# ACE Checklist Editor vs MachDB

The clearest difference is review sentiment: MachDB at 100% against ACE Checklist Editor's 50%. MachDB also leads on rating (5.0 vs 3.8) and in-app purchases (none vs 10). ACE Checklist Editor's advantage is update cadence (every 4 days vs every 2 weeks). On price, ratings volume, ads and device support there is nothing between them.

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, 5.0 against 3.8. Both are backed by a comparable volume of ratings — 4 and 3 respectively. Written reviews point the same way: 50% of ACE Checklist Editor's written reviews are positive against 100% of MachDB's.

ACE Checklist Editor ships an update every 4 days, MachDB every 2 weeks. The most recent releases landed on October 17, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | ACE Checklist Editor | MachDB |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (4 ratings)](https://appshunter.io/ios/app/ace-checklist-editor/id6748047077/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/machdb/id6757681004/reviews)** |
| Number of ratings | **4** | 3 |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 2 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 13 MB | 16 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Patrick Michalina](https://appshunter.io/developer/1823351786) | [MachDB LLC](https://appshunter.io/developer/1868240819) |

## What reviewers say

### ACE Checklist Editor

[App page](https://appshunter.io/ios/app/ace-checklist-editor/id6748047077)

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.

**Highlights:** 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

**Features:** Family Sharing

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ACE Pro Monthly | $5.99 | per month |
| ACE Pro Annual | $49.99 | per year |
| Fly Mode (Lifetime) | $4.99 | one-time |
| PDF Export (Lifetime) | $9.99 | one-time |
| Beechcraft Baron B55 (BE55) | $9.99 | one-time |
| Beechcraft Baron B58 (BE58) | $9.99 | one-time |
| Beechcraft Baron B58P (B58T) | $9.99 | one-time |
| Beechcraft Duchess (BE76) | $9.99 | one-time |
| Piper JETPROP (PA46) Checklist | $9.99 | one-time |
| ACE File Access (Lifetime) | $99.99 | one-time |


### MachDB

[App page](https://appshunter.io/ios/app/machdb/id6757681004)

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.

**Highlights:** 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

**In-app purchases:** none


## Frequently asked questions

### Is ACE Checklist Editor free?

ACE Checklist Editor is free to download, with in-app purchases available.

### Is MachDB free?

MachDB is free to download, with no in-app purchases.

### Which has better reviews, ACE Checklist Editor or MachDB?

MachDB is rated higher. ACE Checklist Editor averages 3.8 out of 5 from 4 ratings, while MachDB averages 5.0 from 3 ratings.

### Do ACE Checklist Editor or MachDB have ads?

Neither ACE Checklist Editor nor MachDB shows ads.

### Which is updated more often, ACE Checklist Editor or MachDB?

ACE Checklist Editor ships an update every 4 days, and MachDB every 2 weeks. Most recently, ACE Checklist Editor was updated on October 17, 2026 and MachDB on October 8, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*