# USACE Savannah vs ESA DMPL Authenticator

The clearest difference is update cadence: ESA DMPL Authenticator at every 9 months against USACE Savannah's every 40 months. USACE Savannah's advantage is iOS requirement (7.0 vs 15). 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.

USACE Savannah ships an update every 40 months, ESA DMPL Authenticator every 9 months. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | USACE Savannah | ESA DMPL Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.2 (26 ratings)](https://appshunter.io/ios/app/usace-savannah/id903896243/reviews)** | — |
| Number of ratings | **26** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 40 months | **Every 9 months** |
| Monetization | Free | — |
| Size | 73 MB | 1 MB |
| Requires iOS | **7.0** | 15 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [U.S. Army Corps of Engineers](https://appshunter.io/developer/597234175) | [TSA Group Delft bv](https://appshunter.io/developer/970440379) |

## What reviewers say

### USACE Savannah

[App page](https://appshunter.io/ios/app/usace-savannah/id903896243)

Access official water management data for the U.S. Army Corps of Engineers, Savannah District. View rainfall and reservoir information, including discharge, levels, and projections for dams on the Savannah River.

**Highlights:** Provisional rainfall data, Reservoir level data, Discharge information, Reservoir projections, Corps-managed dam data, Savannah River dams

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

**In-app purchases:** none


### ESA DMPL Authenticator

[App page](https://appshunter.io/ios/app/esa-dmpl-authenticator/id1622186631)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is USACE Savannah free?

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

### Is ESA DMPL Authenticator free?

ESA DMPL Authenticator is free to download, with no in-app purchases.

### Do USACE Savannah or ESA DMPL Authenticator have ads?

Neither USACE Savannah nor ESA DMPL Authenticator shows ads.

### Which is updated more often, USACE Savannah or ESA DMPL Authenticator?

USACE Savannah ships an update every 40 months, and ESA DMPL Authenticator every 9 months. Most recently, USACE Savannah was updated on October 24, 2026 and ESA DMPL Authenticator on October 27, 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.*