# Nidus vs e

The clearest difference is update cadence: Nidus at fortnightly against e's monthly. Nidus also leads on device support and iOS requirement (10.0 vs 14.0.0). On price and in-app purchases there is nothing between them.

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

Nidus ships an update fortnightly, e monthly. The most recent releases landed on October 27, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Nidus | e |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (1 ratings)](https://appshunter.io/ios/app/e-billings-mob/id1642796709/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | — |
| Update frequency | **Fortnightly** | Monthly |
| Monetization | — | Free |
| Size | 99 MB | 52 MB |
| Requires iOS | **10.0** | 14.0.0 |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 17+ | 17+ |
| Developer | [SRH Juiz de Fora LTDA](https://appshunter.io/developer/1597477898) | [VENDA NO DIGITAL SERVICOS DE MARKETING DIGITAL LTDA](https://appshunter.io/developer/1642796711) |

## What reviewers say

### Nidus

[App page](https://appshunter.io/ios/app/nidus/id1597477896)

**Features:** macOS Compatibility

**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 Nidus free?

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

### Is e free?

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

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

Nidus ships an update fortnightly, and e monthly. Most recently, Nidus was updated on October 27, 2026 and e on October 30, 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.*