Video Compressor: Photo Review

Shrink large 4K and HD videos straight on your iPhone, then review the duplicates, near-identical bursts and screenshots quietly filling your camera roll. Video compression runs through Apple's AVFoundation; photo matching runs on Apple's Accelerate and Vision frameworks. Everything happens on-device — nothing is uploaded, and no account is required. VIDEO COMPRESSION THAT SHOWS ITS WORK - Three export presets — 1080p, 720p and 480p — for MP4 movies of any length. - See the estimated size before you export, so you know what each file will save you. - A pre-flight storage check confirms there's room to write the new file before compression starts. - Compressed copies are saved back into your Photos library, ready to share, message or upload anywhere. - Exports run on a dedicated background engine, so long 4K clips don't freeze the app. FIND DUPLICATE AND SIMILAR PHOTOS - Exact duplicates are matched across your whole library, however many years apart they were saved. - Similar shots — burst sequences, retries, the same scene five times — are grouped by visual structure, not by file name or date. - Matching combines a 64-bit gradient hash, a hardware-accelerated DCT perceptual hash built on Apple's Accelerate (vDSP) framework, and 2D Haar wavelet analysis. - Similar videos are compared using Apple Vision feature prints after a duration and resolution pre-filter. - Move the sensitivity slider and the entire library regroups in memory in milliseconds. REVIEW BEFORE ANYTHING IS REMOVED - Open any group into a side-by-side workspace with synchronized pinch-to-zoom and pan, so you can compare two shots at the same point in the frame. - Every photo carries a quality score drawn from sensor resolution tier (12MP vs 48MP), Vision facial sharpness and exposure histogram analysis. - Four selection strategies: Keep Best, Keep Newest, Keep Largest, Keep Favorites. - Favorites stay protected, and you confirm every deletion yourself. MERGE DUPLICATE CONTACTS WITHOUT LOSING DATA - Duplicates are found using normalized phone suffixes, email keys and name permutations, then scored with Levenshtein name matching. - Merging is non-destructive: every unique number, email and address is kept, along with the most complete name, the best contact photo and the earliest birthday. - A local JSON snapshot is written before each merge, so there's an audit trail on your device. ON-DEVICE BY DESIGN - Zero third-party analytics, advertising or crash-reporting SDKs. - Zero URLSession calls — the app makes no network requests with your media. - The only network activity is Apple's StoreKit purchase flow talking to Apple's servers. - Permissions are explained before they're requested, never demanded at launch. WHY THIS ISN'T ANOTHER STORAGE TOOL Most storage apps sort by file size and hand you a checkbox list. This one analyzes the media itself: DCT and wavelet decomposition on Apple Silicon, Union-Find clustering to build groups, actor-isolated Swift 6 concurrency so scans stay responsive on libraries with tens of thousands of items, and an interactive comparison canvas instead of a bulk-delete screen. Compress the movies, merge the duplicates, keep the shots worth keeping — and get your GB back. Terms of Use (EULA): https://docs.google.com/document/d/1mszcQQ2s3ao2M002cUZ4iRNVOzAG1N-8tB8oOM5vzkE/preview Privacy Policy: https://docs.google.com/document/d/1CB92mXz-Ivk1oVq9YmbOLS9hWaWhROm8LDuXGEjm44o/preview