# Layout Tool vs HydraAtlas

The clearest difference is update cadence: HydraAtlas at every 4 days against Layout Tool's every 3 weeks. 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.

Layout Tool ships an update every 3 weeks, HydraAtlas every 4 days. The most recent releases landed on September 10, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Layout Tool | HydraAtlas |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/hydraatlas/id6749492232/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Monetization | — | Free |
| Size | 0 MB | 17 MB |
| Requires iOS | 18.0 | **17.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [CreationAct (Shanghai) Technology Co., Ltd.](https://appshunter.io/developer/1770311812) | [Kevin Bullock](https://appshunter.io/developer/1504358834) |

## What reviewers say

### Layout Tool

[App page](https://appshunter.io/ios/app/layout-tool/id6745318467)

**Features:** macOS Compatibility

**In-app purchases:** none


### HydraAtlas

[App page](https://appshunter.io/ios/app/hydraatlas/id6749492232)

This app provides detailed flood risk information for any US location using official FEMA data. It offers real-time updates on stream gauges, weather alerts, and radar, helping users make informed decisions about potential flood hazards.

**Highlights:** FEMA flood zone mapping, USGS stream gauge readings, National Weather Service alerts, Interactive weather radar, Save monitored locations, Emergency preparedness info

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Layout Tool free?

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

### Is HydraAtlas free?

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

### Do Layout Tool or HydraAtlas have ads?

Neither Layout Tool nor HydraAtlas shows ads.

### Which is updated more often, Layout Tool or HydraAtlas?

Layout Tool ships an update every 3 weeks, and HydraAtlas every 4 days. Most recently, Layout Tool was updated on September 10, 2026 and HydraAtlas 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.*