SnapCrop
The screenshot tool Android should have shipped with.
Auto-detect, auto-crop, annotate, redact, and share screenshots — all in one tap. No ads, no tracking, no internet required.
  
Why SnapCrop?
Taking a screenshot on Android gives you a raw capture with status bars, navigation bars, and ugly borders. You open a separate editor, crop manually, then switch to another app to annotate. SnapCrop replaces that entire workflow:
- Take a screenshot — SnapCrop detects it instantly
- Auto-crop — Status bars, nav bars, and borders are stripped automatically
- Edit — Annotate, redact, adjust, OCR, or just save
- Done — One app, zero friction
Features
Instant Screenshot Detection
- Background service monitors for new screenshots and opens the editor automatically
- Rich notification with thumbnail preview + Edit, Share, and Quick Crop actions
- Quick Settings tile to toggle monitoring on/off
- Delayed capture mode (3 / 5 / 10 second countdown)
- Survives reboots — auto-starts with your device
Smart Auto-Crop
- System bar stripping — Reads exact status/nav bar heights from Android (works on transparent bars too)
- Border detection — Removes uniform borders from any screenshot, light or dark mode
- AI crop — ML Kit object detection for content-aware cropping
Powerful Editor — 5 Modes
Crop
- Drag corners/edges with edge magnetism (snaps to guides)
- Precision mode — hold 800ms for 4x slower, pixel-perfect dragging
- 18 aspect ratios including 7 shape crops (circle, star, heart, triangle, hexagon, diamond, rounded rect)
- Free rotation slider (-45 to +45 degrees)
- Gradient backgrounds for shape crops (6 presets)
- Grid overlays (rule of thirds / golden ratio)
- Tap dimensions for exact pixel input
- Before/after swipe comparison
- Live file size estimate
Draw — 16 Tools
| Tool | What it does |
|---|---|
| Pen | Smooth freehand with velocity-based stroke width |
| Arrow | Line with arrowhead |
| Line | Straight line between two points |
| Rectangle | Optional fill |
| Circle / Ellipse | Optional fill |
| Text | Tap to place, optional background pill |
| Highlight | Semi-transparent marker (40% alpha) |
| Callout | Auto-numbered circles (1, 2, 3...) |
| Spotlight | Dims everything except your selection |
| Magnifier | 2x zoomed inset with crosshair |
| Emoji | 20 common emojis, tap to place |
| Neon | Glowing 3-layer pen effect |
| Blur Brush | Gaussian blur along your stroke |
| Eraser | Erase to transparent |
| Flood Fill | Fill a region with your selected color |
| Heal | Content-aware inpainting (removes blemishes) |
All tools support: custom colors (6 presets + full RGB picker + eyedropper), adjustable width, dashed lines, undo/redo.
Pixelate
- Draw rectangles to mosaic-redact sensitive info
- One-tap face blur powered by ML Kit (shows face count)
OCR
- Tap any text block to copy it
- Scan QR codes and barcodes
- Double-tap a text block to crop directly to it
Adjust — 13 Sliders + 17 Filters
- Brightness, Contrast, Saturation, Warmth, Vignette, Sharpen, Highlights, Shadows, Tilt-Shift, Denoise
- Per-channel RGB curves
- 17 filters: Mono, Sepia, Cool, Warm, Vivid, Vintage, Noir, Fade, Invert, Polaroid, Grain, Red/Blue/Green Pop, Glitch + Auto-enhance
Gallery
- Browse all photos and videos by album
- Pinch-to-zoom grid (2-6 columns)
- Fullscreen viewer with pinch zoom (up to 5x)
- Multi-select for batch delete, share, resize, or PDF export
- Favorites, search, and sort by date/name/size
More Tools
- Image Stitching — Combine 2+ images vertically or horizontally with reorder controls
- Collage Maker — 25 grid layouts, adjustable gaps, multiple aspect ratios
- Device Frame Mockup — Wrap screenshots in Pixel, iPhone, Samsung, or flat device frames
- Background Removal — One-tap ML Kit subject segmentation
- Color Palette — Extract 6 dominant colors with hex codes and percentages
Export Options
- Formats: PNG, JPEG, or WebP with quality slider
- Target file size: Set a KB budget, SnapCrop auto-adjusts quality to hit it
- Custom filenames: Templates with
%timestamp%,%date%,%time%,%counter% - Save location: Pictures, DCIM, or Downloads
- Extras: Export border, watermark overlay, EXIF stripping, delete-original toggle
Download
Grab the latest APK from **Releases** and sideload it.
Requirements:
- Android 10+ (API 29)
- Google Play Services (for ML Kit features)
Tech Stack
| Language | Kotlin |
| UI | Jetpack Compose + Material 3 |
| Theme | AMOLED black with Catppuccin Mocha accents |
| ML | ML Kit (Object Detection, Text Recognition, Face Detection, Barcode Scanning, Subject Segmentation) |
| Image Loading | Coil 2.7 |
| Min SDK | 29 (Android 10) |
| Target SDK | 35 |
Build from Source
git clone https://github.com/SysAdminDoc/SnapCrop.git
cd SnapCrop
./gradlew assembleRelease
The signed APK will be at app/build/outputs/apk/release/app-release.apk.
Requires JDK 17 and the Android SDK.
License
MIT — use it, fork it, improve it.