Queue Alert vs Slow Them Down
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Queue Alert
Estimate wait times and predict queue progress. This app helps you manage your time by calculating how long you'll wait or how many people will be served by a certain time. It's a versatile tool for any queuing system.
- Live wait time estimates
- Predict queue progress
- Calculate people served by time
- Customize queuing system calculations
- Versatile for any queuing system
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While in a queue (or line) have you asked yourself any of the following questions: Will I make it through security in time? Will I get my movie tickets before the show starts? How long until I can place my order? What is that smell? If so, this app may be for you. We find ourselves in queues (or lines) far more often than we'd like and, as a rule, they move more slowly than we'd hope. In fact, the phrase "this line is moving so fast" isn't found in any major language or travel guide. Have you found yourself, like me, counting the number of people in front of you? Trying to judge the speed of the person behind the desk? Trying to juggle these figures in your head while being bumped and prodded to keep your place? Queue Alert can help, doing the math for you and giving you live estimates that you can use. Once a rate is established, you can predict your wait time or predict how many people or items will get through the queue by a given time. Or, you can enter the amount of time you have to wait to see how far the queue will progress. All of this is easily at your fingertips. Isn't it time you got more out of line? Other uses: Queue Alert isn't just for waiting in lines! This app could be used to help predict the movement of anything through a queuing system of any sort. Really, it's just math. Tap the "number in queue" flipper to cycle through a number of possible options and fully customize your experience. Limitations: Obviously, the estimations made by the app (and subsequent alerts) may not reflect what you actually observe, for a variety of reasons. Queues may speed up or slow down as new registers open or close, for example. These are just estimates and hold no special sway over future events. Queue carefully.
Slow Them Down
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.
- 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
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Slow Them Down turns your iPhone into a traffic speed study tool. Record vehicles on your street, mark their positions frame by frame, and get accurate speed estimates — no radar gun required. How it works 1. Calibrate your camera using a known reference distance (vehicle length, lane width, or a manual measurement) 2. Record a video of passing traffic 3. Select two frames and mark the vehicle's position in each 4. Get an instant speed estimate in MPH Track every vehicle Log each measurement with vehicle type, travel direction, street name, and timestamp. Build a complete picture of traffic patterns in your neighborhood over days, weeks, or months. Automated reports Generate detailed PDF reports with V85 speeds, traffic volume breakdowns, speed distribution charts, and vehicle type summaries. Filter by street to isolate problem areas. Share reports directly with your city council, HOA, or neighborhood group. Privacy built in Faces and license plates are automatically detected and blurred before you share anything. The app errs on the side of caution because a blurred street sign is better than a visible plate. We also don't store the images, videos beyond the processing needed to calculate a speed. Built for advocacy Speed data is what cities use to justify traffic calming measures like speed bumps, stop signs, and road diets. Slow Them Down gives your community the same data, collected from the streets you actually live on.
Screenshots
Verdict
The clearest difference is rating: Queue Alert at 5.0 against Slow Them Down's 3.0. Queue Alert also leads on update cadence (every 2 weeks vs every 2 months) and device support (3 vs 1). On price, ratings volume, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Queue Alert holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 3 and 2 respectively.
Queue Alert ships an update every 2 weeks, Slow Them Down every 2 months. The most recent releases landed on September 15, 2026 and August 31, 2026 respectively.
| Parameter | Queue Alert | Slow Them Down |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) — better | 3.0 (2 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 3 — better | 2 |
| Update frequency | Every 2 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 11.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 22 MB | 4 MB |
| Age rating | 4+ | 12+ |
| Developer | John Carlson | Duncan Grazier |
Customer experience
Queue Alert
Slow Them Down
In-app purchases
Queue Alert
No in-app purchases
Slow Them Down
No in-app purchases
Questions
Is Queue Alert free?
Is Slow Them Down free?
Which has better reviews, Queue Alert or Slow Them Down?
Do Queue Alert or Slow Them Down have ads?
Which is updated more often, Queue Alert or Slow Them Down?
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