MultiGaragem vs B737 Maintenance Mastermind
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MultiGaragem
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MultiGaragem keeps track of where every car is parked — across all your garages, and the ones your family or friends share with you. No more "who has the keys?" or "which car is blocking mine?" TRACK YOUR CARS • Create locations (garages, driveways, parking areas) with named spaces. • Add cars with photo, license plate, owner and notes. • Park and move cars by dragging them between spaces, or onto the Street. • Blocked-car warnings tell you which car is boxing another in. SHARE WITH FAMILY & FRIENDS • Share a whole location with another iCloud user — you both see the same spaces and cars, and they can park their own cars there. • Or share a single car with someone specific. • Stop sharing at any time. Sharing is invitation-only. DOCUMENTS & REMINDERS • Attach documents to each car — scan them, or import photos and PDFs. • Text is recognized on your device, so you can search inside documents. • Add events (inspection, insurance renewal, maintenance) with optional Calendar reminders. PRIVATE BY DESIGN • Your data lives in your own private iCloud. There is no MultiGaragem server, and we cannot see your data. • No tracking. No ads. No analytics. • Sharing is end-to-end encrypted by iCloud. • Optional on-device intelligence generates a tidy Car Dossier — nothing leaves your phone. ALSO INCLUDED • Home Screen & Lock Screen widgets. • Apple Watch companion. • Ask Siri where a car is, what's parked where, or what's blocked. • Export your data anytime as a private backup. Free, with no in-app purchases. **What's New (v1.0):** First public release of MultiGaragem. • Track cars across multiple locations. • Share locations and cars with family and friends via iCloud. • Attach documents and reminders to each car. • Widgets, Apple Watch, and Siri support. • Private by design — your data stays in your own iCloud. S: Thank you to everyone who contributed, tested, and suggested ideas — Alena (this one's in Russian for you!), Buddy (for the availability and insight), and my brother Pedro, who gave me the idea for it.
B737 Maintenance Mastermind
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B737 Maintenance Mastermind is an independent quick-reference and utility app designed to support aircraft technicians, engineers, mechanics, and aviation professionals working with Boeing 737 NG and MAX aircraft. The B737MM app combines fast offline tools with secure premium reference modules, helping users quickly find maintenance-related information, calculations, references, and troubleshooting guidance during study, training, planning, or daily technical routines. FREE TOOLS • MEL Calculator Quick helper for standard dispatch time limit calculations. • Unit Converter Fast conversion of common aviation units, including pressure, temperature, volume, weight, and fuel-related values. • Fuel Calculator Useful fuel uplift and density calculation tool for quick planning and cross-checking. • Abbreviations Dictionary Large searchable glossary of aviation, maintenance, and technical abbreviations. PREMIUM REFERENCE MODULES • Alerts Searchable cockpit alert, status, and message references with related technical context. • Flags Reference guide for PFD, ND, FMC/CDU, and display flags. • BITE Built-In Test Equipment reference module with test access information and related troubleshooting links. • MEL Reference Fast searchable Minimum Equipment List reference support for NG/MAX style workflows. • CDL Reference Configuration Deviation List reference module for missing or deferred aircraft configuration items. • Circuit Breakers / CB ATA-grouped circuit breaker reference with panel-related information. • Lights Cockpit, annunciator, and system light reference module with related system context. • Location Aircraft component, access panel, service panel, antenna, and equipment location references. • STA Map Station, frame, stringer, waterline, and aircraft location reference helper for quick orientation. • Visual Panels Interactive visual reference for cockpit panels and related light/panel locations. • Support & Materials Technical support notes, fastener/material references, practical troubleshooting notes, and maintenance helper information. PREMIUM ACCESS Premium reference modules open with an auto-renewable yearly subscription (with a 3-day free trial for eligible users) or a one-time lifetime purchase, both offered in the app. Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless it is cancelled at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours before the end of the current period. You can manage or cancel your subscription in your Apple Account settings at any time after purchase. Use Restore Purchases in the app to restore access on a new device. Some premium content requires internet access for first download, access verification, or content updates. Once downloaded, content is available on the device for fast access. IMPORTANT DISCLAIMER This application is an independent reference and training support tool. It is not official Boeing documentation and is not affiliated with, endorsed by, sponsored by, or associated with The Boeing Company, any airline, aircraft operator, maintenance organization, or aviation authority. The information in this app is provided for educational, training, and general reference purposes only. The official Aircraft Maintenance Manual (AMM), Fault Isolation Manual (FIM), Illustrated Parts Catalog (IPC), Wiring Diagram Manual (WDM), Structural Repair Manual (SRM), and the operator-approved MEL/CDL are the only official sources and must always take precedence. Do not use this application as the sole source for aircraft maintenance actions, dispatch release decisions, operational decisions, or work on an actual aircraft. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://b737mm.com/privacy/
Screenshots
Verdict
The clearest difference is in-app purchases: MultiGaragem at none against B737 Maintenance Mastermind's 4. B737 Maintenance Mastermind's advantage is update cadence (every 3 days vs monthly). On price, ads, device support and iOS requirement 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
Both are free to download. B737 Maintenance Mastermind sells 4 in-app purchases, starting at $8.99 per year. MultiGaragem asks for nothing beyond the download.
MultiGaragem ships an update monthly, B737 Maintenance Mastermind every 3 days. The most recent releases landed on November 5, 2026 and November 6, 2026 respectively.
| Parameter | MultiGaragem | B737 Maintenance Mastermind |
|---|---|---|
| Price | Free | Free |
| Update frequency | Monthly | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Requires iOS | 18.4 | 18.0 — better |
| Further details — not scored | ||
| Size | 30 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Nuno Sousa | Nemanja Dimitrijevic |
In-app purchases
MultiGaragem
No in-app purchases
B737 Maintenance Mastermind
- Premium Yearly3 Days trial$8.991 Year
- Lights & CB Lifetime$6.99
- Lifetime Upgrade$12.99
- Premium Lifetime$17.00





