# Echospectra vs Hydrant Flow Test Calculator

The clearest difference is update cadence: Echospectra at weekly against Hydrant Flow Test Calculator's every 5 weeks. Hydrant Flow Test Calculator's advantage is iOS requirement (15.1 vs 17.0). On price, rating, ratings volume and ads 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 Echospectra against 5.0 for Hydrant Flow Test Calculator. Both are backed by a comparable volume of ratings — 3 and 3 respectively.

Echospectra ships an update weekly, Hydrant Flow Test Calculator every 5 weeks. The most recent releases landed on September 12, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Echospectra | Hydrant Flow Test Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/echospectra/id6469170522/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/hydrant-flow-test-calculator/id6759503350/reviews) |
| Number of ratings | 3 | 3 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 5 weeks |
| Monetization | Free | Free |
| Size | 98 MB | 38 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ax0n Intelligence Company](https://appshunter.io/developer/1711635616) | [Saleel Anthrathodiyil](https://appshunter.io/developer/1879071811) |

## What reviewers say

### 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


### Hydrant Flow Test Calculator

[App page](https://appshunter.io/ios/app/hydrant-flow-test-calculator/id6759503350)

This tool simplifies hydrant flow testing by calculating total GPM from pitot pressures. It allows for outlet settings, flow extrapolation with a Supply vs Demand curve, and plotting demand points for PASS/FAIL results. Save test data with location and project details for future reference.

**Highlights:** Calculate total GPM from pitot pressures, Configure outlet diameter and hydrant coefficients, Extrapolate flow with Supply vs Demand curve, Plot demand points for PASS/FAIL analysis, Save test results with date, time, and project info, Log hydrant locations via GPS, Review saved test history

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Echospectra free?

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

### Is Hydrant Flow Test Calculator free?

Hydrant Flow Test Calculator is free to download, with no in-app purchases.

### Which has better reviews, Echospectra or Hydrant Flow Test Calculator?

Echospectra and Hydrant Flow Test Calculator are both rated 5.0 out of 5 on the App Store, from 3 and 3 ratings respectively.

### Do Echospectra or Hydrant Flow Test Calculator have ads?

Neither Echospectra nor Hydrant Flow Test Calculator shows ads.

### Which is updated more often, Echospectra or Hydrant Flow Test Calculator?

Echospectra ships an update weekly, and Hydrant Flow Test Calculator every 5 weeks. Most recently, Echospectra was updated on September 12, 2026 and Hydrant Flow Test Calculator 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.*