# HydroData vs Chronicle for Research

The clearest difference is iOS requirement: Chronicle for Research at 14.0 against HydroData's 17.6. On price, update cadence, ads 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.

HydroData ships an update monthly, Chronicle for Research every 4 weeks. The most recent releases landed on October 19, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | HydroData | Chronicle for Research |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.6 (5 ratings)](https://appshunter.io/ios/app/hydrodata/id1576887037/reviews)** | — |
| Number of ratings | **5** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 weeks** |
| Monetization | Free | — |
| Size | 38 MB | 4 MB |
| Requires iOS | 17.6 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Longitude 103](https://appshunter.io/developer/1576887039) | [Methodic, Inc.](https://appshunter.io/developer/1618305706) |

## What reviewers say

### HydroData

[App page](https://appshunter.io/ios/app/hydrodata/id1576887037)

This app enables field data collection with map integration to pinpoint features and track your location. It supports gathering field reports, well water levels, and dam inspection data, syncing it all to the cloud when convenient.

**Highlights:** Field data collection, Map-based feature selection, Location tracking, Cloud synchronization, Well water level logging, Dam inspection reports

**Features:** Vision Pro support

**In-app purchases:** none


### Chronicle for Research

[App page](https://appshunter.io/ios/app/chronicle-for-research/id1618305704)

**In-app purchases:** none


## Frequently asked questions

### Is HydroData free?

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

### Is Chronicle for Research free?

Chronicle for Research is free to download, with no in-app purchases.

### Do HydroData or Chronicle for Research have ads?

Neither HydroData nor Chronicle for Research shows ads.

### Which is updated more often, HydroData or Chronicle for Research?

HydroData ships an update monthly, and Chronicle for Research every 4 weeks. Most recently, HydroData was updated on October 19, 2026 and Chronicle for Research on October 4, 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.*