# SWPPP vs Silt

The clearest difference is iOS requirement: Silt at 15.1 against SWPPP's 17.0. 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.

SWPPP ships an update every 3 weeks, Silt monthly. The most recent releases landed on October 4, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | SWPPP | Silt |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/swppp/id1384754102/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free | — |
| Size | 47 MB | 35 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Real Time Risk Solutions, LLC](https://appshunter.io/developer/943293021) | [INcontrol360 LLC](https://appshunter.io/developer/1702204134) |

## What reviewers say

### SWPPP

[App page](https://appshunter.io/ios/app/swppp/id1384754102)

Streamline stormwater pollution prevention inspections with advanced analytics for compliance and transparency. Create custom plans, conduct site inspections, and generate reports with photos and notes, all accessible from any mobile device. The app works offline and allows for voice dictation.

**Highlights:** Customizable plan development checklists, Mobile inspection and corrective action forms, Digital signatures and unlimited photo uploads, Voice dictation for notes, Offline functionality, Cloud-based file storage and access, Customizable reports with company branding

**Features:** Vision Pro support

**In-app purchases:** none


### Silt

[App page](https://appshunter.io/ios/app/silt-tracker/id6745343917)

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

**In-app purchases:** none


## Frequently asked questions

### Is SWPPP free?

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

### Is Silt free?

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

### Do SWPPP or Silt have ads?

Neither SWPPP nor Silt shows ads.

### Which is updated more often, SWPPP or Silt?

SWPPP ships an update every 3 weeks, and Silt monthly. Most recently, SWPPP was updated on October 4, 2026 and Silt on October 3, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*