Period vs Vainly Marquette Method™ NFP
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Period
Track your menstrual cycle, log period dates, ovulation test results, and symptoms. Gain insights into fertility probability based on your cycle length. This app helps predict periods and monitor cycles.
- Menstrual cycle tracking
- Period logging
- Ovulation test logging
- Symptom tracking
- Fertility probability insights
- Cycle length comparison
Read full descriptionHide full description
View where you are in your cycle with the Period Tracker app. You have the option to manually log your periods, ovulation test results and keep track of your menstrual cycle symptoms. Get insights into how the probability of peak fertility varies for women with the same cycle length as you. This app is designed for use by women who want to predict their periods, track their cycles or try for a baby. It should not be used as a method of contraception.
Vainly Marquette Method™ NFP
This app helps users track their menstrual cycles and fertility signs using the Marquette Method. It provides personalized trends and predictions based on logged data, supporting family planning goals with a focus on privacy and data security.
- Log menstrual cycles and hormone readings
- Identify fertile and infertile days
- Track intimacy events
- View cycle statistics and trends
- Securely back up and restore data
- Evidence-based fertility predictions
Read full descriptionHide full description
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 in-app purchases: Period at none against Vainly Marquette Method™ NFP's 2. Period also leads on ratings volume (2.9K vs 1) and update cadence (monthly vs every 3 months). On price, rating, ads 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
Both are free to download. Vainly Marquette Method™ NFP sells 2 in-app purchases, starting at $4.99 per month. Period asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.9 for Period against 5.0 for Vainly Marquette Method™ NFP. That said, the two scores are not equally well evidenced: Period has 2.9K ratings behind it against 1, so its average is the more settled of the two.
Period ships an update monthly, Vainly Marquette Method™ NFP every 3 months. The most recent releases landed on November 8, 2026 and October 30, 2026 respectively.
| Parameter | Period | Vainly Marquette Method™ NFP |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (2.9K ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 53.8% of reviews | — |
| Number of ratings | 2.9K — better | 1 |
| Update frequency | Monthly — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Subscription |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 18.2 |
| Further details — not scored | ||
| Size | 56 MB | 3 MB |
| Age rating | 12+ | 17+ |
| Developer | SPD Development Company Ltd | Vainly |
Bugs and requests
Period
Reported bugs
3 issues- Dates and data getting changed after updates
- Calendar not populating after updates
- Whole calendar getting erased after updates
Requested features
2 requests- Add option to log basal body temperature
- Improve notification customization
Vainly Marquette Method™ NFP
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Period
No in-app purchases
Vainly Marquette Method™ NFP
- Monthly access1 Month trial$4.991 Month
- Monthly Access1 Month trial$4.991 Month
Questions
Is Period free?
Is Vainly Marquette Method™ NFP free?
Which has better reviews, Period or Vainly Marquette Method™ NFP?
Do Period or Vainly Marquette Method™ NFP have ads?
Which is updated more often, Period or Vainly Marquette Method™ NFP?
Other comparisons
