# Chart Neo vs e

The clearest difference is review sentiment: Chart Neo at 80% against e's 0%. Chart Neo also leads on rating (4.8 vs 3.0) and ratings volume (72 vs 1). e's advantage is in-app purchases (none vs 2). On price, update cadence and iOS requirement there is nothing between them.

Both are free to download. Chart Neo sells 2 one-off in-app purchases. e asks for nothing beyond the download.

Chart Neo holds the better App Store score, 4.8 against 3.0. 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. Written reviews point the same way: 80% of Chart Neo's written reviews are positive against 0% of e's.

Chart Neo ships an update every 6 weeks, e monthly. The most recent releases landed on September 24, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Chart Neo | e |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (72 ratings)](https://appshunter.io/ios/app/chart-neo/id1376976631/reviews)** | [3.0 (1 ratings)](https://appshunter.io/ios/app/e-billings-mob/id1642796709/reviews) |
| Number of ratings | **72** | 1 |
| Positive reviews | **79.5% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | — |
| Update frequency | Every 6 weeks | **Monthly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 15 MB | 52 MB |
| Requires iOS | **13.6** | 14.0.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | — |
| Age rating | 12+ | 17+ |
| Developer | [NeoFertility LLC](https://appshunter.io/developer/1837439527) | [VENDA NO DIGITAL SERVICOS DE MARKETING DIGITAL LTDA](https://appshunter.io/developer/1642796711) |

## What reviewers say

### Chart Neo

[App page](https://appshunter.io/ios/app/chart-neo/id1376976631)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One Year of Chart Neo | $19.99 | one-time |
| Cycle Charting Basics | $99.99 | one-time |


### e

[App page](https://appshunter.io/ios/app/e-billings-mob/id1642796709)

This app helps users track daily observations related to a specific fertility awareness method. It allows for easy viewing of cycle graphs on various devices and facilitates sharing information with partners and instructors. It is intended for users already familiar with the Billings Ovulation Method.

**Highlights:** Daily observation notes, Cycle graph visualization, Cross-device access, Information sharing, Method-specific tracking

**In-app purchases:** none


## Frequently asked questions

### Is Chart Neo free?

Chart Neo is free to download, with in-app purchases available.

### Is e free?

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

### Which has better reviews, Chart Neo or e?

Chart Neo is rated higher. Chart Neo averages 4.8 out of 5 from 72 ratings, while e averages 3.0 from 1 ratings.

### Which is updated more often, Chart Neo or e?

Chart Neo ships an update every 6 weeks, and e monthly. Most recently, Chart Neo was updated on September 24, 2026 and e on September 17, 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.*