Following Distance Downloads & RevenueFollowing Distance – Vung Lai · Google Play
36 days old
Following Distance – Vung Lai gets 100+ downloads a day worldwide (AppInsider estimate, November 2026, rounded down to a band).
Following Distance – Vung Lai is #10 in Auto & Vehicles Free on Google Play in Vietnam and charting in 1 of 23 countries we track.
Updated 9 Nov 2026 · rankings refresh through the day
DeveloperDan Vu
CategoryAuto & Vehicles
PriceFree
Released
Installs1k+
Rating–
Updated–
Content ratingEveryone
Following Distance – Vung Lai update history & changes
Last change · 3 events since 4 Oct 2026Full timeline ↓Full timeline · 3 events
- 📈Following Distance – Vung Lai entered the top 10Top Free · Auto & Vehicles · VN
- 🆕Following Distance – Vung Lai first spotted by AppInsiderVietnam
- 🆕Following Distance – Vung Lai released on Google Play
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Best rank now
#10
Auto & Vehicles FreeMeasured
Following Distance – Vung Lai on Google Play
App details
App ID
vn.ai.dan.vunglai
Publisher
Dan Duc Vu
Publisher country
Canada
Content rating
Everyone
Following Distance – Vung Lai downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Google Play shows an exact lifetime install count; downloads per day are its daily change (measured). When Play hasn't refreshed the count, they come from new ratings and Top Free chart positions. Confidence is the chance the real number is within half to double ours.
Where Following Distance – Vung Lai's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
Retention · share of new users still active
Day 1
Day 7
Day 30
Time spent · per daily user
Average time spent Pro
min a day
Sessions a day Pro
Time per session Pro
min
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
Business model: In-app purchase-led
How Following Distance – Vung Lai makes money: subscriptions, one-off purchases and ads.
In-app purchases
One-off purchases
/mo
of revenue
Where it ranks on Google Play
Every top 200 chart it appears in across 23 countries.
| Country | Charts | Rank |
|---|---|---|
| Vietnam | Auto & VehiclesFree | #10 |
Apps near Following Distance – Vung Lai on the chart
Auto & Vehicles Free, around #10.
What users say about Following Distance – Vung Lai
From recent reviews.
About Following Distance – Vung Lai
Vững Lái (Vung Lai) is a following-distance and tailgating alert app from DanAI. Mount your phone on the windshield: the rear camera and AI running on the phone itself spot the vehicle ahead in your lane, estimate the distance, and warn you when you follow too closely for your current speed.
THE 2-SECOND AND 3-SECOND RULE, MEASURED FOR YOU
• Canada: the 2-second rule by default, in km/h and metres.
• United States: the 3-second rule by default, in mph and feet.
• Vietnam: Circular 38/2024/TT-BGTVT for dry roads (35 m at 60 km/h; 55 m up to 80 km/h; 70 m up to 100 km/h; 100 m up to 120 km/h), with a 1-second reminder from 20 km/h below those speeds.
• The region is guessed from your phone and can be changed in Settings. You can also pick any time-gap rule or set your own distance table.
• Speed comes from the phone's GPS.
ALERTS YOU DON'T HAVE TO LOOK AT
• Under the safe following distance: shown in amber, and spoken once it lasts a few seconds. Really close (under 3/4 of the safe distance, held for a full second): red, sounded at once.
• Tones, vibration and voice prompts in English or Vietnamese (follows the app language).
• Voice styles: standard, friendly, cheerful, or your own custom lines.
• Forward collision warning when the gap closes quickly.
• Lane departure warning.
• Speed-limit sign reminder (in Vietnam).
• Three sensitivity levels: Calm (warns later and less), Balanced, Sensitive (earlier and more).
DRIVER ASSISTANCE (ADAS) ON THE PHONE YOU ALREADY HAVE
• No extra hardware: a windshield phone mount is all you need.
• Mount assistant to place the phone at the right spot and angle; a level and a faint hood outline help put it back where it was.
• Automatic camera calibration while you drive.
• Floating window (picture-in-picture) to use alongside your navigation app.
• Day and night themes, plus a HUD mirror mode.
• Trip history; GPS route saving if you turn it on (off by default).
• The phone's temperature shows in a corner of the screen; when it gets hot, the app scales back its processing to keep running smoothly.
PRIVACY
• Camera images and location are processed on the phone and never uploaded.
• The app goes online only to download the signed distance table (with none of your data) and for tips through Google Play.
• No account, no sign-in, no ads, no tracking.
• Settings and trip history stay on your phone; clearing the app's data removes everything.
• Location is used only while the app is open.
FREE
Every feature is free. If you like, you can support the developer through Google Play; tips are voluntary and unlock nothing extra.
SAFETY NOTICE
Vững Lái is an assistance tool only. It is not a certified measuring device, it does not control your vehicle, and its estimates can be wrong, especially at night, in rain or fog, against the sun, or with a dirty windshield. The driver is always responsible for watching the road, keeping a safe distance and obeying traffic law. Set the app up before you drive, mount the phone where
THE 2-SECOND AND 3-SECOND RULE, MEASURED FOR YOU
• Canada: the 2-second rule by default, in km/h and metres.
• United States: the 3-second rule by default, in mph and feet.
• Vietnam: Circular 38/2024/TT-BGTVT for dry roads (35 m at 60 km/h; 55 m up to 80 km/h; 70 m up to 100 km/h; 100 m up to 120 km/h), with a 1-second reminder from 20 km/h below those speeds.
• The region is guessed from your phone and can be changed in Settings. You can also pick any time-gap rule or set your own distance table.
• Speed comes from the phone's GPS.
ALERTS YOU DON'T HAVE TO LOOK AT
• Under the safe following distance: shown in amber, and spoken once it lasts a few seconds. Really close (under 3/4 of the safe distance, held for a full second): red, sounded at once.
• Tones, vibration and voice prompts in English or Vietnamese (follows the app language).
• Voice styles: standard, friendly, cheerful, or your own custom lines.
• Forward collision warning when the gap closes quickly.
• Lane departure warning.
• Speed-limit sign reminder (in Vietnam).
• Three sensitivity levels: Calm (warns later and less), Balanced, Sensitive (earlier and more).
DRIVER ASSISTANCE (ADAS) ON THE PHONE YOU ALREADY HAVE
• No extra hardware: a windshield phone mount is all you need.
• Mount assistant to place the phone at the right spot and angle; a level and a faint hood outline help put it back where it was.
• Automatic camera calibration while you drive.
• Floating window (picture-in-picture) to use alongside your navigation app.
• Day and night themes, plus a HUD mirror mode.
• Trip history; GPS route saving if you turn it on (off by default).
• The phone's temperature shows in a corner of the screen; when it gets hot, the app scales back its processing to keep running smoothly.
PRIVACY
• Camera images and location are processed on the phone and never uploaded.
• The app goes online only to download the signed distance table (with none of your data) and for tips through Google Play.
• No account, no sign-in, no ads, no tracking.
• Settings and trip history stay on your phone; clearing the app's data removes everything.
• Location is used only while the app is open.
FREE
Every feature is free. If you like, you can support the developer through Google Play; tips are voluntary and unlock nothing extra.
SAFETY NOTICE
Vững Lái is an assistance tool only. It is not a certified measuring device, it does not control your vehicle, and its estimates can be wrong, especially at night, in rain or fog, against the sun, or with a dirty windshield. The driver is always responsible for watching the road, keeping a safe distance and obeying traffic law. Set the app up before you drive, mount the phone where