# USFS Risk Calculator vs Echospectra

The clearest difference is update cadence: Echospectra at weekly against USFS Risk Calculator's every 32 months. USFS Risk Calculator's advantage is iOS requirement (13.0 vs 17.0). 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.

USFS Risk Calculator ships an update every 32 months, Echospectra weekly. The most recent releases landed on September 10, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | USFS Risk Calculator | Echospectra |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/echospectra/id6469170522/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 32 months | **Weekly** |
| Monetization | — | Free |
| Size | 42 MB | 98 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [US Forest Service](https://appshunter.io/developer/949583790) | [Ax0n Intelligence Company](https://appshunter.io/developer/1711635616) |

## What reviewers say

### USFS Risk Calculator

[App page](https://appshunter.io/ios/app/usfs-risk-calculator/id1496807580)

**Features:** macOS Compatibility

**In-app purchases:** none


### Echospectra

[App page](https://appshunter.io/ios/app/echospectra/id6469170522)

This platform streamlines wildfire investigation documentation for field professionals. It replaces traditional paper forms and GPS units with a structured, offline-capable workflow. Capture evidence, link images to locations, and generate courtroom-ready reports efficiently.

**Highlights:** Structured indicator mapping, One-click defensible photo logs, Offline map reliability, Export-ready case packages, View-only and scoped-edit sharing

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

**In-app purchases:** none


## Frequently asked questions

### Is USFS Risk Calculator free?

USFS Risk Calculator is free to download, with no in-app purchases.

### Is Echospectra free?

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

### Do USFS Risk Calculator or Echospectra have ads?

Neither USFS Risk Calculator nor Echospectra shows ads.

### Which is updated more often, USFS Risk Calculator or Echospectra?

USFS Risk Calculator ships an update every 32 months, and Echospectra weekly. Most recently, USFS Risk Calculator was updated on September 10, 2026 and Echospectra on September 12, 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.*