Independent apps for iPhone and iPad

Small apps that do one job well.

I’m David. I make focused apps for practicing sports, fixing photos, and everyday tasks. Many of them do all their work right on your device, and none of them want an account just to get started.

Best sellers

SwingDraw

Golf swing analyzer for iPhone and iPad

Draw lines and angles on your golf swing video, trace the swing path, check head and body movement, and compare two swings side by side.

  • Slow motion, frame by frame
  • Swing path trace and body tracking
  • Lines, angles, and side-by-side compare

$9.99 once · no subscription

SwingDraw tracing the swing path over a golfer at the top of the backswing

Local Photo Upscaler

Private photo upscaler for iPhone, iPad, and Mac

Enlarge small or blurry photos up to 4×, reduce noise, sharpen soft detail, and restore faces. Everything runs on your device, so nothing is uploaded.

  • Upscale up to 4×
  • Denoise, sharpen, and restore faces
  • Works offline, no upload, no account

$9.99 once · no subscription

Before: a 300 × 387 cat photo enlarged four times without upscalingAfter: the same cat photo upscaled four times in Local Photo Upscaler
BeforeAfter 4×
New on the App Store

Video Delay

Prop up your phone, do your rep, and watch it back seconds later. Hands-free. Slow motion, drawing tools, and TV output for golf, baseball, tennis, gymnastics, and more.

See how it works →
A golfer mid-swing at a driving range while a propped-up iPhone shows the same swing on a delay.

Sports & practice 3

Photos & video 6

Everyday tools 5

Also on the web

Need help with an app?

Email me at help@davidb.app. Tell me which app, your device, and what happened, and I’ll get back to you.

Email help@davidb.app