Comparison

Tempdrop vs OTO Life

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

OTO Life

This app uses patented hardware and a proprietary wearable to measure ECG and EEG data. It analyzes this information to create adaptive activity plans, helping users manage stress and achieve health improvements by aligning their body to an optimal state.

Highlights
  • ECG and EEG measurement
  • Proprietary wearable integration
  • Cloud data analysis
  • Adaptive activity plans
  • Stress level reduction
  • Health goal management
Features
Read full description

OTO Life is a product designed to help you manage stress and hit multiple health related goals and improvements. The app combines patented hardware that measures ECG and EEG with a proprietary wearable. Using our patented cloud analysis of data and patented adaptive activity plans that customize daily activities for users based on their current physiological state, we help your body align to its optimal state to reduce your over all body's stress levels.

Screenshots

Tempdrop4 screens
OTO Life4 screens

Verdict

The call

The clearest difference is review sentiment: OTO Life at 100% against Tempdrop's 39%. OTO Life also leads on rating (5.0 vs 4.2) and in-app purchases (none vs 6). Tempdrop's advantage is ratings volume (711 vs 3) and device support (3 vs 1). 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. Tempdrop sells 6 in-app purchases, starting at $2.99 per month. OTO Life asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

OTO Life 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 3, so its average is the more settled of the two. Written reviews point the same way: 39% of Tempdrop's written reviews are positive against 100% of OTO Life's.

UpkeepUpdate frequency

Tempdrop ships an update every 2 months, OTO Life every 2 weeks. The most recent releases landed on October 18, 2026 and September 17, 2026 respectively.

Scorecard7 real differences · 3 level
Tempdrop versus OTO Life: the parameters behind the verdict, then further details
ParameterTempdropOTO Life
PriceFreeFree
Rating4.2 (711 ratings)5.0 (3 ratings) — better
Positive reviews38.7% of reviews100.0% of reviews — better
Number of ratings711 — better3
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better16.2
Further details — not scored
Size103 MB94 MB
Age rating17+17+
DeveloperTempdrop IncOTO

Customer experience

Tempdrop

All ratings711 ratings
Positive80.3%
Neutral6.2%
Negative13.5%
Written reviews168 reviews
Positive38.7%
Neutral18.5%
Negative42.9%

OTO Life

All ratings3 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

OTO Life

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
None

OTO Life

No in-app purchases

Questions

Is Tempdrop free?
Tempdrop is free to download, with in-app purchases available.
Is OTO Life free?
OTO Life is free to download, with no in-app purchases.
Which has better reviews, Tempdrop or OTO Life?
OTO Life is rated higher. Tempdrop averages 4.2 out of 5 from 711 ratings, while OTO Life averages 5.0 from 3 ratings.
Do Tempdrop or OTO Life have ads?
Neither Tempdrop nor OTO Life shows ads.
Which is updated more often, Tempdrop or OTO Life?
Tempdrop ships an update every 2 months, and OTO Life every 2 weeks. Most recently, Tempdrop was updated on October 18, 2026 and OTO Life on September 17, 2026.

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