OBD2 Cat vs Grip OBD
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.
Grip OBD
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Grip turns your iPhone into a real in-car instrument cluster and diagnostic tool. Pair a standard ELM327 OBD-II Bluetooth adapter and watch your engine come alive with a premium, tach-grade dashboard. LIVE DASHBOARD • Fast, beautiful radial gauges — RPM, speed, throttle, engine load, coolant, battery voltage and more • 17 live parameters, fully customizable — choose which gauges and tiles you see • Metric or imperial, your call PERFORMANCE TIMER • Time a full-throttle pull straight off your car's speed signal • 0–60 mph, 0–100 km/h, eighth and quarter mile with trap speed, and top speed • Live splits, a speed-vs-time graph, and saved runs with personal-best tracking TRIP LOGGING • Record every channel while you drive • Review RPM and speed graphs, session peaks, distance • Export any trip to CSV to dig in on your computer TROUBLE CODES • Read the diagnostic trouble codes behind your check-engine light (Mode 03) • Plain-language descriptions for common codes • Read-only and safe — Grip never clears or writes anything to your car OBD CONSOLE • Send raw ELM327/OBD-II commands and see the responses • Great for tinkering and learning the protocol TRY IT WITH NO HARDWARE • Demo mode emulates a live ECU, so the entire app works before your adapter arrives Everything runs on your device. Grip collects no data and transmits nothing to the internet. Compatible with common ELM327 Bluetooth adapters (OBD, ELM, Vgate, Viecar, VLink and similar).
Screenshots
Verdict
OBD2 Cat and Grip OBD are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | OBD2 Cat | Grip OBD |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Fortnightly | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 15 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Roman Tikhonychev | NEKTARIOS SIGALAS |
In-app purchases
OBD2 Cat
No in-app purchases
Grip OBD
No in-app purchases









