Comparison

Badass Proof Calc vs OpenOBD

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

Head to head
About

Badass Proof Calc

Features
Read full description

Badass Proof Calc is a no-nonsense proof and dilution calculator built for craft distillers, whiskey makers, and serious home distillers. Plug in your starting proof, target proof, and volume — get the exact amount of water to add. Math is powered by the official OIML alcoholometric tables, so your numbers match what the TTB and the rest of the industry use. FEATURES • OIML-accurate dilution calculator • Density-to-proof conversion using official OIML tables • Final volume + weight output for both 100-proof and 90-proof references • Batch history with Julian date numbering for clean record-keeping • All data stored locally — no account, no cloud, no nonsense • Works fully offline in the still-house • Dark, on-brand UI built to live next to a hydrometer, not a laptop Built by distillers, for distillers. Cut your proof right the first time.

About

OpenOBD

Transform your iPhone into a real-time car dashboard. Connect an OBD2 adapter to monitor live engine data, track your trips with GPS, and diagnose fault codes with clear explanations. Explore all features in demo mode without hardware.

Highlights
  • Live engine data monitoring
  • Real-time speed, RPM, temperature gauges
  • Trip logging with GPS mapping
  • Read and clear diagnostic trouble codes (DTCs)
  • Vehicle information display
  • Demo mode for exploration
Features
Read full description

OpenOBD turns your iPhone into a real-time car dashboard. Connect any ELM327 OBD2 adapter (Bluetooth or Wi-Fi) and see what your car is really doing — live. LIVE ENGINE DATA • Speed, RPM, coolant temperature, intake, throttle, engine load, battery voltage and more • 50+ sensors with gauges you pick and reorder yourself • Instant and average fuel consumption • Tap any gauge for a live 60-second chart CARPLAY • A live 8-tile dashboard on your car's built-in screen • Start and stop trip recording without touching your phone DIAGNOSTICS • Read and clear fault codes (DTCs) with plain-language explanations • For common codes: what it means, how urgent it is, what to do next • Emissions readiness monitors before an inspection • Freeze frame — the sensor values from the moment the fault occurred • Vehicle info: VIN, fuel type, supported sensors TRIP LOGGING • Automatically record your drives with the GPS route on a map • Keeps recording in the background, even with the screen locked • Distance, duration, speed and fuel for every trip • Export any trip as CSV or GPX CAR HEALTH TOOLS • Battery and charging test: state of charge, alternator and cranking check • Diesel and DPF pre-check from standard, read-only OBD evidence • Used car check before you buy • Measure 0-100 km/h acceleration and 100-0 km/h braking • Live alerts for overheating and low voltage, in plain language BUILT FOR DRIVERS • Beautiful dark interface designed for the car • Over 40 languages, metric and imperial units • Works with affordable ELM327 adapters — no subscription, no account, no ads • Your data stays on your phone TRY IT WITHOUT HARDWARE • Tap Connect, then Demo Mode, to explore every feature with simulated live data OpenOBD is not affiliated with any car manufacturer. An OBD2 adapter (sold separately) is required to read data from your vehicle. Most petrol cars built after 2001 and diesels after 2004 are supported. The battery, diesel and used-car results are read-only pre-checks and do not replace a professional inspection.

Screenshots

Badass Proof Calc4 screens
OpenOBD4 screens

Verdict

The call

Badass Proof Calc and OpenOBD 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ScorecardNo meaningful differences
Badass Proof Calc versus OpenOBD: the parameters behind the verdict, then further details
ParameterBadass Proof CalcOpenOBD
PriceFreeFree
Rating—4.8 (4 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—4 — better
Update frequency—Every 5 days
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.1 — better16.4
Further details — not scored
Size37 MB54 MB
Age rating12+4+
DeveloperRONALD JAMES STONEOsman Cengeri

In-app purchases

None

Badass Proof Calc

No in-app purchases

None

OpenOBD

No in-app purchases

Questions

Is Badass Proof Calc free?
Badass Proof Calc is free to download, with no in-app purchases.
Is OpenOBD free?
OpenOBD is free to download, with no in-app purchases.
Do Badass Proof Calc or OpenOBD have ads?
Neither Badass Proof Calc nor OpenOBD shows ads.

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