Fast Frame Review

• Blink through a session — play, pause, and step through every sub like a flipbook to spot clouds, trailing, or focus drift at a glance.
• Keep or reject with a keystroke — cull hundreds of frames in minutes instead of hours.
• Rejected frames highlighted during blink — an optional red border makes it obvious which frames won't make the stack as you play through.
• Pixel and coordinate readout — hover any point in a frame for its raw value and sky coordinates, when available.

Objective Quality Analysis

• Automatic quality scoring — every frame is measured for star sharpness, roundness, background sky brightness, and star count, so you're not eyeballing hundreds of subs one by one.
• Judged against your own data — frames are compared to the rest of that target's collected data — typically spanning several nights — rather than a fixed universal standard. A wider pool gives the statistics something real to judge against, so one thin night doesn't get unfairly flagged, and a truly bad night stands out clearly against everything else you've gathered on that target.
• Conservative by default — only clear outliers get flagged; borderline frames are left for you or your stacking software to weigh, not silently thrown away.
• Know why a frame was rejected — each rejected frame is labeled by cause — optical (focus/tracking), transparency (thin cloud), or sky brightness (moon/light pollution) — so you can see if a night has a pattern worth fixing.
• Visual quality graph — plot any two metrics across the whole session, click a point to jump straight to that frame.
• Sortable results table — every frame's metrics side by side, so the worst offenders are obvious at a glance.
• Override any call — flip a frame from reject to keep (or back) before committing, no re-running the analysis required.
• Adjustable thresholds — save named profiles with your own cutoffs for sharpness, roundness, and sky brightness, and switch between them per session.
• Rejects never touch your originals — rejected frames are simply moved into a subfolder, never modified or deleted, so nothing is ever truly lost.

Stacking

• Automatic alignment — frames are matched and registered to each other with no manual star-picking.
• Handles meridian flips — a session that crosses the meridian mid-shoot is detected and aligned correctly rather than producing a smeared stack.
• Outlier rejection during combination — satellite trails, plane streaks, and cosmic ray hits are statistically excluded rather than baked into the average.
• Quick-look preview, not a final edit — a fast stacked preview to confirm a session is worth carrying into full processing elsewhere. It's a check on your data, not a production-quality result — final processing still happens in dedicated software.

Keyword Management

• Full header keyword editor — view and edit any capture metadata — target, filter, exposure, temperature, coordinates, and more — right from the app.
• Batch edits across a whole session — fix a mislabeled target or filter name on every frame at once instead of one file at a time.
• Look up any value on demand — pull a keyword from the current frame for use in scripted workflows.
• Carried through format conversion — metadata maps across FITS and XISF, so switching formats doesn't mean losing your capture data.

File Format Support

• FITS and XISF, read and write — the two standard astrophotography formats, both fully supported.
• Convert between them — load in one format, save in the other, no separate conversion tool needed.
• Color camera support — one-shot-color (Bayer) frames are recognized and debayered automatically wherever needed.

Automation & Batch Workflows

• Scriptable macros — chain culling, analysis, keyword edits, and stacking into a repeatable script instead of clicking through each session by hand.
• Every command works both ways — anything you can type into the console can also be dropped straight into a macro, and vice versa — no separate scripting-only command set to learn.
• Real scripting, not just a macro recorder — conditionals and basic math give macros actual logic, not just a fixed replay of clicks.
• Powerful logging — macros can log their own progress and decisions in detail, so a batch run overnight leaves a trail you can actually check in the morning.
• One-click Quick Launch buttons — pin your most-used scripts to a bar for instant re-use.
• Macro library — build, name, and reuse a personal collection of scripts across sessions.
• Console with history — run commands directly and step back through what you've already tried.

Analysis History & Sharing

• Export a session's analysis — save every frame's quality metrics and pass/reject verdicts as a portable report you can keep or share.
• Reload it later — bring an exported report back in to review a past session's results without needing the original files on hand.
• Log viewer — check exactly what the app did during a session, filterable by severity, with live auto-tail while it runs.

Cross-Platform

• Native desktop app — for Windows, macOS, and Linux — fast, offline-first, works entirely on your own machine.
• Selectable themes — including dark and low-light options for the observatory.

Data & Backup

• Local-first — your settings, macros, and profiles live in a database on your own machine, not someone else's cloud.
• One-click backup and restore — right from the Tools menu.