Tempdrop vs Vainly Marquette Method™ NFP
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
Vainly Marquette Method™ NFP
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Vainly — A Marquette Method™ Algorithm Tracking App Please note: All features in Vainly are available only with a paid monthly subscription. Start with a 1-month free trial, then choose a paid plan to continue to access all features. Vainly helps those using the Marquette Method of Natural Family Planning (NFP) to take control of reproductive health by tracking cycles, fertility signs, and intimacy events in one secure place. With your subscription, you can: - Log menstrual cycles and hormone readings - Support your Marquette Method NFP practice with evidence-based algorithms to identify fertile and infertile days - Track intimacy events to support family planning goals - View cycle statistics and personalized trends - Securely back up and restore your health data with built-in encryption Why Vainly? - Focused on privacy: your personal health data is encrypted and stored only on your device - Designed for simplicity: clean interface, easy daily logging - Evidence-based: fertility predictions are based on the proven Marquette Method of Natural Family Planning Important Notes Vainly is an independent app and is not affiliated with or endorsed by Marquette University. The Marquette Method requires use of a Clearblue fertility monitor, which is not included with this app. Your health. Your data. Your choice. Vainly never sells or shares your personal data. With local encrypted backup and restore, you stay in control of your reproductive health information. Terms of Service: https://www.vainly.com/terms Privacy Policy: https://vainly.com/privacy License Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is device support: Tempdrop at 3 against Vainly Marquette Method™ NFP's 1. Tempdrop also leads on iOS requirement (15.0 vs 18.2). On price, update cadence, ads and in-app purchases 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
Both are free to download. Tempdrop sells 6 in-app purchases, starting at $2.99 per month and Vainly Marquette Method™ NFP sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
Tempdrop ships an update every 2 months, Vainly Marquette Method™ NFP every 3 months. The most recent releases landed on October 18, 2026 and October 7, 2026 respectively.
| Parameter | Tempdrop | Vainly Marquette Method™ NFP |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (711 ratings) — better | — |
| Positive reviews | 38.7% of reviews | — |
| Number of ratings | 711 — better | — |
| Update frequency | Every 2 months — better | Every 3 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 18.2 |
| Further details — not scored | ||
| Size | 103 MB | 3 MB |
| Age rating | 17+ | 17+ |
| Developer | Tempdrop Inc | Vainly |
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
Vainly Marquette Method™ NFP
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
Vainly Marquette Method™ NFP
- Monthly access1 Month trial$4.991 Month
- Monthly Access1 Month trial$4.991 Month
Questions
Is Tempdrop free?
Is Vainly Marquette Method™ NFP free?
Do Tempdrop or Vainly Marquette Method™ NFP have ads?
Which is updated more often, Tempdrop or Vainly Marquette Method™ NFP?
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