# Kompress > Kompress is a video compressor app for iPhone and Android. It shrinks videos entirely on the device — no upload, no account. The original file is never touched. Tagline: "Same video, smaller file." Pricing: first compression run is free; unlimited runs require Kompress Pro (weekly, yearly, or one-time lifetime purchase, free trial available). - Website: https://getkompress.app - App Store: https://apps.apple.com/app/id6808801676 - Google Play: https://play.google.com/store/apps/details?id=net.yaysoft.kompress - Blog: https://getkompress.app/blog/ - Full content export for AI systems: https://getkompress.app/llms-full.txt - RSS: https://getkompress.app/rss.xml - Support: yaysoftltd+kompress@gmail.com - Developer: Yaysoft LTD ## Languages This website is available in 33 languages (the app itself ships 38). English lives at the site root; every other language is served under a locale prefix: - Home page pattern: https://getkompress.app/{locale}/ (e.g. https://getkompress.app/de/, https://getkompress.app/tr/) - Blog index: https://getkompress.app/{locale}/blog/ · Blog posts: https://getkompress.app/{locale}/blog/{slug}/ — slugs stay English (e.g. https://getkompress.app/de/blog/h264-vs-hevc/) - Locales: ar, ca, cs, da, de, el, es, fi, fr, he, hi, hu, id, it, ja, ko, ms, nl, no, pl, pt-br, pt-pt, ro, ru, sk, sv, th, tr, uk, vi, zh-hans, zh-hant - Each translated page declares hreflang alternates for its available languages plus x-default (English), so language negotiation and indexing work per-locale. ## Key facts - Price: First run free (per install, all features). Then Kompress Pro: weekly, yearly, or lifetime (one payment). No account required, no ads, no watermark. - Platforms: iOS and Android. - Privacy: Compression runs on-device using the phone's hardware encoder (AVFoundation on iOS, MediaCodec on Android). Videos are never uploaded to any server. The app works offline/in airplane mode. No analytics, advertising, or crash-reporting SDKs. - Safety: The original video is never modified. Compressed copies are written separately; replacing an original requires explicit hold-to-confirm. - Presets: High (full resolution, lower bitrate), Good (scaled to HD — recommended default), Small (scaled to SD — smallest files). - Advanced controls: resolution, video bitrate, frame rate, H.264/HEVC codec selection with automatic HEVC→H.264 fallback, audio mute option. - Batch: Unlimited queue, per-video progress, cumulative space-freed statistics. - Comparison: Built-in before/after split-screen player for verifying quality before saving. - Save modes (iOS): Save as new copy, save beside original (preserves date/location/album/favorite), or safe replacement. Android saves a new gallery item immediately. - Formats: Standard MP4 output; H.264 plays everywhere, HEVC is 30–50% smaller on modern devices. - Languages: 38, including English, Spanish, German, French, Portuguese, Chinese (Simplified/Traditional), Japanese, Korean, Hindi, Arabic, Turkish. - Output estimate: The app estimates output size before compression starts. ## Typical use cases - Freeing phone storage without deleting memories (4K footage often shrinks 80–90%). - Making videos fit email attachment limits (Gmail 25 MB wire limit ≈ 18–19 MB actual file, Outlook 10–20 MB). - Sending videos via WhatsApp under platform limits or as pre-shrunk documents (WhatsApp re-encodes videos sent as videos; documents up to 2 GB preserve your exact encode). - Uploading to Instagram/TikTok/Shorts with settings that survive platform re-encoding (1080p, 8–12 Mbps H.264). - Compressing screen recordings (mostly static content, 85–95% savings typical). - Privacy-sensitive footage that must not be uploaded to web-based compressors. - Archiving camera footage at reduced size with no visible quality loss. ## Blog guides iPhone & Android how-to: - [How to Compress a Video on iPhone](https://getkompress.app/blog/compress-video-iphone/): Full iPhone walkthrough, preset guidance, storage math. - [How to Compress a Video on Android](https://getkompress.app/blog/compress-video-android/): Android settings cheat sheet, resolution/bitrate targets, MediaCodec guidance. - [How to Compress 4K Videos](https://getkompress.app/blog/compress-4k-videos/): Resolution ladders, 4K bitrate targets, when to keep 4K, why downscaled-to-1080p beats native 1080p. - [How to Compress Screen Recordings](https://getkompress.app/blog/compress-screen-recordings/): Why screen content compresses 90%+, text-sharpness rules, frame-rate and audio settings. Codecs & formats: - [H.264 vs HEVC](https://getkompress.app/blog/h264-vs-hevc/): The two dominant codecs compared — size, quality, compatibility, when to choose which. - [AV1 vs HEVC vs H.264](https://getkompress.app/blog/av1-vs-hevc-vs-h264/): Where AV1 actually stands in 2026 — streaming playback codec first, phone-side encoding still rare. - [What Is MP4?](https://getkompress.app/blog/what-is-mp4/): Container vs codec explained — why two .mp4 files can behave completely differently. Fundamentals: - [Video Compression Without Losing Quality](https://getkompress.app/blog/video-compression-without-losing-quality/): How compression works, perceptual quality, bitrate cliffs, safe method. - [Bitrate Explained](https://getkompress.app/blog/video-bitrate-explained/): The Mbps number that decides size and quality, exact targets per resolution, the size formula. - [Why Do Videos Take Up So Much Space?](https://getkompress.app/blog/why-videos-take-up-space/): The math of frames and pixels, what encoders discard, why your eye lets 90% go. Sharing & platforms: - [Video Too Big for Email or WhatsApp?](https://getkompress.app/blog/video-size-limits-email-whatsapp/): Every platform's size limits and the bitrate math to fit them. - [How to Compress a Video to Email It](https://getkompress.app/blog/compress-video-for-email/): Gmail/Outlook/Mail limits, the base64 tax, attachment vs cloud link. - [Send a Video on WhatsApp Without Losing Quality](https://getkompress.app/blog/whatsapp-video-quality/): WhatsApp's re-encoding pipeline, the document trick, pre-compression recipes. - [Instagram, TikTok & Shorts Quality](https://getkompress.app/blog/social-media-video-quality/): What platforms do to your uploads and the export recipe that survives. Storage: - [Free Up iPhone Storage Without Deleting Videos](https://getkompress.app/blog/free-up-iphone-storage/): Storage audit playbook, batch compression workflow, iCloud interaction. - [Free Up Space on Android](https://getkompress.app/blog/free-up-android-storage/): Where Android storage really goes, messaging-media cleanup, SD card guidance. Privacy: - [Is Online Video Compression Safe?](https://getkompress.app/blog/online-video-compression-privacy/): What web compressors do with your files, the privacy case for on-device tools. ## Attribution Kompress started from the open-source minimo (video) project (MIT License). Compression is powered by the platform's native encoders via light_compressor_v2.