# Filter Studio: Photo FX — Pro Photo Editing Tools

> Pro Photo Editing Tools (iPhone/iPad app by 应龙 张.)

- Source: https://appshunter.io/ios/app/filter-studio-photo-fx/id6770474060 (this page in markdown: same URL + `.md`)
- Developer: [应龙 张](https://appshunter.io/developer/1514562080)
- Category: Graphics & Design
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: American English, Chinese (Simplified, China)
- Released: 2026-05-20
- Data updated: 2026-06-28
- User reviews in markdown: https://appshunter.io/ios/app/filter-studio-photo-fx/id6770474060/reviews.md

## What is Filter Studio?

FilterStudio is a professional, on-device photo editor engineered for speed, control and privacy. Built on Apple Core Image and PencilKit, it delivers studio-grade output without a server round trip and without a single subscription prompt.

ENGINE
• 15 hand-tuned filters mapped to native CIFilter primitives — Mono, Noir, Fade, Chrome, Process, Transfer, Instant, Sepia, Vivid, Dramatic, Silvertone, Posterize, Bloom, Vignette, Original.
• Real-time GPU pipeline — every slider rebuilds the preview at native resolution.
• Lossless export — output written back to Photos at the full input pixel size, no recompression artifacts beyond standard PNG/JPEG.

ADJUSTMENTS
• Brightness — linear exposure offset.
• Contrast — perceptual contrast curve.
• Saturation — chroma scaling, clamped against banding.
• Live preview, no commit step.

LAYER SYSTEM
• Text layer — UTF-8, dynamic font sizing, color and bold control, free positioning.
• Sticker layer — vector-style emoji and shapes, scale and rotate.
• Drawing layer — Apple Pencil first, finger fallback, multi-color.
• Layers composited at export time, original photo never overwritten in place.

WORKFLOW
1. Pick a photo via the system PhotosUI picker.
2. Apply filter, adjust, add text/stickers, doodle.
3. Crop and rotate if needed.
4. Tap Save — written to Photos with library write authorization only.

PRIVACY & SECURITY
• Strict on-device processing. No analytics, no telemetry, no third-party SDKs.
• Photos library access is request-once, write-only by default.
• No user account, no email collection, no IDFA usage.

LOCALIZATION
English and Simplified Chinese, switchable from in-app settings.

REQUIREMENTS
iOS 17.0 or later. iPhone only.

PRICING
Free. No tier, no consumable, no in-app purchase.

FilterStudio is for users who want professional control without subscription friction. Install once, edit forever.


## Version history (last 1 release)

### 1.0 — 2026-05-21

No release notes.

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All apps by 应龙 张: https://appshunter.io/developer/1514562080

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-28.*