Comparison

Queue Alert vs Slow Them Down

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Live wait time estimates
  • Predict queue progress
  • Calculate people served by time
  • Customize queuing system calculations
  • Versatile for any queuing system
Features
Read full description

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.

About

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.

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
Read full description

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

Queue Alert4 screens
Slow Them Down4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 6 level
Queue Alert versus Slow Them Down: the parameters behind the verdict, then further details
ParameterQueue AlertSlow Them Down
PriceFreeFree
Rating5.0 (3 ratings) — better3.0 (2 ratings)
Positive reviews100.0% of reviews
Number of ratings3 — better2
Update frequencyEvery 2 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS11.0 — better17.0
Further details — not scored
Size22 MB4 MB
Age rating4+12+
DeveloperJohn CarlsonDuncan Grazier

Customer experience

Queue Alert

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Slow Them Down

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Queue Alert

No in-app purchases

None

Slow Them Down

No in-app purchases

Questions

Is Queue Alert free?
Queue Alert is free to download, with no in-app purchases.
Is Slow Them Down free?
Slow Them Down is free to download, with no in-app purchases.
Which has better reviews, Queue Alert or Slow Them Down?
Queue Alert is rated higher. Queue Alert averages 5.0 out of 5 from 3 ratings, while Slow Them Down averages 3.0 from 2 ratings.
Do Queue Alert or Slow Them Down have ads?
Neither Queue Alert nor Slow Them Down shows ads.
Which is updated more often, Queue Alert or Slow Them Down?
Queue Alert ships an update every 2 weeks, and Slow Them Down every 2 months. Most recently, Queue Alert was updated on September 15, 2026 and Slow Them Down on August 31, 2026.

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