Comparison

MERLIN vs Universal Speedometer

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

Head to head
About

MERLIN

Features
Read full description

MERLIN is the surveillance hub on mobile devices with cloud-optimized features. With the compatibility with multiple devices, you can control the camera, retrieve videos, view device status, and get alerts without using a computer. Users can store, manage, record, and play video remotely with various security and practical features. It's easy to operate without a complicated setup, and all contents are transmitted with industrial-grade transmission. ## Features: 1. Connect to NVR and IPCAM by P2P 2. Live view with fluent streaming (depends on network condition) 3. Playback recordings on NVR 4. Push notification to catch any event 5. Landscape viewing to maximize the image 6. Event list and filter for management

About

Universal Speedometer

Track your speed and direction with this versatile tool. It offers analog and digital speedometer views, a compass, and trip statistics. Set speed limits, measure acceleration, and use HUD mode for windshield projection. Supports MPH, KMH, and Knots.

Highlights
  • Analog and digital speedometer
  • Compass for direction
  • Speed limit alerts
  • Acceleration measurement
  • HUD mode for windshield
  • Multiple unit support (MPH, KMH, Knots)
Features
Read full description

Universal Speedometer shows how fast you move. You can use it in a car, on a motorcycle, bicycle, scooter, boat, or even on a train. - It has a speedometer that works in both analog and digital style. There’s also a compass so you always know your direction. - You can see your current speed, your average speed, and the maximum speed during your trip. If you want, you can set a speed limit. The app will let you know when you go over it. - There’s a simple tool to measure acceleration, how fast your vehicle picks up speed. And for drivers, the HUD mode projects the speed right onto the windshield, so you don’t have to look down at your phone. - You can also choose the units you like: MPH, KMH, or Knots. It’s useful for short rides in the city, long road trips, cycling sessions, or sailing. Just open the app, set your view, and keep track of your speed.

Screenshots

MERLIN4 screens
Universal Speedometer4 screens

Verdict

The call

The clearest difference is update cadence: MERLIN at every 4 weeks against Universal Speedometer's every 5 months. MERLIN also leads on device support (3 vs 1) and iOS requirement (15.1 vs 17.0). On price, 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.

UpkeepUpdate frequency

MERLIN ships an update every 4 weeks, Universal Speedometer every 5 months. The most recent releases landed on January 30, 2026 and September 3, 2026 respectively.

Scorecard3 real differences · 6 level
MERLIN versus Universal Speedometer: the parameters behind the verdict, then further details
ParameterMERLINUniversal Speedometer
PriceFreeFree
Rating—4.0 (4 ratings) — better
Number of ratings—4 — better
Update frequencyEvery 4 weeks — betterEvery 5 months
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.1 — better17.0
Further details — not scored
Size48 MB4 MB
Age rating4+4+
DeveloperMerlin Cloud Security Corp.Evgheni Mihailevschi

In-app purchases

None

MERLIN

No in-app purchases

None

Universal Speedometer

No in-app purchases

Questions

Is MERLIN free?
MERLIN is free to download, with no in-app purchases.
Is Universal Speedometer free?
Universal Speedometer is free to download, with no in-app purchases.
Do MERLIN or Universal Speedometer have ads?
Neither MERLIN nor Universal Speedometer shows ads.
Which is updated more often, MERLIN or Universal Speedometer?
MERLIN ships an update every 4 weeks, and Universal Speedometer every 5 months. Most recently, MERLIN was updated on January 30, 2026 and Universal Speedometer on September 3, 2026.

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