Comparison

OBD2 Scanner + Engine Sound vs Top Kids

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

Head to head
About

OBD2 Scanner + Engine Sound

Monitor your car's engine performance and hear its sound in real-time. Customize your dashboard with various widgets and track your drives with detailed maps and trip data. Offers a demo mode and optional Pro features for an enhanced experience.

Highlights
  • Real-time OBD2 data display
  • Engine sound simulation based on RPM
  • Customizable dashboard with widgets
  • Trip computer and fuel economy tracking
  • Speed and RPM on map view
  • HUD mode for windshield projection
Features
Read full description

See — and hear — your car in real time. Connect an ELM327 Bluetooth (BLE) adapter and the app turns live OBD2 data into a fast, modern dashboard: RPM, speed, coolant, throttle, fuel, and every sensor your vehicle supports, auto-detected. No subscription. Ever. WHAT MAKES IT DIFFERENT • A genuinely modern interface — not the dated look of most OBD apps • A one-of-a-kind engine-sound simulation driven by your real RPM • Speed and RPM drawn on the map, color-coded (satellite view included) • Buy once for Pro — no monthly fees, unlike many scanners BUILD YOUR OWN DASHBOARD Mix and match four widget types — digital tiles, analog needle gauges, live charts, and the trip map — then reorder them into your own instrument screen. A mirrored HUD mode projects your speed onto the windshield at night. FIVE FOCUSED TABS • Dashboard — your own widget layout, plus HUD mode • Data — every live sensor, overlaid or separate charts, CSV export (long or spreadsheet-friendly wide format) • Drive — trip computer with fuel economy, the color-coded track map, a G-force ball, and 0–100 timing • Engine Sound — procedural sound that follows your real RPM (all presets free) • Tools — adapter info and communication log FREE INCLUDES Live data, the dashboard, track map, trip computer, HUD, and engine sound — free, with a small banner ad. PRO (ONE-TIME PURCHASE, OPTIONAL) • Unlimited CSV logging • Save your 0–100 and G-force runs • Remove ads Prefer just no ads? A cheaper ad-removal-only purchase is also available. NO ACCOUNT NEEDED Your vehicle data comes straight from the ELM327 adapter over Bluetooth and is processed on your device — there is no developer server collecting it. The free version shows ads served by Google's ad SDK (buy Ad Removal or Pro and no ads are shown). Try it with no hardware using the built-in demo mode. REQUIRES an ELM327-compatible Bluetooth LE (BLE) OBD2 adapter and a vehicle with an OBD2 port (most cars sold since 2008). SUPPORT Questions or ideas? Contact: support@takasawadynamics.com

About

Top Kids

Features
Read full description

This smart app is designed for national and international schools , offering an easy and effective way for parents to follow up on their children’s academic progress and school activities. With a user-friendly interface, the app brings together parents, students, and teachers in one connected community. Through the News Feed, users receive real-time updates on school announcements, events, assignments, and important notices—ensuring everyone stays informed.

Screenshots

OBD2 Scanner + Engine Sound4 screens
Top Kids4 screens

Verdict

The call

The clearest difference is in-app purchases: Top Kids at none against OBD2 Scanner + Engine Sound's 2. Top Kids also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement 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. OBD2 Scanner + Engine Sound sells 2 one-off in-app purchases. Top Kids asks for nothing beyond the download.

UpkeepUpdate frequency

OBD2 Scanner + Engine Sound ships an update every 9 days, Top Kids every 6 days. Both last shipped on October 25, 2026.

Scorecard2 real differences · 7 level
OBD2 Scanner + Engine Sound versus Top Kids: the parameters behind the verdict, then further details
ParameterOBD2 Scanner + Engine SoundTop Kids
PriceFreeFree
Rating4.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 9 daysEvery 6 days — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone
Requires iOS17.0 — better18.4
Further details — not scored
Size6 MB44 MB
Age rating4+4+
DeveloperSena TakasawaSAGA FOR SOLUTIONS

In-app purchases

2 purchases

OBD2 Scanner + Engine Sound

One-time2
  • Remove Ads$1.99
  • car_ui Pro (One-Time)$4.99
None

Top Kids

No in-app purchases

Questions

Is OBD2 Scanner + Engine Sound free?
OBD2 Scanner + Engine Sound is free to download, with in-app purchases available.
Is Top Kids free?
Top Kids is free to download, with no in-app purchases.
Do OBD2 Scanner + Engine Sound or Top Kids have ads?
OBD2 Scanner + Engine Sound shows ads; Top Kids does not.
Which is updated more often, OBD2 Scanner + Engine Sound or Top Kids?
OBD2 Scanner + Engine Sound ships an update every 9 days, and Top Kids every 6 days. Most recently, OBD2 Scanner + Engine Sound was updated on October 25, 2026 and Top Kids on October 25, 2026.

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