# E vs ondo.

The clearest difference is update cadence: ondo. at every 3 days against E's every 3 months. E's advantage is iOS requirement (15.6 vs 18.0). 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.

E ships an update every 3 months, ondo. every 3 days. Both last shipped on October 2, 2026.

## The numbers

| Metric | E | ondo. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/e-size/id6445945414/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 days** |
| Monetization | Free | — |
| Size | 33 MB | 3 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [AIVA LLC](https://appshunter.io/developer/1662107707) | [Trinx Solutions](https://appshunter.io/developer/1890765614) |

## What reviewers say

### E

[App page](https://appshunter.io/ios/app/e-size/id6445945414)

Easily measure your foot size and find the perfect shoe size. Save measurements for yourself and loved ones, and share them to ensure accurate purchases or gifts.

**Highlights:** Measure foot size, Select shoe size, Save multiple measurements, Share measurements, Family and friend profiles

**Features:** macOS Compatibility

**In-app purchases:** none


### ondo.

[App page](https://appshunter.io/ios/app/ondo/id6763930277)

**In-app purchases:** none


## Frequently asked questions

### Is E free?

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

### Is ondo. free?

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

### Do E or ondo. have ads?

Neither E nor ondo. shows ads.

### Which is updated more often, E or ondo.?

E ships an update every 3 months, and ondo. every 3 days. Most recently, E was updated on October 2, 2026 and ondo. on October 2, 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.*