# iFertile vs e

The clearest difference is review sentiment: iFertile at 57% against e's 0%. iFertile also leads on rating (4.7 vs 3.0) and ratings volume (60 vs 1). e's advantage is update cadence (monthly vs every 24 months) and monetization model (free vs ad-supported). On price, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

iFertile holds the better App Store score, 4.7 against 3.0. That said, the two scores are not equally well evidenced: iFertile has 60 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 57% of iFertile's written reviews are positive against 0% of e's.

iFertile ships an update every 24 months, e monthly. The most recent releases landed on October 24, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | iFertile | e |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (60 ratings)](https://appshunter.io/ios/app/ifertile/id919367481/reviews)** | [3.0 (1 ratings)](https://appshunter.io/ios/app/e-billings-mob/id1642796709/reviews) |
| Number of ratings | **60** | 1 |
| Positive reviews | **57.1% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | — |
| Update frequency | Every 24 months | **Monthly** |
| Monetization | Ad-supported | **Free** |
| Size | 5 MB | 52 MB |
| Requires iOS | **13.0** | 14.0.0 |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | +4 | 17+ |
| Developer | [FBF Sistemas LTDA](https://appshunter.io/developer/321061871) | [VENDA NO DIGITAL SERVICOS DE MARKETING DIGITAL LTDA](https://appshunter.io/developer/1642796711) |

## What reviewers say

### iFertile

[App page](https://appshunter.io/ios/app/ifertile/id919367481)

This app estimates a woman's fertile period using the rhythm method. It's designed for those trying to conceive by identifying optimal times for pregnancy. While it can be used as a contraceptive, its effectiveness is limited.

**Highlights:** Fertile period estimation, Rhythm method calculations, Pregnancy planning tool, Contraceptive method (limited security)

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

**In-app purchases:** none


### 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 iFertile free?

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

### Is e free?

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

### Which has better reviews, iFertile or e?

iFertile is rated higher. iFertile averages 4.7 out of 5 from 60 ratings, while e averages 3.0 from 1 ratings.

### Which is updated more often, iFertile or e?

iFertile ships an update every 24 months, and e monthly. Most recently, iFertile was updated on October 24, 2026 and e on October 21, 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.*