Mobile Preset Video Editing App

I want to turn a set of ready-made presets into a polished mobile editor that runs on both iOS and Android. The main idea is simple: a user imports one or more clips, taps a preset, tweaks intensity if desired, then exports a finished video ready for social sharing.

Core features
• Import from camera roll or file picker, trim and reorder clips on a basic timeline.
• One-tap application of branded presets (colour grading, LUTs, transitions, simple text overlays).
• Live preview with scrubber; slider to fine-tune each preset’s strength.
• Export in 720p, 1080p and, when the device allows, 4K H.264/H.265.
• Share sheet integration for Instagram, TikTok, YouTube and direct save to gallery.

Technical expectations
I am open to native Swift + Kotlin, Flutter, or React Native—choose whichever lets you keep performance smooth during real-time preview. Please keep the architecture modular so new presets can be added just by dropping files or JSON definitions into a folder. Any video processing libraries you prefer (e.g., FFmpeg kit, GPUImage, AVFoundation, ExoPlayer) are fine as long as they meet App Store and Play Store policies.

Deliverables
1. Full source code with build instructions for Xcode and Android Studio (or equivalent).
2. A signed iOS TestFlight build and an Android APK/AAB for testing.
3. At least five sample presets demonstrating colour, transition and text options.
4. Brief README covering how to create additional presets.

Acceptance criteria
• Preset application must complete in under 2 seconds for a 30-second 1080p clip on mid-range devices.
• Exported files play back without audio-video desync.
• Code passes a clean build on fresh machines following the README.

Let me know which framework you prefer and any questions about the preset format; once we agree on the tech stack I’ll supply the graphics and LUT files.