FrameSlim vs PDF Compressor
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FrameSlim
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Video Compressor & Converter is a privacy-first, professional toolbox for iPhone and iPad. Compress, convert, edit, and transcribe your media without cloud uploads, user accounts, or watermarks. [ 1. SIZE & COMPRESSION ] • Smart Extreme Compression: Automatically balances quality and size, saving 60%+ storage with visually lossless results. • Target Size Limit: Shrink files strictly under 25MB for seamless sharing via email, Messages, and social apps. • Pro Custom Controls: Customize resolution (4K, 2K, 1080P, 720P), frame rate (24, 30, 60fps), and bitrate. • 3 Rate Control Modes: CRF (Constant Quality), CBR (Constant Bitrate), and VBR (Variable 2-Pass Mode). • Color & HDR Conversion: Keep 10-bit Dolby/HLG HDR or convert intelligently to Rec.709 SDR to prevent dull colors. [ 2. EDIT & TRIM ] • Millisecond Keyframe Trim: Drag with precision to eliminate unwanted footage at the start and end. • Equal Duration Split: Batch slice videos into equal parts by seconds or segment count. • Seamless Multi-Video Merge: Combine multiple clips into one continuous high-definition video. [ 3. CROP, CANVAS & GEOMETRY ] • Social Aspect Ratios: Adaptive cropping for 16:9, 9:16, 1:1, and 4:3 social formats. • Geometry Correction: 90° clockwise rotation, horizontal mirror, and vertical flip. • Video Enhancement: Brightness, contrast fine-tuning, and sharpening noise reduction. [ 4. SPEED ADJUSTMENT ] • 0.25x slow motion to 4.0x hyper-speed forward, with one-tap 1.0x reset. • Creative speed presets: Smooth deceleration, progressive acceleration, bullet time, hero moment, and montage. [ 5. AUDIO & SUBTITLES ] • Master Audio Extraction: One-tap lossless export to MP3 or M4A (64k to 320kbps). • Replace Audio Track: Strip noisy original sound and mix in your custom background music. • Complete Muting: Completely strip all audio tracks to safeguard on-site privacy. • Offline AI Subtitles: Generate SRT subtitles on-device using Apple's Neural Engine with zero data uploaded. [ 6. EXPORT & CREATION ] • High-Quality GIF Maker: Turn highlights into lightweight animated GIFs. • 4K Frame Extraction: Find the perfect frame and export pristine 4K original photos to your Photos app. • Hardware Multi-Format Conversion: MP4, MOV, ProRes, and WebM high-speed transcoding. [ PRIVACY FIRST ] • 100% On-Device Processing: All encoding, decoding, and speech recognition run locally. • No account required, zero tracking, and no ads. • Complete control over saving to Photos, Files, or sharing via AirDrop. (Note: Available codecs and hardware encoding speeds depend on your device chipset and iOS version.)
PDF Compressor
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PDF Compressor helps you reduce PDF file size for sharing, uploading, and keeping smaller copies of your documents. Select a PDF, choose a compression level, and check the result before saving or sharing it. Choose your compression level Pick Better Quality, Balanced, or Smaller File to prioritize visual quality or a smaller output. The amount of reduction depends on the original document. Check the result Preview your compressed PDF and see its file size, page count, and percentage reduction. Your original PDF stays unchanged, so you can review the compressed copy before using it. Save, share, and find it again Save the result to Files or send it through the share sheet. Saved results remain available in History for previewing, sharing, renaming, or deleting later. Process your PDFs locally Compression runs locally without uploading your documents to a processing server. No account is required, and the app contains no advertising, in-app purchases, or subscriptions. Before you compress Compression converts each page into an image within the output PDF. Visual quality may decrease, and text in the compressed copy will no longer be selectable or searchable. Some PDFs may not become smaller, and a specific output size is not guaranteed. Privacy Policy: https://alderpathstudio.github.io/PDF-Compressor/privacy-policy.html Terms of Use: https://alderpathstudio.github.io/PDF-Compressor/term-of-use.html
Screenshots
Verdict
The clearest difference is ads: FrameSlim at none against PDF Compressor's shown. FrameSlim also leads on iOS requirement (15.6 vs 17.0). On price, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | FrameSlim | PDF Compressor |
|---|---|---|
| Price | Free | Free |
| Update frequency | Monthly | — |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 36 MB | 3 MB |
| Age rating | 17+ | 4+ |
| Developer | 姣萍 黄 | Jeny Goentoro |
In-app purchases
FrameSlim
No in-app purchases
PDF Compressor
No in-app purchases









