Comparison

AlphaTech Plotter vs OBD2 Car Scanner ELM327

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

Head to head
About

AlphaTech Plotter

Features
Read full description

AlphaTech Plotter is an innovative offline tool that helps you plan, visualize, and print precise screen layout templates for a wide range of phone models. Designed for both professional and personal use, it delivers accurate measurements for cutters and other devices — all processed locally on your device with no data collection.

About

OBD2 Car Scanner ELM327

This app connects to your car's OBD2 adapter to read and explain diagnostic trouble codes in plain language. It provides AI-powered insights into potential issues, repair costs, and live sensor data, helping you understand your vehicle's health.

Highlights
  • Reads and explains OBD2 fault codes in plain language
  • AI-powered verdict on car issues
  • Live sensor data with AI pattern flagging
  • Code clearing and re-checking functionality
  • History of scans for multiple cars
  • VIN reading via camera or adapter
Features
Read full description

Your check engine light just came on. What does it mean, and how urgent is it? Plug in a compatible OBD2 adapter and Cavox reads your car's fault codes and gives you a verdict in plain language, right in your car. Most code readers show "P0301" and leave you searching the internet. Cavox turns the reading into words you understand, and with Premium an AI explanation of every code: what it may mean, what to check first, when to stop driving and what a repair may cost. WHAT YOU GET • A plain-language verdict such as "Worth a look" or "There's a problem", and how many points need your attention. • AI explanations of each fault code: likely causes, what to check first and when to stop. (Premium) • Clear fault codes after a repair and re-check them. Clearing a code does not fix the fault: it may come back, and some cars refuse the clear. (Premium) • Live data such as RPM, coolant temperature, battery voltage and engine load. With Premium, AI can flag unusual sensor patterns even when there are no codes. • A history of scans for each car, so you can see what changed. (Premium) • A garage for several cars, each with its own history. • Your VIN read from the adapter or scanned from your car documents with the camera. • Demo mode with a sample car, before you even have an adapter. WHAT YOU NEED An ELM327-type OBD2 adapter with Bluetooth LE or Wi-Fi, bought separately. Bluetooth Classic adapters do not work with iPhone. What you can read depends on your car and your adapter. Cavox runs on iPhone with iOS 18 or later. FREE AND PREMIUM Free: connecting your adapter, the full check, the verdict, how many points need attention, the first two live readings, one car in the garage and demo mode. The number of free AI verdicts is limited. Premium: exact codes with AI explanations, clearing and re-checking codes, all live readings with the AI sensor check, scan history and more than one car. Eligible new subscribers may get a 3-day free trial on the weekly plan. Plans, prices and terms are shown in the app before you buy; subscriptions renew automatically until you cancel them in your iPhone settings. APP LANGUAGE The app is available in English, Russian, Portuguese (Brazil), German, Spanish, French, Arabic and Ukrainian, and fault-code explanations come in your app language. Use Cavox with the vehicle stopped, never while driving. Cavox is a diagnostic aid, not a substitute for a mechanic, and it does not guarantee that your vehicle is safe. Privacy Policy: https://larikoz.github.io/diagnostic-ai-legal/privacy-policy Terms of Use: https://larikoz.github.io/diagnostic-ai-legal/terms-of-use

Screenshots

AlphaTech Plotter4 screens
OBD2 Car Scanner ELM3274 screens

Verdict

The call

The clearest difference is in-app purchases: AlphaTech Plotter at none against OBD2 Car Scanner ELM327's 4. AlphaTech Plotter also leads on device support (3 vs 1) and iOS requirement (13.0 vs 18.0). OBD2 Car Scanner ELM327's advantage is update cadence (every 6 days vs every 6 weeks). On price and ads 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 Car Scanner ELM327 sells 4 in-app purchases, starting at $9.99 per 7 days. AlphaTech Plotter asks for nothing beyond the download.

UpkeepUpdate frequency

AlphaTech Plotter ships an update every 6 weeks, OBD2 Car Scanner ELM327 every 6 days. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.

Scorecard4 real differences · 6 level
AlphaTech Plotter versus OBD2 Car Scanner ELM327: the parameters behind the verdict, then further details
ParameterAlphaTech PlotterOBD2 Car Scanner ELM327
PriceFreeFree
Rating—4.7 (7 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—7 — better
Update frequencyEvery 6 weeksEvery 6 days — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Freemium
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better18.0
Further details — not scored
Size24 MB44 MB
Age rating17+4+
DeveloperElchin IsayevLarisa Kozlova

In-app purchases

None

AlphaTech Plotter

No in-app purchases

4 purchases

OBD2 Car Scanner ELM327

Subscriptions3
  • Weekly Premium3 Days trial$9.997 Days
  • Cavox Premium Monthly$14.991 Month
  • Cavox Premium Yearly$49.991 Year
One-time1
  • Cavox Premium Lifetime$49.99

Questions

Is AlphaTech Plotter free?
AlphaTech Plotter is free to download, with no in-app purchases.
Is OBD2 Car Scanner ELM327 free?
OBD2 Car Scanner ELM327 is free to download, with in-app purchases available.
Do AlphaTech Plotter or OBD2 Car Scanner ELM327 have ads?
Neither AlphaTech Plotter nor OBD2 Car Scanner ELM327 shows ads.
Which is updated more often, AlphaTech Plotter or OBD2 Car Scanner ELM327?
AlphaTech Plotter ships an update every 6 weeks, and OBD2 Car Scanner ELM327 every 6 days. Most recently, AlphaTech Plotter was updated on October 30, 2026 and OBD2 Car Scanner ELM327 on November 5, 2026.

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