# Classic Mini Toolbox - CMDIY — A Classic Mini's Best Friend > Technical toolkit and reference for Classic Mini car enthusiasts and mechanics. (iPhone/iPad app by Cole Gentry.) - Source: https://appshunter.io/ios/app/classic-mini-toolbox-cmdiy/id6751475172 (this page in markdown: same URL + `.md`) - Developer: [Cole Gentry](https://appshunter.io/developer/1835306240) - Category: Education, Reference - Price: Free with in-app purchases - Rating: 5.00/5 from 2 App Store ratings - Age rating: 4+ - Requires: iOS 17.0 · 28 MB - Languages: American English - Released: 2025-10-02 - Data updated: 2026-08-05 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/classic-mini-toolbox-cmdiy/id6751475172/reviews.md ## What is Classic Mini Toolbox? Transform Your Classic Mini Experience with Professional-Grade Technical Tools. The Classic Mini DIY Toolbox is the ultimate companion app for Classic Mini enthusiasts, mechanics, and restorers. Whether you're building a race car, restoring a barn find, or fine-tuning your daily driver, this comprehensive toolkit puts professional-grade calculations and technical reference data right in your pocket. POWERFUL CALCULATION TOOLS Compression Ratio Calculator Optimize your engine's performance with precision compression ratio calculations. Input your bore, stroke, head gasket thickness, deck height, and piston specifications to get accurate compression ratios. Perfect for selecting the right pistons, head gaskets, and planning engine builds. Supports different piston dome/dish configurations and helps you achieve your target compression for street driving or racing applications. Advanced Gearbox Calculator Master your drivetrain setup with comprehensive gear ratio analysis. Calculate final drive ratios, determine speed vs RPM relationships, and understand how tire size changes affect your gearing. Essential for autocross, track days, or highway cruising optimization. Compare different transmission and differential combinations to find the perfect setup for your driving style. SU Carburetor Needle Configurator Navigate the complex world of SU carburetor tuning with confidence. Our extensive needle database includes detailed specifications for hundreds of needle profiles. Get tuning recommendations based on your engine modifications, altitude, and performance goals. Visual needle profile charts help you understand how different needles affect fuel delivery across the RPM range. COMPREHENSIVE REFERENCE DATABASE Torque Specifications Never guess at bolt torques again. Our complete database covers engine internals, suspension components, drivetrain assemblies, and body hardware. Organized by system and component, with both metric and imperial values. Includes special procedures and notes for critical fasteners. Common Clearances & Tolerances Professional-grade clearance specifications for engine rebuilds. Covers bearing clearances, ring gaps, valve guides, timing chain stretch limits, and wear tolerances. Essential for determining what's serviceable and what needs replacement during rebuilds. WHY CLASSIC MINI ENTHUSIASTS CHOOSE OUR APP - Offline Functionality - All calculations and reference data work without an internet connection - Professional Accuracy - Data verified against factory service manuals and technical bulletins - Regular Updates - Continuously expanded database with new parts and applications - User-Friendly Interface - Clean, intuitive design optimized for garage and workshop use - Comprehensive Coverage - From 1959 Austin Seven to 2000 Rover Mini and beyond - Expert Curation - Content developed by experienced Classic Mini mechanics and racers PERFECT FOR: - Home mechanics working on their own cars - Professional shops specializing in classic BMC vehicles - Racing teams optimizing performance - Restoration specialists maintaining authenticity - Parts suppliers verifying compatibility - Classic Mini clubs and technical forums Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ ## Key features - Compression Ratio Calculator - Advanced Gearbox Calculator - SU Carburetor Needle Configurator - Torque Specifications Database - Common Clearances & Tolerances - Offline Functionality ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Sustaining Member | $1.99 | per month | ## Frequently asked questions about Classic Mini Toolbox ### What is the short name for Classic Mini Toolbox - CMDIY? The short name for Classic Mini Toolbox - CMDIY is CMDIY. ### Does CMDIY have ads? No, CMDIY does not contain advertisements. It is a completely ad-free experience for users. ### What is the pricing for CMDIY? CMDIY is available for free. There is an optional 'Sustaining Member' subscription for $1.99 per month for users who wish to support the app's development. ### What devices is CMDIY compatible with? CMDIY is compatible with both iPhone and iPad devices, offering a versatile experience across Apple's mobile platforms. ### How often is CMDIY updated? CMDIY was last updated on May 29, 2026, with version 2.9.0. The developers state the database is continuously expanded with new parts and applications. ### Can I use CMDIY without an internet connection? Yes, CMDIY offers offline functionality. All calculations and reference data are available without an internet connection, making it ideal for use in garages or workshops. ### What kind of technical data does CMDIY provide? CMDIY provides professional-grade calculations for engine compression ratios, gearbox ratios, and SU carburetor tuning. It also includes comprehensive databases for torque specifications and common clearances and tolerances. ### What is the age rating for CMDIY? CMDIY has an age rating of 4+, making it suitable for a wide range of users interested in automotive technical information. ## Version history (last 5 releases) ### 2.13.0 — 2026-07-29 • Control Center. The maintenance control now shows up in Control Center — it was registered in the wrong place and never appeared. • Sustaining Members. If you subscribed on Android or on classicminidiy.com, your membership is now recognized here. • Discord. The community invite no longer reappears every time you open the app. ### 2.11.0 — 2026-07-22 Fixes for Sustaining Members: • If you support us through Patreon, the website, or a complimentary membership, the app now correctly recognizes you everywhere — maintenance tracking, your garage, and service history unlock on sign-in instead of showing a subscribe prompt. • Restore Purchases now also checks your membership on our servers, not just the App Store. • Members are no longer shown the Discord invite on every launch — just once when your membership starts. • Fixed sign-in and sync errors affecting some longtime users after our backend migration. Also in this release: • Updated and refined for iOS 27. • The Maintenance control now appears correctly in Control Center. Thanks for supporting Classic Mini DIY! ### 2.10.0 — 2026-06-12 Sustaining Membership, properly unified. • Your membership now follows you everywhere — if you're already a Sustaining Member through any Classic Mini DIY service, the app recognizes it automatically. No double subscriptions, ever. • Maintenance tracking now unlocks for every active member, however you joined. • Members-only Discord: claim your personal invite right from the app — no more shared links. • Smarter subscription management that knows where you subscribed and takes you to the right place to manage it. • One consistent list of member benefits across every screen. Fixes: the Discord invite no longer reappears on every launch, and member status updates more reliably after purchase, restore, or sign-in. Now go check your tappet clearances. ### 2.9.0 — 2026-05-29 A fresh new look. The Toolbox has been redesigned end to end to match the Classic Mini DIY brand — new typography, refreshed olive-and-orange colors, and cleaner page layouts across every screen, in both light and dark mode. Also in this release: • Home Screen and Control Center widgets now work on iOS 18 and later (previously limited to the newest devices only) • Refreshed headers and navigation across the calculators, reference guides, your garage, and settings • Sharper dark-mode colors and consistency polish throughout ### 2.8.0 — 2026-04-20 - Improves the profile experience, to help unify the behavior across all channels, web and mobile ## Apps similar to Classic Mini Toolbox | App | Rating | Price | Category | | --- | --- | --- | --- | | [Moopies - Kids Learning Games](https://appshunter.io/ios/app/moopies-kids-learning-games/id6476114387) | 5.0 (2) | Free | Education | | [Geo Daily - Geography Quiz](https://appshunter.io/ios/app/geo-daily-geography-quiz/id6758110348) | — | Free | Education | | [Garstang St Thomas School](https://appshunter.io/ios/app/garstang-st-thomas-school/id6461727272) | — | Free | Education | | [Quizzation: AI Quiz Generator](https://appshunter.io/ios/app/quizzation-ai-quiz-generator/id6759560325) | — | Free | Education | | [Chess Openings Wizard](https://appshunter.io/ios/app/chess-openings-wizard/id1370631887) | 5.0 (2) | $6.99 | Education | | [161st Air Refueling Wing](https://appshunter.io/ios/app/161st-air-refueling-wing/id1310299886) | 5.0 (2) | Free | Education | --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-05.*