# NFP Charting vs NFP Calendar

The clearest difference is review sentiment: NFP Calendar at 100% against NFP Charting's 49%. NFP Calendar also leads on in-app purchases (none vs 6) and rating (4.7 vs 4.3). NFP Charting's advantage is iOS requirement (12.0 vs 26.0). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. NFP Charting sells 6 one-off in-app purchases. NFP Calendar asks for nothing beyond the download.

NFP Calendar holds the better App Store score, 4.7 against 4.3. Both are backed by a comparable volume of ratings — 6 and 3 respectively. Written reviews point the same way: 49% of NFP Charting's written reviews are positive against 100% of NFP Calendar's.

NFP Charting ships an update every 4 months, NFP Calendar every 2 months. The most recent releases landed on October 23, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | NFP Charting | NFP Calendar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (6 ratings)](https://appshunter.io/ios/app/nfp-charting/id300767738/reviews) | **[4.7 (3 ratings)](https://appshunter.io/ios/app/nfp-calendar/id6751753267/reviews)** |
| Number of ratings | **6** | 3 |
| Positive reviews | 49.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 6 MB | 8 MB |
| Requires iOS | **12.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Lawson Culver](https://appshunter.io/developer/300767741) | [Esteban Cervera](https://appshunter.io/developer/1209785445) |

## What reviewers say

### NFP Charting

[App page](https://appshunter.io/ios/app/nfp-charting/id300767738)

Track your Natural Family Planning (NFP) charts online using the Billings Ovulation Method. This app allows you to enter data, share charts with your teacher, and view current and previous cycles. It is designed for users already trained in the Billings Ovulation Method.

**Highlights:** Track NFP charting data online, Share charts with teachers, Email charts, View current and previous cycles, Leave notes for teachers, Access from computer

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One Month Account Extension | $2.99 | one-time |
| One Month | $2.99 | one-time |
| Six Months Account Extension | $11.99 | one-time |
| Six Months | $14.99 | one-time |
| One Year Account Extension | $19.99 | one-time |
| One Year | $24.99 | one-time |

**What reviewers like**

- 👍 Convenient chart access on phone
- 👍 Replaces paper charts
- 👍 Compatible with Creighton/Billings
- 👍 Easy to share with instructor/doctor
- 👍 Good for tracking fertility

**What reviewers complain about**

- 💸 Expensive subscription fees
- 💸 Not a one-time purchase option
- 💸 Perceived as a rip-off
- 🐛 App crashes/stops working
- 🐛 Website down

**Reported bugs**

- Unable to log in
- App stopped working
- Website is down
- Overlapping/misaligned on iPhone
- Email version not printable

**Requested features**

- Ability to send one chart at a time
- Update app for iPhone compatibility
- Make chart printable (PDF)
- Improve interface/design
- Add temperature tracking


### NFP Calendar

[App page](https://appshunter.io/ios/app/nfp-calendar/id6751753267)

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.

**Highlights:** Record mucus observations, Track menstrual flow, Log intercourse timing, Automatic cycle detection, Generate PDF charts, Export data as JSON, iCloud sync

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is NFP Charting free?

NFP Charting is free to download, with in-app purchases available.

### Is NFP Calendar free?

NFP Calendar is free to download, with no in-app purchases.

### Which has better reviews, NFP Charting or NFP Calendar?

NFP Calendar is rated higher. NFP Charting averages 4.3 out of 5 from 6 ratings, while NFP Calendar averages 4.7 from 3 ratings.

### Do NFP Charting or NFP Calendar have ads?

Neither NFP Charting nor NFP Calendar shows ads.

### Which is updated more often, NFP Charting or NFP Calendar?

NFP Charting ships an update every 4 months, and NFP Calendar every 2 months. Most recently, NFP Charting was updated on October 23, 2026 and NFP Calendar on October 22, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*