Steer vs MasterBuilder Pro
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Steer
Transform your smartphone into a powerful OBD2 diagnostic tool. Read and clear fault codes, monitor real-time performance metrics, and test your vehicle's acceleration and emissions. Compatible with a wide range of car brands and OBD2 scanners.
- Universal OBD2 scanner compatibility
- Read and erase fault codes
- Real-time performance metrics
- Acceleration and performance testing
- Emission compliance checks
- Supports various car brands
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Your car has been trying to tell you something. Steer translates it. Plug the Steer sensor into the port under your steering wheel and the app reads what your car already knows β then explains it the way an honest mechanic would: in plain language, with no jargon and nothing to upsell you. WHAT YOU GET: β AI MECHANIC Ask anything about your car and get a straight answer. Send a photo of a warning light, a leak on the driveway or a part you don't recognize, or just describe the noise it makes. It knows your exact car and your latest scan. β ONE NUMBER, 0 TO 100 Your Steer Score answers "how is my car right now?". No trouble codes to look up, no tables to read. Watch it move over time. β PROBLEMS IN PLAIN LANGUAGE Every issue comes with what it means, whether it is safe to keep driving, and what the repair usually costs. Not "P0420 β Catalyst System Efficiency Below Threshold". β DEEP SCAN 21 systems and 126 live parameters, across every module your car will talk to. Start it, lock your phone, and get a notification when it is done. β DASHBOARD LIGHT LIBRARY Every warning light on your dashboard β check engine, ABS, airbag, TPMS, oil, battery β what it actually means, and how urgent it really is. β MAINTENANCE THAT KNOWS YOUR CAR Service intervals based on your VIN and your real mileage, not a generic checklist. Oil changes, filters, brakes, belts. β SAFETY RECALLS We check your VIN against the manufacturer recall database and tell you if your car is affected. β EVERY OBD2 CAR SINCE 1996 80 makes and thousands of models, 1996 to 2026. TRY IT BEFORE YOU BUY Open the app and tap "Try a real scan". You get the whole experience on a demo car β scan, results, AI Mechanic β with no sensor, no account and no card. WHAT YOU NEED Steer works with the Steer OBD2 sensor, available at steer.so. It is not compatible with third-party adapters. MEMBERSHIP Free forever: live codes, battery alerts and basic diagnosis. Steer Plus unlocks the unlimited AI Mechanic, full explanations for every issue, predictive maintenance and every car in the household β $99/year with a 14-day free trial, or $14.99/month. Terms of Use: https://steer.so/terms Privacy Policy: https://steer.so/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
MasterBuilder Pro
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The all-in-one construction calculator built for Australian tradies. MasterBuilder Pro gives you 55 professional calculators across 8 trades β Carpentry, Electrical, Plumbing, Concreting, Roofing, Bricklaying, Plastering, and Landscaping. Every calculator follows Australian Standards (AS/NZS) and the National Construction Code (NCC 2025). CALCULATE FAST ON SITE - Deck, stair, timber span, roof truss, pergola and more - Cable sizing, voltage drop, max demand, solar estimator - Pipe sizing, drainage fall, hot water, gas pipe, rainwater tank - Concrete slab, footings, steps, stumps, mix ratios - Roof area, tiles, metal sheets, battens, gutters, insulation - Brick walls, block walls, mortar, lintels, retaining walls - Plasterboard, render, cornice, skim coat, wall insulation - Paving, fencing, turf, soil, retaining walls, irrigation GENERATE PROFESSIONAL QUOTES - PDF quotes with your business name, ABN, licence, and insurance - Quote or Estimate toggle with legally correct wording - State-specific deposit caps (NSW, VIC, QLD, SA, WA, TAS) - Client signature line, terms and conditions, cooling-off notice - Combine multiple calculations into one project quote COMPARE PRICES INSTANTLY - Search major Australian hardware stores - See the cheapest price across multiple retailers - Barcode scanner for quick product lookup AI-POWERED VISUALISATION - Take a photo of any room or job site - Describe changes β new flooring, lighting, paint colours - See a photorealistic preview before you start work BUILT FOR AUSTRALIAN TRADIES - 348 default material prices from Australian suppliers - NCC 2025 and AS/NZS compliance checks on every calculation - Voice calculator with unit conversions - Save projects, track favourites, view calculation history - Works offline β all calculators run on your device Free to try with 3 calculators. Upgrade to Pro to unlock all 55 calculators, pricing, quotes, Compare, and Imagine. Terms of Use: https://masterbuilderprodev.github.io/masterbuilder-pro/terms.html Privacy Policy: https://masterbuilderprodev.github.io/masterbuilder-pro/privacy.html
Screenshots
Verdict
The clearest difference is update cadence: MasterBuilder Pro at every 2 months against Steer's every 6 months. MasterBuilder Pro also leads on iOS requirement (15.1 vs 26.1). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Steer sells 2 in-app purchases, starting at $9.99 per month and MasterBuilder Pro sells 3 in-app purchases, starting at $9.00 per month. Whichever you choose, the download price is not the number that matters.
Steer ships an update every 6 months, MasterBuilder Pro every 2 months. The most recent releases landed on September 2, 2026 and September 12, 2026 respectively.
| Parameter | Steer | MasterBuilder Pro |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 40.0% of reviews | β |
| Update frequency | Every 6 months | Every 2 months β better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | β |
| Devices | iPhone, iPad | iPhone, iPad, iPod β better |
| Requires iOS | 26.1 | 15.1 β better |
| Further details β not scored | ||
| Size | 25 MB | 34 MB |
| Age rating | 4+ | 4+ |
| Developer | Smarters Engineered | Harrison Habib |
In-app purchases
Steer
- OBD2 Pro$9.991 Month
- OBD2 Pro$19.991 Year
MasterBuilder Pro
- MasterBuilder Pro Monthly$9.001 Month
- Annual3 Days trial$89.991 Year
- Lifetime$199.99
Questions
Is Steer free?
Is MasterBuilder Pro free?
Do Steer or MasterBuilder Pro have ads?
Which is updated more often, Steer or MasterBuilder Pro?
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