# Sonor vs E

The clearest difference is update cadence: Sonor at monthly against E's every 3 months. E's advantage is iOS requirement (13.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

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

Sonor ships an update monthly, E every 3 months. The most recent releases landed on September 6, 2026 and June 11, 2026 respectively.

## The numbers

| Metric | Sonor | E |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 3 months |
| Size | 38 MB | 21 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [TTTools](https://appshunter.io/developer/1686019168) | [Ulaanbaatar Railway, Mongolian-Russian JVC](https://appshunter.io/developer/1273656008) |

## What reviewers say

### Sonor

[App page](https://appshunter.io/ios/app/sonor-real-time-data/id6448738959)

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

**In-app purchases:** none


### E

[App page](https://appshunter.io/ios/app/e-normative/id6470155996)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sonor free?

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

### Is E free?

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

### Do Sonor or E have ads?

Neither Sonor nor E shows ads.

### Which is updated more often, Sonor or E?

Sonor ships an update monthly, and E every 3 months. Most recently, Sonor was updated on September 6, 2026 and E on June 11, 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.*