Comparison

MSTraining vs Period Prophet

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

Head to head
About

MSTraining

Features
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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.

About

Period Prophet

Features
Read 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

MSTraining4 screens
Period Prophet4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

MSTraining ships an update fortnightly, Period Prophet every 9 days. Both last shipped on September 17, 2026.

Scorecard2 real differences · 5 level
MSTraining versus Period Prophet: the parameters behind the verdict, then further details
ParameterMSTrainingPeriod Prophet
PriceFree — better$0.99
Positive reviews—100.0% of reviews
Update frequencyFortnightlyEvery 9 days — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, Apple Watch
Requires iOS12.0 — better16.1
Further details — not scored
Size84 MB229 MB
Age rating17+17+
DeveloperBeijing MarvelSmart Technology Co., Ltd.福荣 贺

In-app purchases

None

MSTraining

No in-app purchases

None

Period Prophet

No in-app purchases

Questions

Is MSTraining free?
MSTraining is free to download, with no in-app purchases.
Is Period Prophet free?
Period Prophet costs $0.99, with no in-app purchases.
Do MSTraining or Period Prophet have ads?
Neither MSTraining nor Period Prophet shows ads.
Which is updated more often, MSTraining or Period Prophet?
MSTraining ships an update fortnightly, and Period Prophet every 9 days. Most recently, MSTraining was updated on September 17, 2026 and Period Prophet on September 17, 2026.

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