Take your deep-sky imaging library with you. AstroIndexer Companion is the read-only mobile companion to AstroIndexer Desktop - browse every target you have photographed, anywhere, fully offline.

TRY IT BEFORE YOU SYNC
A built-in demo library loads on first launch, so you can explore the app with real astrophotography data before pairing with your desktop.

YOUR LIBRARY, IN YOUR POCKET
- Every imaged object with exposure totals, frame counts and session history
- Full-screen image viewer: tap any target to fill the screen, swipe between objects, pinch to zoom
- Search and filter by catalogue (Messier, NGC, IC, Sharpless, vdB), object type and narrowband or broadband filter
- Filter by imaging year and sort by catalogue, name, date or integration time
- Representative previews of your processed images
- Catalogue completion: how much of the Messier or NGC list have you captured?

QUALITY AND CONDITIONS AT A GLANCE
- Quality metrics per target: FWHM seeing, SNR, star counts and an overall score
- Shooting conditions: moon illumination and separation, airmass, guiding RMS
- Per-night weather: temperature, humidity, dew point, cloud cover, sky quality
- Calibration coverage per target
- Per-filter exposure allocation charts

INSIGHTS ON THE GO
- ML-detected environmental patterns (moon impact, dew degradation and more) with plain-language recommendations
- AI digest summarising what your library needs next

YOUR EQUIPMENT
- Every rig with optics, sensor, gain and offset, site and sky quality
- Backfocus train with per-component breakdown and tolerance status

EASY SYNC, PRIVATE BY DESIGN
- Pair with AstroIndexer Desktop over your own Wi-Fi via QR code or 6-digit code - your data never touches a cloud server
- Or import an exported package file - no network needed at all

MADE FOR PHONE AND TABLET
- Guided walkthrough on first launch
- Adaptive tablet layout with a navigation rail and a four-column library grid

Built for astrophotographers by astrophotographers. Requires AstroIndexer Desktop (free trial at astroindexer.com) for your own data; the demo library works without it.