ACE Checklist Editor vs MachDB
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ACE Checklist Editor
Create, manage, and execute aviation checklists digitally. Designed for pilots, it offers offline functionality, professional templates, and multi-format import/export for enhanced safety and efficiency in the cockpit.
- Digital aviation checklist creation
- Offline functionality
- Multi-format import/export (ACE, ForeFlight, Dynon)
- Professional templates
- Challenge & Response format
- Revision history
- Smart organization by aircraft or phase of flight
Read full descriptionHide full description
Transform Your Aviation Safety with Professional Digital Checklists ACE Checklist Editor is the professional pilot's choice for creating, managing, and executing aviation checklists on your iPhone, iPad, and Mac. Designed by pilots for pilots, ACE brings the reliability of paper checklists into the digital age with powerful features that enhance safety and efficiency. WHY PILOTS CHOOSE ACE • Universal Compatibility - Import and export checklists in ACE (.ace), ForeFlight (.fmd), and Dynon formats • Industry-Standard ACE Format - Compatible with Garmin avionics and other systems that support ACE files • Works Offline - All your checklists are stored locally on your device. No internet required in flight • Professional Templates - Start with expertly crafted templates for popular aircraft or create your own from scratch • External Drive Sync - Keep your checklists synchronized across devices using external drives • Smart Organization - Group checklists by aircraft, phase of flight, or custom categories SAFETY-FIRST DESIGN • Challenge & Response Format - Clear distinction between checklist items and expected responses • Emergency Procedures - Quick access to critical checklists with high-visibility formatting • Warning & Caution Items - Color-coded alerts for critical items that demand attention • Revision History - Track all changes with complete version control • No Distractions - Clean, focused interface designed for cockpit use POWERFUL FEATURES • Multi-Format Import & Export - Share checklists in Garmin (.ace) [.gcl and .gplts coming soon], ForeFlight (.fmd), or Dynon formats with other pilots and avionics systems • ForeFlight Integration - Import your existing ForeFlight checklists and export back in encrypted .fmd format • Dynon Compatibility - Full support for Dynon SkyView checklist format with proper line wrapping • Multiple Aircraft - Manage checklists for your entire fleet in one app • Customizable Sections - Organize by phase of flight: Preflight, Startup, Taxi, Takeoff, Cruise, Landing, Shutdown • Rich Formatting - Add notes, references, conditional items, and amplified procedures • Search & Filter - Quickly find any checklist or item across your entire library BUILT FOR REAL PILOTS Whether you're a student pilot building good habits, a CFI managing training aircraft, or a professional pilot flying complex aircraft, ACE adapts to your needs: • Student Pilots: Learn proper checklist discipline with clear, organized procedures • Flight Instructors: Create standardized checklists for your training fleet • Aircraft Owners: Maintain custom checklists that match your specific equipment and STCs • Professional Pilots: Manage multiple aircraft types with airline-style formatting ONE APP, EVERY DEVICE • Native iPhone, iPad, and Mac apps, all in one download • Edit on the Mac with a full desktop window, menus, and keyboard • Document-based app - Open .ace files directly from Files, email, or other apps • iCloud backup keeps your data safe YOUR DATA, YOUR CONTROL • All checklists stored locally on your device but auto synced via iCloud to other devices you control. • No account required • Core checklist editing is available without a subscription; optional subscriptions and lifetime purchases unlock additional features • Export your data anytime in ACE, ForeFlight, or Dynon formats • Privacy-focused: We never see your checklists IMPORTANT SAFETY NOTICE ACE Checklist Editor is designed to assist pilots but does not replace your aircraft's official Pilot Operating Handbook (POH) or FAA-approved flight manual. Always verify checklist items against your aircraft's official documentation. Every aircraft is unique with different equipment and STCs. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Additional Terms: https://www.acechecklist.com/terms Privacy Policy: https://www.acechecklist.com/privacy
MachDB
Easily download and transfer Garmin avionics database updates to an SD card using your iPhone or iPad. This app supports a wide range of Garmin avionics and requires only a standard USB-C SD card reader. Updates are fast and convenient for field use.
- Download Garmin database updates
- Transfer updates to SD card
- iPhone and iPad compatible
- Supports various Garmin avionics
- Uses standard USB-C SD card reader
- Fast Wi-Fi/Cellular downloads
Read full descriptionHide full description
MachDB allows you to download and transfer aviation database updates to an SD card or USB key in seconds using your iPhone or iPad for fast updates in the field. Supports Garmin, Avidyne, and Pro Line avionics. All you need is your iPhone or iPad and a standard USB-C SD card reader (for SD updates) or USB-A to C cable (for USB updates). No proprietary hardware required! Download updates fast over Wi-Fi or Cellular connections. MachDB is compatible with all modern Garmin, Avidyne, and Pro Line avionics, using your existing Jeppesen or Garmin database account. No additional subscription or cost required. Supported avionics include: -Garmin G1000, G1000 Nxi, Perspective and Perspective + -Garmin G2000, G3000, G3X and Perspective Touch -Garmin Axis, G500, G600, G700, GTN 600 and 700 Xi -All other Garmin avionics using SD card or USB key for updates -Avidyne IFD, Vantage, and Entegra -Collins Pro Line 21 and Pro Line Fusion Supported Database Providers: -Jeppesen -Garmin
Screenshots
Verdict
The clearest difference is rating: MachDB at 4.3 against ACE Checklist Editor's 3.2. MachDB also leads on in-app purchases (none vs 10) and review sentiment (67% vs 50%). ACE Checklist Editor's advantage is update cadence (every 4 days vs fortnightly). On price, ratings volume, ads and device support 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. ACE Checklist Editor sells 10 in-app purchases, starting at $5.99 per month. MachDB asks for nothing beyond the download.
MachDB holds the better App Store score, 4.3 against 3.2. Both are backed by a comparable volume of ratings — 5 and 6 respectively. Written reviews point the same way: 50% of ACE Checklist Editor's written reviews are positive against 67% of MachDB's.
ACE Checklist Editor ships an update every 4 days, MachDB fortnightly. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.
| Parameter | ACE Checklist Editor | MachDB |
|---|---|---|
| Price | Free | Free |
| Rating | 3.2 (5 ratings) | 4.3 (6 ratings) — better |
| Positive reviews | 50.0% of reviews | 66.7% of reviews — better |
| Number of ratings | 5 | 6 — better |
| Update frequency | Every 4 days — better | Fortnightly |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 13 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Patrick Michalina | MachDB LLC |
Customer experience
ACE Checklist Editor
MachDB
In-app purchases
ACE Checklist Editor
- ACE Pro Monthly$5.991 Month
- ACE Pro Annual$49.991 Year
- Fly Mode (Lifetime)$4.99
- PDF Export (Lifetime)$9.99
- Beechcraft Baron B55 (BE55)$9.99
Show 5 moreShow fewer
- Beechcraft Baron B58 (BE58)$9.99
- Beechcraft Baron B58P (B58T)$9.99
- Beechcraft Duchess (BE76)$9.99
- Piper JETPROP (PA46) Checklist$9.99
- ACE File Access (Lifetime)$99.99
MachDB
No in-app purchases
Questions
Is ACE Checklist Editor free?
Is MachDB free?
Which has better reviews, ACE Checklist Editor or MachDB?
Do ACE Checklist Editor or MachDB have ads?
Which is updated more often, ACE Checklist Editor or MachDB?
Other comparisons















