OBD2 Cat vs Quant
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OBD2 Cat
This app reads diagnostic trouble codes and live vehicle data from compatible cars using a Bluetooth OBD2 adapter. It helps drivers understand dashboard warnings by checking engine codes, viewing sensor data, and retrieving vehicle identification information.
- Read diagnostic trouble codes (DTCs)
- Clear supported trouble codes
- View live engine and sensor data
- Check VIN, make, model, and year
- Auto Scan for codes
- View OBD protocol and connection status
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Your car has a story. OBD2 Cat helps you read the clues. OBD2 Cat is a straightforward Bluetooth OBD2 car scanner for compatible vehicles and adapters. Read diagnostic trouble codes, view live vehicle data, and check key vehicle details from your iPhone. With OBD2 Cat, you can: - Read Check Engine diagnostic trouble codes (DTCs) - Clear supported trouble codes - View supported live engine and sensor data - Check and copy your VIN, plus available make, model, and model year - Turn on Auto Scan to scan for codes after connecting - See the active OBD protocol and connection status Designed for drivers who want a simple first look when a dashboard warning appears, without the clutter of a professional workshop tool. Use a Bluetooth OBD2 adapter compatible with your iPhone and vehicle. If you use an ELM327-style adapter, make sure it supports Bluetooth Low Energy (BLE). Important: Clearing a trouble code does not repair the underlying issue. A warning light may return if the fault remains. For safety-critical warnings or persistent problems, have the vehicle inspected by a qualified technician.
Quant
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Quant Unit Converter is a powerful tool for accurate conversion of physical quantities. Designed with the needs of engineers, scientists, students and everyone working with physical quantities in mind. Key features: ∙ Wide range of conversion units - more than 100 measurement units in various categories; ∙ Intuitive interface - simple and clear design for fast operation; ∙ Accurate calculations - high precision conversion with scientific notation support; ∙ Offline operation - works without internet connection. Unit categories: ∙ Basic: length, area, volume, mass, time, temperature; ∙ Physics: speed, acceleration, force, pressure, density, energy; ∙ Engineering: power, heat capacity, electricity, magnetism; ∙ Chemistry: amount of substance, radioactivity, viscosity. Fast and convenient operation: ∙ Instant conversion of selected measurement units when entering values; ∙ Quick copying of results; ∙ Ability to choose value rounding precision; ∙ Convenient setup of categories and measurement units you work with; ∙ Support for light and dark interface themes; ∙ No ads, only one-time purchase to unlock all conversion categories and support developers.
Screenshots
Verdict
The clearest difference is in-app purchases: OBD2 Cat at none against Quant's 1. On price, ads, 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
Both are free to download. Quant sells 1 one-off in-app purchase. OBD2 Cat asks for nothing beyond the download.
| Parameter | OBD2 Cat | Quant |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Fortnightly | — |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 15 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Roman Tikhonychev | Anatolii Atamanov |
In-app purchases
OBD2 Cat
No in-app purchases
Quant
- Full Version$3.99
Questions
Is OBD2 Cat free?
Is Quant free?
Do OBD2 Cat or Quant have ads?
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