# Keysemble vs HydroSewer

The clearest difference is in-app purchases: Keysemble at none against HydroSewer's 1. Keysemble also leads on update cadence (weekly vs every 3 weeks). HydroSewer's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 18.6). On price and ads there is nothing between them.

Both are free to download. HydroSewer sells 1 one-off in-app purchase. Keysemble asks for nothing beyond the download.

Keysemble ships an update weekly, HydroSewer every 3 weeks. The most recent releases landed on September 14, 2026 and August 21, 2026 respectively.

## The numbers

| Metric | Keysemble | HydroSewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/keysemble/id6740478334/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 weeks |
| Monetization | Free | — |
| Size | 6 MB | 24 MB |
| Requires iOS | 18.6 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [JINSU GU](https://appshunter.io/developer/1713378081) | [Transparent Blue Water LLC](https://appshunter.io/developer/1847968351) |

## What reviewers say

### Keysemble

[App page](https://appshunter.io/ios/app/keysemble/id6740478334)

Create and customize your own mobile keyboard layout and appearance. Choose from default themes or design your unique keyboard with extensive editing options for colors, height, and key actions. Easily switch to your personalized keyboard after setup.

**Highlights:** Custom keyboard layout creation, Detailed editing options, Theme customization (color, height, keys), Variety of default keyboard layouts, Easy switching to custom keyboards, Help guide within the app

**In-app purchases:** none


### HydroSewer

[App page](https://appshunter.io/ios/app/hydrosewer-drainage-network/id6754671899)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HydroSewer Pro | $14.99 | one-time |


## Frequently asked questions

### Is Keysemble free?

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

### Is HydroSewer free?

HydroSewer is free to download, with in-app purchases available.

### Do Keysemble or HydroSewer have ads?

Neither Keysemble nor HydroSewer shows ads.

### Which is updated more often, Keysemble or HydroSewer?

Keysemble ships an update weekly, and HydroSewer every 3 weeks. Most recently, Keysemble was updated on September 14, 2026 and HydroSewer on August 21, 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.*