • ThermoRegister Pro ver.$0.99

Questions

Is Tempdrop free?
Tempdrop is free to download, with in-app purchases available.
Is ThermoRegisterPlus free?
ThermoRegisterPlus is free to download, with in-app purchases available.
Which has better reviews, Tempdrop or ThermoRegisterPlus?
ThermoRegisterPlus is rated higher. Tempdrop averages 4.2 out of 5 from 711 ratings, while ThermoRegisterPlus averages 5.0 from 1 ratings.
Do Tempdrop or ThermoRegisterPlus have ads?
ThermoRegisterPlus shows ads; Tempdrop does not.
Which is updated more often, Tempdrop or ThermoRegisterPlus?
Tempdrop ships an update every 2 months, and ThermoRegisterPlus every 14 months. Most recently, Tempdrop was updated on October 15, 2026 and ThermoRegisterPlus on October 4, 2026.

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