# SHO vs Reverse Flow

The clearest difference is in-app purchases: SHO at none against Reverse Flow's 4. SHO also leads on iOS requirement (9.0 vs 15.0). Reverse Flow's advantage is update cadence (weekly vs every 10 months). On price, ads and device support there is nothing between them.

Both are free to download. Reverse Flow sells 4 in-app purchases, starting at $2.99 per month. SHO asks for nothing beyond the download.

SHO ships an update every 10 months, Reverse Flow weekly. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | SHO | Reverse Flow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (5 ratings)](https://appshunter.io/ios/app/reverse-flow-fire-hydraulics/id6775030535/reviews)** |
| Number of ratings | — | **5** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 months | **Weekly** |
| Monetization | — | Free |
| Size | 90 MB | 8 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Task Force Tips](https://appshunter.io/developer/1447418344) | [DEREK ANDREW MURDOCK](https://appshunter.io/developer/6775030537) |

## What reviewers say

### SHO

[App page](https://appshunter.io/ios/app/sho-gauge/id1611235398)

**In-app purchases:** none


### Reverse Flow

[App page](https://appshunter.io/ios/app/reverse-flow-fire-hydraulics/id6775030535)

This professional fireground hydraulics platform assists firefighters and pump operators in calculating complex flow rates, pump discharge pressures, and relay pumping requirements. It supports various nozzle types and allows for custom hose coefficients and elevation adjustments for accurate operational planning and decision support.

**Highlights:** Reverse Flow calculations, Required PDP calculations, Relay Pumping calculations, Split Lay analysis, Pump Chart storage, Nozzle support, Custom hose coefficients

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Reverse Flow Monthly Support $3 | $2.99 | per month |
| Reverse Flow Monthly Support $10 | $9.99 | per month |
| Reverse Flow One-Time Support $5 | $4.99 | one-time |
| Reverse Flow Pro | $4.99 | one-time |


## Frequently asked questions

### Is SHO free?

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

### Is Reverse Flow free?

Reverse Flow is free to download, with in-app purchases available.

### Do SHO or Reverse Flow have ads?

Neither SHO nor Reverse Flow shows ads.

### Which is updated more often, SHO or Reverse Flow?

SHO ships an update every 10 months, and Reverse Flow weekly. Most recently, SHO was updated on November 7, 2026 and Reverse Flow on October 31, 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.*