# Geocene vs HydraAtlas

The clearest difference is update cadence: HydraAtlas at every 4 days against Geocene's every 5 weeks. Geocene's advantage is iOS requirement (13.0 vs 17.6). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Geocene against 5.0 for HydraAtlas. Both are backed by a comparable volume of ratings — 2 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Geocene ships an update every 5 weeks, HydraAtlas every 4 days. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Geocene | HydraAtlas |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/geocene/id1484750162/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/hydraatlas/id6749492232/reviews) |
| Number of ratings | 2 | **3** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 4 days** |
| Monetization | Free | Free |
| Size | 11 MB | 17 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Geocene Inc.](https://appshunter.io/developer/1460037463) | [Kevin Bullock](https://appshunter.io/developer/1504358834) |

## What reviewers say

### Geocene

[App page](https://appshunter.io/ios/app/geocene/id1484750162)

Interact with Geocene Dots by starting and stopping missions, downloading data, and viewing or editing mission details. This utility app allows for comprehensive management of your Geocene Dot interactions.

**Highlights:** Interact with Geocene Dots, Start and stop missions, Download mission data, View mission data, Edit mission data

**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 Geocene free?

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

### Is HydraAtlas free?

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

### Which has better reviews, Geocene or HydraAtlas?

Geocene and HydraAtlas are both rated 5.0 out of 5 on the App Store, from 2 and 3 ratings respectively.

### Do Geocene or HydraAtlas have ads?

Neither Geocene nor HydraAtlas shows ads.

### Which is updated more often, Geocene or HydraAtlas?

Geocene ships an update every 5 weeks, and HydraAtlas every 4 days. Most recently, Geocene was updated on November 3, 2026 and HydraAtlas on October 30, 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.*