Chart Neo vs NFP Calendar
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Chart Neo
This app simplifies menstrual cycle tracking by combining proven methods into an easy-to-use interface. It offers fast recording, offline functionality, and detailed chart viewing, with an accompanying web portal for advanced features and advisor interaction.
- Combines proven charting methods
- Fast and easy sign recording
- Offline functionality
- View historical charts
- Web portal access
- Share with spouse/devices
- Apple Watch companion app
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Creighton. Sympto-Thermal. Marquette. Billings. So many different methods to track your menstrual cycle. It can be confusing to find one that works for you. Neo takes the proven elements from these and many others to create an easy, fast, and powerful way to chart. - Free *45 Day* trial. We want to be sure the app is working well for you! Very low cost afterward. - Starts up faster than any other charting app. Super easy to record your sign and get on with your life. - Still works without a cell or WiFi signal. Often there is not a good signal where you may be recording your signs! - View your chart on your device, going as far back as you like. View multiple cycles at once! - Access to a powerful web portal where you can create PDFs of your chart, interact with an advisor, and more. - Share with your spouse! Share your account across multiple devices. - Apple Watch companion app - Optional HealthKit integration - Continuous updates and new features added thanks to feedback from users
NFP Calendar
Track your fertility naturally using various methods like Creighton or Billings. Record daily observations, manage your cycle, and export data for your instructor or doctor. Designed specifically for Natural Family Planning users.
- Record mucus observations
- Track menstrual flow
- Log intercourse timing
- Automatic cycle detection
- Generate PDF charts
- Export data as JSON
- iCloud sync
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Track your fertility naturally with a beautiful, intuitive charting app designed for Natural Family Planning methods. NFP Fertility Tracker helps you record daily fertility observations following Creighton Model, Billings, or other mucus-based NFP methods. Whether you're trying to conceive or avoid pregnancy naturally, this app gives you everything you need to chart with confidence. DAILY CHARTING MADE SIMPLE - Record mucus observations: color, sensation, and stretch - Track menstrual flow intensity (heavy, moderate, light, spotting) - Log intercourse timing and frequency - Mark peak days and cycle starts - Add personal notes to any day POWERFUL CYCLE MANAGEMENT - Automatic cycle detection and numbering - Smart handling of spotting vs. true periods - View your complete cycle history at a glance - Navigate cycles easily with calendar and list views EXPORT & BACKUP - Generate beautiful PDF charts for your instructor or doctor - Export your data as JSON for backup - iCloud sync keeps your data safe across devices DESIGNED FOR NFP USERS Built specifically for fertility awareness methods, not just another period tracker. Every feature is tailored to the vocabulary and workflow of NFP charting. Your fertility data stays private on your device. No account required. Start charting your fertility journey today.
Screenshots
Verdict
The clearest difference is in-app purchases: NFP Calendar at none against Chart Neo's 2. NFP Calendar also leads on rating (5.0 vs 4.8). Chart Neo's advantage is ratings volume (72 vs 1) and device support (4 vs 2). On price, update cadence and 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
Both are free to download. Chart Neo sells 2 one-off in-app purchases. NFP Calendar asks for nothing beyond the download.
NFP Calendar holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Chart Neo has 72 ratings behind it against 1, so its average is the more settled of the two.
Chart Neo ships an update every 6 weeks, NFP Calendar monthly. The most recent releases landed on September 24, 2026 and September 18, 2026 respectively.
| Parameter | Chart Neo | NFP Calendar |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (72 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 79.5% of reviews | — |
| Number of ratings | 72 — better | 1 |
| Update frequency | Every 6 weeks | Monthly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPad |
| Requires iOS | 13.6 — better | 26.0 |
| Further details — not scored | ||
| Size | 15 MB | 8 MB |
| Age rating | 12+ | 12+ |
| Developer | NeoFertility LLC | Esteban Cervera |
In-app purchases
Chart Neo
- One Year of Chart Neo$19.99
- Cycle Charting Basics$99.99
NFP Calendar
No in-app purchases





