Astrophotography / iPhone

Bring the night
into focus.

Choose a target. Follow the ring.
Hold still when it locks.

Astrosimo takes care of focus, alignment and stacking. You stay with the sky.

Discover Astrosimo
Hubble’s view of Andromeda: dense starlight crossed by dark dust lanes.
Andromeda · Reference imageEditorial reference image. Hubble imagery, not an Astrosimo capture.

NASA, ESA, J. Dalcanton (University of Washington, USA), B. F. Williams (University of Washington, USA), L. C. Johnson (University of Washington, USA), the PHAT team, and R. Gendler. Image source · License & image use

From sky to photograph

A little guidance.
A longer look.

  1. Choose a target.

    Find the Moon, star fields, clusters, nebulae and galaxies in a catalog ranked for your location and the night ahead.

  2. Follow the ring.

    Move your iPhone until the target meets the center. Hold still when it locks.

  3. Hold still.

    Capture starts when the ring locks; the shutter can still cancel. Astrosimo focuses, aligns and stacks your frames, rejects the ones that move, then finishes the photograph on your iPhone.

The Astrosimo Capture interface with its alignment ring and shutter.
Capture / Astrosimo for iPhone
Astrosimo’s Library: Your night sky, collected.
Library / Before your first capture

Collect

A record of
your nights.

Keep your photographs and the settings behind them together. Revisit a session, inspect a detail, or take your favorite image with you.

Yours to keep.

Processing happens on your iPhone. Finished photos save to Photos. A smaller backup of each session stays in your own iCloud, with only an approximate location — it is not a full-resolution original.

Read our privacy policy

Free & Pro

Start with the sky.

The complete automatic workflow is free. Pro gives you more room to work.

Free

$0

Point, capture, keep.

  • Unlimited automatic capture with star focus, exposure and white balance
  • Frame registration, stacking and rejection
  • Automatic gradient removal and stretch; photos up to 2200 px on the long side
  • Photo, plus Trails and Time-lapse sessions of 5 or 10 minutes
  • Target planning, Library and capture settings

Pro

$34.99/ year

Larger stacks. Longer sessions.

  • Everything in Free, with capture still automatic
  • Linear RAW stacking where supported; output up to 4096 px on the long side
  • Manual exposure, ISO, white balance and focus with loupe and peaking
  • Optional dark frames, adjustable gradient removal and stretch, and 16-bit TIFF export
  • Trails and Time-lapse sessions up to 30 minutes, plus photo verification

7-day trial on the yearly plan for eligible new subscribers. Or $7.99/month. US prices; auto-renews until cancelled.

Time-lapse sessions produce clips of about 6–13 seconds, depending on session length. Localized pricing and trial eligibility appear before purchase. Subscription terms

Astrosimo for iPhone

Your next night out.

Preparing for App Store launch.

Get launch notice