# Slow Them Down vs Vehicle Speed Radar Sensor

The clearest difference is update cadence: Vehicle Speed Radar Sensor at every 9 days against Slow Them Down's every 2 months. Vehicle Speed Radar Sensor also leads on 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.

Slow Them Down ships an update every 2 months, Vehicle Speed Radar Sensor every 9 days. The most recent releases landed on October 31, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Slow Them Down | Vehicle Speed Radar Sensor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/slow-them-down/id6760197118/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 9 days** |
| Monetization | Free | — |
| Size | 4 MB | 163 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Duncan Grazier](https://appshunter.io/developer/1883130848) | [正亮 黄](https://appshunter.io/developer/6780918447) |

## What reviewers say

### Slow Them Down

[App page](https://appshunter.io/ios/app/slow-them-down/id6760197118)

This tool transforms your iPhone into a traffic speed study device. Record passing vehicles, mark their positions frame by frame, and obtain precise speed estimates. Generate detailed reports for community advocacy and traffic calming initiatives.

**Highlights:** Record passing traffic videos, Frame-by-frame vehicle position marking, Accurate speed estimation (MPH), Log vehicle type, direction, and timestamp, Generate PDF traffic reports, Automatic face and license plate blurring, Data for traffic calming advocacy

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

**In-app purchases:** none


### Vehicle Speed Radar Sensor

[App page](https://appshunter.io/ios/app/vehicle-speed-radar-sensor/id6787924131)

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

**In-app purchases:** none


## Frequently asked questions

### Is Slow Them Down free?

Slow Them Down is free to download, with no in-app purchases.

### Is Vehicle Speed Radar Sensor free?

Vehicle Speed Radar Sensor is free to download, with no in-app purchases.

### Do Slow Them Down or Vehicle Speed Radar Sensor have ads?

Neither Slow Them Down nor Vehicle Speed Radar Sensor shows ads.

### Which is updated more often, Slow Them Down or Vehicle Speed Radar Sensor?

Slow Them Down ships an update every 2 months, and Vehicle Speed Radar Sensor every 9 days. Most recently, Slow Them Down was updated on October 31, 2026 and Vehicle Speed Radar Sensor on October 25, 2026.

---

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