MSTraining vs Period Prophet
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MSTraining
Read full descriptionHide full description
Training Plans*, Guided Runs**, Wellness Tips, and Running Challenges — Run towards your goals with MST. Find all the tools you need to enjoy running even more – from activity tracking to fitness advice. Pace yourself with the MSTraining community and prepare for the next 5k to 10k, Half Marathon, and beyond. Discover movement and set a new personal best with the support of the MSTraining community. Let’s sport together.
Period Prophet
Read full descriptionHide full description
Say goodbye to setting early alarms and fumbling with oral thermometers. Period Prophet turns your overnight sleeping wrist temperature into clear, actionable basal body temperature (BBT) insights. Wake up and instantly see where you are in your cycle—confirmed ovulation, period forecasts, and fertile days—without lifting a finger. KEY FEATURES: • Automatic Wrist Temp Tracking: Syncs seamlessly with your overnight wrist temperature to chart your personal biphasic curve. • Clear Ovulation Confirmation: Built on proven FAM / Sensiplan rules (6-low-3-high pattern) to verify true thermal shifts, not just calendar guesswork. • All-in-One Cycle Journal: Easily log flow, LH ovulation tests, intimacy, cervical mucus, and symptoms. Note fever, alcohol, or late nights to keep your charts accurate. • Wearable & Home Screen Ready: Quick-log directly from your watch; check current cycle phase on Home Screen widgets and Dynamic Island. • Phase-Based Healing: Soothing soundscapes, guided breathing, and gentle nutrition tips tailored to your follicular, luteal, and menstrual phases. • True On-Device Privacy: No sign-ups, no cloud accounts, and no ads. Your intimate health data stays securely on your iPhone, protected by Face ID. Who it’s for: • Anyone trying to conceive (TTC) who wants stress-free, automated BBT charting. • Anyone seeking a deeper, natural connection with their hormonal rhythm. • Health-conscious individuals who value total digital privacy over cloud subscriptions. Device Requirements: Requires a wrist-temperature-capable watch (Series 8 or later, Ultra) with Sleep Focus enabled. Manual temperature entry is also supported. Disclaimer: Period Prophet is for lifestyle, wellness, and educational purposes only and is not a medical device. It should not be used as a primary form of contraception or for medical diagnosis.
Screenshots
Verdict
The clearest difference is price: MSTraining at Free against Period Prophet's $0.99. MSTraining also leads on iOS requirement (12.0 vs 16.1). On update cadence, ads, in-app purchases 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
MSTraining is free to download; Period Prophet costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
MSTraining ships an update fortnightly, Period Prophet every 9 days. Both last shipped on September 17, 2026.
| Parameter | MSTraining | Period Prophet |
|---|---|---|
| Price | Free — better | $0.99 |
| Positive reviews | — | 100.0% of reviews |
| Update frequency | Fortnightly | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Requires iOS | 12.0 — better | 16.1 |
| Further details — not scored | ||
| Size | 84 MB | 229 MB |
| Age rating | 17+ | 17+ |
| Developer | Beijing MarvelSmart Technology Co., Ltd. | 福荣 贺 |
In-app purchases
MSTraining
No in-app purchases
Period Prophet
No in-app purchases





