# E vs Opalex Mobile

The clearest difference is update cadence: E at every 10 days against Opalex Mobile's monthly. On price, in-app purchases, device support 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.

E ships an update every 10 days, Opalex Mobile monthly. The most recent releases landed on October 18, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | E | Opalex Mobile |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | **Every 10 days** | Monthly |
| Size | 40 MB | 22 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SARL SPHERE](https://appshunter.io/developer/1551641245) | [ACD Groupe](https://appshunter.io/developer/1033556694) |

## What reviewers say

### E

[App page](https://appshunter.io/ios/app/e-estimation/id1551641243)

**Features:** macOS Compatibility

**In-app purchases:** none


### Opalex Mobile

[App page](https://appshunter.io/ios/app/opalex-mobile/id6758104104)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is E free?

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

### Is Opalex Mobile free?

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

### Which is updated more often, E or Opalex Mobile?

E ships an update every 10 days, and Opalex Mobile monthly. Most recently, E was updated on October 18, 2026 and Opalex Mobile on October 8, 2026.

---

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