Tempdrop vs Sweattimer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Basal body temperature tracking
- Ovulation pinpointing
- Menstrual cycle prediction
- Hormonal fluctuation correlation
- Fertility awareness support
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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
Sweattimer
This app provides audible and visual cues to manage workout intervals, making exercises more efficient. It's perfect for Tabata routines and keeps your screen active so you can easily track your progress. Supports multiple languages for a personalized experience.
- Audible and visual cues
- Manages active and rest times
- Ideal for Tabata routines
- Multilingual interface
- Keeps screen active
- Easy transition between presets
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Exercise timer for transitions between active time and rest time. Provides audible and visual cues to make workouts more efficient. Ideal for any Tabata based routine. - Multilingual interface - Keeps screen active to view timer during workout - Easy transition between workout presets
Screenshots
Verdict
The clearest difference is review sentiment: Sweattimer at 100% against Tempdrop's 38%. Sweattimer also leads on rating (5.0 vs 4.2) and in-app purchases (none vs 6). Tempdrop's advantage is price (Free vs $1.99) and ratings volume (710 vs 1). On ads 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
Tempdrop is free to download; Sweattimer costs $1.99 up front. Tempdrop sells 6 in-app purchases, starting at $2.99 per month. Sweattimer asks for nothing beyond the download.
Sweattimer holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Tempdrop has 710 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 Sweattimer's.
Tempdrop ships an update every 3 months, Sweattimer every 8 months. The most recent releases landed on October 13, 2026 and September 20, 2026 respectively.
| Parameter | Tempdrop | Sweattimer |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 4.2 (710 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 38.3% of reviews | 100.0% of reviews — better |
| Number of ratings | 710 — better | 1 |
| Update frequency | Every 3 months — better | Every 8 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 103 MB | 1 MB |
| Age rating | 17+ | 4+ |
| Developer | Tempdrop Inc | QA3 Technologies LLC |
Customer experience
Tempdrop
Sweattimer
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
Sweattimer
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Tempdrop
- 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
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- 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
Sweattimer
No in-app purchases
