Part 107 Pass Live
FAA Part 107 knowledge test practice with 330 questions. Every answer quotes the exact 14 CFR text, the 24 chart questions use original diagrams, and the whole bank works offline.
Press
Press kit.
The bio, the facts and the marks in one place. Everything on this page can be quoted.
The one line
double nine is a solo iOS developer who builds small apps, ships them in public and posts the numbers.
The short bio
double nine designs, builds, tests and ships every app himself. There is no team, no studio and no funding behind the name.
Four apps exist. Part 107 Pass and SiteImprint are on the App Store; MiraBeam and Hoopwise are in build. Work starts on a store chart: find a category where people already pay and the paid products have stopped changing, then build the smallest app that fills that gap.
Facts
| Name | double nine (Double Nine) |
|---|---|
| What | Solo iOS developer |
| Site | doublenine.work |
| Apps | Four: two live, two in build |
| Live on the App Store | Part 107 Pass, SiteImprint |
| Platform | iOS 17 or later |
| support@doublenine.work | |
| Site language | English |
| Active since | 2026 |
| Last updated | 12 November 2026 |
The apps
SiteImprint Live
Jobsite documentation. Photos, checklists, issues, before and after pairs and a customer signature become one PDF report or one long image. It stays on the device and needs no account.
MiraBeam In build
Casts photos, video, music and the screen to a TV on the same Wi-Fi, using AirPlay, Google Cast and DLNA. No account, no upload.
Hoopwise In build
Imports a cross stitch PDF chart, rebuilds the symbol grid and marks stitches as they are worked, including charts that span several pages.
Logos
Use the paper mark on dark backgrounds and the mono mark when there is one colour. Do not recolour, rotate, stretch, outline or add a shadow, and do not place the mark on a photo. Keep clear space of at least half the mark's height.
How to cite
double nine. “Double Nine: solo iOS developer, four apps.” doublenine.work, 12 November 2026. https://doublenine.work/
What not to say
- Do not call it a studio, an agency or a company with employees. It is one person.
- Do not describe MiraBeam or Hoopwise as released. Neither is on the App Store.
- Do not publish revenue, install or rating figures for the apps. None are given on this site.
- Do not describe Part 107 Pass as official FAA material. It is a study aid and is not affiliated with the FAA.
Contact
For interviews, corrections or app questions: support@doublenine.work.