# flex vs Esupl KDS

The clearest difference is update cadence: flex at weekly against Esupl KDS's every 3 weeks. flex also leads on iOS requirement (12.0 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.

flex ships an update weekly, Esupl KDS every 3 weeks. The most recent releases landed on September 20, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | flex | Esupl KDS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 weeks |
| Size | 22 MB | 28 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Flex Wash Technologies, Inc](https://appshunter.io/developer/1667703436) | [ESUPL TECHNOLOGIES, INC.](https://appshunter.io/developer/1579242842) |

## What reviewers say

### flex

[App page](https://appshunter.io/ios/app/flex-wash-vector/id1667703134)

**Features:** macOS Compatibility

**In-app purchases:** none


### Esupl KDS

[App page](https://appshunter.io/ios/app/esupl-kds/id6447855799)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is flex free?

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

### Is Esupl KDS free?

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

### Do flex or Esupl KDS have ads?

Neither flex nor Esupl KDS shows ads.

### Which is updated more often, flex or Esupl KDS?

flex ships an update weekly, and Esupl KDS every 3 weeks. Most recently, flex was updated on September 20, 2026 and Esupl KDS on October 7, 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.*