★ Public beta

Smart astrophotography, on your phone.

The Moon handheld tonight, nebulae through your telescope tomorrow: AstroStackerPro stacks hundreds of shots and pulls out what the eye can’t see. No account, no subscription, all on your phone.

iPhone and Android
Offline-first
No account, no tracking

Photo taken with a phone, not a screenshot of the app.

up to 200
Frames in the manual control, sigma-clip
6
Ready-made presets, from the Moon to deep sky
JPEG+TIFF
Export in two formats (on Android the TIFF is optional)
0
Network connections
Made with AstroStackerPro

Real photos, straight from the app.

Two photos saved by the app during the beta. The buttons show the steps of the pipeline: the single shot, the stack and the result of the app’s Editor, with the adjustments used. The capture data comes from the metadata AstroStackerPro writes into every file: open the original and check it.

The Moon photographed through a telescope with a phone, a 30-frame stack made with AstroStackerPro

The Moon through a telescope

Processed in the AstroStackerPro Editor: auto adjustment, contrast +35%, sharpness 40% · exported as maximum-quality JPEG

Open the original
Starry sky above lit vegetation, a photo made with AstroStackerPro

Starry sky

Processed in the AstroStackerPro Editor: auto adjustment, exposure +27%, contrast +25%, sharpness 21%; the light-pollution filter, set to auto, made no change · exported as maximum-quality JPEG

Open the original
Features

Everything you need, on your phone.

Four concrete tools that grow with you, from the Moon shot handheld tonight to deep sky on your star tracker.

The stacking that reveals the sky

Stack up to 200 frames in the manual control, with sigma-clip: it discards satellites, planes and hot pixels, then averages the rest to pull out stars and detail invisible to the naked eye, right on your phone. Processing starts once the session ends, with a preview of the composite while it works. The work that used to belong to a laptop and stacking software now happens entirely on the phone.

It reads the sky for you

Point your phone: stars, constellations, the Moon and planets appear in the viewfinder, placed using GPS and motion sensors. Field recognition runs once the stack is done and tells you which constellation you framed. The planner tells you what’s worth shooting tonight (Moon, planets, Milky Way), along with an estimate of your area’s Bortle class.

Guided, from the Moon to deep sky

Six ready-made presets, from the Moon to deep sky: pick a subject and start shooting. The planner tells you how dark your sky is (estimated Bortle class), Moon times and tonight’s visible planets for your location. Viewfinder with focus peaking, automatic star alignment after the shot, and a solar safety warning the first time you open the app.

Absolute privacy, all on the phone

No account, no subscriptions, zero network connections: processing stays entirely on your phone. Photos go to the “AstroStackerPro” album and you can import existing shots for stacking and editing. On iPhone a capture session always saves two files, JPEG and 16-bit TIFF; on Android the TIFF is optional; from the Editor you pick one format at a time.

Gear

What you actually need.

Start tonight without buying anything and grow at your own pace. When you move to deep sky, mount your phone on your rig: capture, alignment, stacking and export all happen on the phone, the laptop stays home. It doesn’t replace the tripod or the telescope.

Moon, starry skies, star trails

Just your phone, resting on a wall or a mini tripod

Zero cost: go out tonight and bring home your first photo of the sky.

Deeper skies, meteor showers

Any photo tripod, even a cheap one

With a steady base you stack more frames, and every extra frame is noise that goes away.

Milky Way, nebulae, deep sky

Tripod, star tracker and often a telescope: your rig, with the phone mounted on top

The mount tracks, the phone captures and stacks: to get started you don’t need a dedicated astro camera, and the laptop stays home.

Availability

What ships at launch, what comes next.

Everything that ships at launch, and what comes after.

Capture
  • Multi-frame capture in Linear DNG where your phone and lens allow it, with automatic fallback to 10-bit HEVC
  • ProRAW and Linear DNG
  • Volume buttons as remote shutter, useful with the phone on a tripod
  • Technical log export from the app, to attach to a bug report
  • Pre-prompt permissions onboarding with an explicit tap
Stacking & alignment
  • On iPhone, a disk-backed pipeline: frames are written as they’re captured and combined when the session ends, from 30 to 200 in the manual control
  • On iPhone, sigma-clip in the sky presets with nothing to tune; on Android you choose between average, median, sigma-clip and maximum
  • Automatic star registration with robust fallback
  • Lucky imaging on the Moon and planets: a burst of very short exposures; the app keeps the sharpest frames (30% on iPhone) and aligns them
Astronomy & planner
  • Six guided presets: Moon, Jupiter and planets, Starry sky, Deep sky, Star Trails (on iPhone also Illuminated night; on Android also Saturn).
  • Planner with a worldwide Bortle class estimate, Moon, planets and “what to shoot tonight”
  • Field recognition once the stack is done: star triangles matched against a local catalog of 2,850 stars (HYG v3 data, Hipparcos identifiers); at least 8 stars are needed in the image
  • Sky overlay: 32 IAU constellations and 2,850 stars down to magnitude 4.5, not available with the telephoto lens
Editing & export
  • Editor with noise reduction, sharpening, saturation, exposure, contrast, shadows and highlights; a three-state digital astro filter for light pollution (Off/Auto/On)
  • Night tonal recovery after stacking
  • On the Moon and planets, the session automatically splits into short and long exposures and merges them into a single file
  • Export to JPEG and 16-bit TIFF (on Android the TIFF is optional)
  • Shareable presets: export a preset as a JSON file (.asppreset.json) and send it via AirDrop or Messages
Coming next
  • Sky Tonight — an evening notification with what’s worth shooting (Moon, planets, Milky Way, Bortle). Today you can see the same list by opening the Planner.
  • Cinematic Edit Presets — curated editing looks: Nebula Pop, Milky Way Vivid, Lunar Crisp, Aurora Boost, Deep Sky Soft
  • Stacking time-lapse — export a video showing the stack revealing itself frame by frame
  • Multi-field mosaicking — panoramic Milky Way stitching, aligned on the stars
  • AstroStackerPro for iPad — large-screen layout, full-page Planner, Apple Pencil support
Under exploration

Ideas under technical evaluation.

  • Astro Locations — map of nearby dark skies
  • Stack Comparison — before/after slider of the stack
  • Lightroom workflow — export with .xmp sidecar
Screenshots

Inside the app.

A minimal gallery showing the workflow, from capture to export.

Privacy by design

Your images stay yours.

AstroStackerPro makes no network connections: no accounts, no analytics, no ad trackers. All processing happens on the device. Period.

Read the Privacy Policy
  • No account required
  • No automatic upload
  • No analytics in the app, no trackers
  • No profiling
  • Static site, no non-essential cookies
Who it’s for

Made for people who look up.

01

People who want to start astrophotography tonight: for the Moon, starry skies and star trails, a phone and something to rest it on are enough.

02

People shooting the Moon, the Milky Way and the night sky who want tools more serious than a basic night mode.

03

People who want a mobile pipeline that includes stacking, noise reduction and export to formats like 16-bit TIFF.

04

People who care about staying in control of their shots and prefer an offline app to a cloud service.

Get ready to shoot the sky with your phone.

AstroStackerPro is in beta: public on iPhone via TestFlight, in closed testing on Android via Google Play. Join in and help us make it better.