# CST ESS vs Idemitsu Engage

The clearest difference is update cadence: Idemitsu Engage at every 3 weeks against CST ESS's every 29 months. Idemitsu Engage also leads on device support. CST ESS's advantage is iOS requirement (15.6 vs 18.6). 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.

CST ESS ships an update every 29 months, Idemitsu Engage every 3 weeks. The most recent releases landed on September 14, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | CST ESS | Idemitsu Engage |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | Every 29 months | **Every 3 weeks** |
| Size | 37 MB | 43 MB |
| Requires iOS | **15.6** | 18.6 |
| Devices | — | **iPhone, iPad** |
| Age rating | 4+ | 17+ |
| Developer | [无锡乐伏网络科技有限公司](https://appshunter.io/developer/1197246083) | [Idemitsu Lube India Private Limited](https://appshunter.io/developer/1725118686) |

## What reviewers say

### CST ESS

[App page](https://appshunter.io/ios/app/cst-ess/id6447654088)

**In-app purchases:** none


### Idemitsu Engage

[App page](https://appshunter.io/ios/app/idemitsu-engage/id6475770037)

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

**In-app purchases:** none


## Frequently asked questions

### Is CST ESS free?

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

### Is Idemitsu Engage free?

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

### Which is updated more often, CST ESS or Idemitsu Engage?

CST ESS ships an update every 29 months, and Idemitsu Engage every 3 weeks. Most recently, CST ESS was updated on September 14, 2026 and Idemitsu Engage on September 16, 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.*