Badass Proof Calc vs OpenOBD
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Badass Proof Calc
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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.
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.
- 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
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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 • Clean, fast gauges that update in real time • Instant and average fuel consumption TRIP LOGGING • Automatically record your drives with the GPS route on a map • Keeps recording in the background, even with the screen locked • Review distance, duration, speed and fuel for every trip DIAGNOSTICS • Read and clear fault codes (DTCs) with plain-language explanations • Check-engine (MIL) status and stored trouble codes • Vehicle info: VIN, fuel type, supported sensors BUILT FOR DRIVERS • Beautiful dark interface designed for the car • Works with affordable ELM327 adapters — no subscription, no account 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.
Screenshots
Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Badass Proof Calc | OpenOBD |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | — | Every 2 days |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.1 — better | 16.4 |
| Further details — not scored | ||
| Size | 37 MB | 36 MB |
| Age rating | 12+ | 4+ |
| Developer | RONALD JAMES STONE | Osman Cengeri |
In-app purchases
Badass Proof Calc
No in-app purchases
OpenOBD
No in-app purchases
Questions
Is Badass Proof Calc free?
Is OpenOBD free?
Do Badass Proof Calc or OpenOBD have ads?
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