# E vs OneCST

The clearest difference is update cadence: OneCST at every 2 days against E's every 2 months. E's advantage is iOS requirement (10.0 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.

E ships an update every 2 months, OneCST every 2 days. The most recent releases landed on October 11, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | E | OneCST |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 days** |
| Size | 14 MB | 54 MB |
| Requires iOS | **10.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Eplusi Technology Company Limited](https://appshunter.io/developer/1406769609) | [MobiFone](https://appshunter.io/developer/437730616) |

## What reviewers say

### E

[App page](https://appshunter.io/ios/app/e-sensor-iot/id1406769610)

**Features:** macOS Compatibility

**In-app purchases:** none


### OneCST

[App page](https://appshunter.io/ios/app/onecst/id6451189988)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is E free?

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

### Is OneCST free?

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

### Do E or OneCST have ads?

Neither E nor OneCST shows ads.

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

E ships an update every 2 months, and OneCST every 2 days. Most recently, E was updated on October 11, 2026 and OneCST on October 13, 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.*