SlimByte vs BatchOptimize
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SlimByte
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Your videos eat your phone storage. SlimByte gives it back. The Apple way — simple controls, the right options, nothing in the way. Pick videos, choose target, hit Convert. Typical iPhone recordings drop 70–90% in size with the quality you see kept intact. SMART COMPRESSION • Reduce 4K to 1080p, 720p, or any preset — or let Auto-Optimize pick per video • HEVC, H.264, MP4, MOV — work with what your library already uses • Custom bitrate control for finer-grained quality vs. size • Adjust frame rate independently (60fps → 30fps saves real space) • HDR → SDR conversion for sharing-friendly compatibility • Batch convert dozens of videos in one queue BUILT FOR iOS • Native iOS 26 design — Liquid Glass throughout • Background conversion that survives device lock — start a batch, lock your phone, come back to finished files • Live Activity on the Lock Screen tracks per-video progress • Saved files keep original creation date, modification date, and location metadata — they sit naturally next to originals in your Photos library • Works on iPhone and iPad GALLERY + LIBRARY TOOLS • Browse and filter your videos by resolution, HDR/SDR, or date • Preview before you convert • Detailed info per video — resolution, duration, file size, codec PRIVATE BY DESIGN • Runs entirely on your phone — nothing uploaded, no servers, no cloud • No analytics, no tracking, no ads, no accounts • No watermarks on free or paid output — ever • Apple's privacy nutrition label confirms minimal data collection FREE TIER • 10 conversions every month — refreshed automatically • Every feature except Auto-Optimize included • Full interface, batch processing, all formats, all quality controls • No ads, no watermarks, no upsell popups during conversion PREMIUM • Unlimited conversions • Auto-Optimize — SlimByte picks the right settings per video so you don't have to • 1 week — $1.99 • 1 month — $2.99 • 1 year — $34.99 (works out to $2.92/month) SUPPORT Questions? Tap Settings → Help & Support. We read every message. Terms of Use: https://slimbyte.app/terms Privacy Policy: https://slimbyte.app/privacy
BatchOptimize
This app offers high-performance media and document compression for Apple devices. It can reduce file sizes by up to 90% while preserving quality, supporting various image, video, PDF, and audio formats. Automation features allow for quick processing and integration with other applications.
- Compress images, videos, and PDFs
- Convert between multiple formats (WebP, AVIF, HEIC, MP4, MOV, GIF, PDF)
- Resize images and videos
- Add text watermarks
- Extract audio from videos
- Automate tasks with Apple Shortcuts
- Merge images into PDFs
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BatchOptimize is the ultimate high-performance media and document compression powerhouse engineered exclusively for macOS, iOS, and iPadOS. Built from the ground up for Apple Silicon with Metal, VideoToolbox, and CoreGraphics hardware acceleration, BatchOptimize lets you crush massive file sizes by up to 90% while preserving crisp pixel fidelity. KEY CAPABILITIES: • IMAGES & GRAPHICS: • Next-Gen Formats: Convert & compress to WebP, AVIF, HEIC, JPEG, PNG, and TIFF. • Text Watermarking: Add customizable copyright overlays with position and opacity controls. • Vector Minification: Clean and strip redundant SVG code tables and metadata. • Smart Scaling: Resize to exact bounding boxes or percentage steps. • Lossless Master: 100% bit-perfect stream cleanup with zero pixel degradation. • VIDEOS & CLIPS: • Multi-Codec: Transcode between MP4 (H.264 & HEVC/H.265), Apple ProRes MOV, WebM, and GIF. • Animated GIF & WebP: Convert video clips into smooth looping animations for Discord and web. • Audio Extraction: Demux soundtracks directly to standalone MP3, M4A, FLAC, or WAV. • Target Size Caps: Constrain video exports to strict limits (Under 25 MB Discord, Under 10 MB WhatsApp). • Fast Web Start: Place MP4 MOOV atom at start for instant online streaming. • Audio Muting: Strip unwanted audio tracks to reduce clip sizes. • PDF DOCUMENTS: • Resolution Downsampling: Choose between 72 DPI (Web), 150 DPI (Email), or 300 DPI (Print). • Merge Images to PDF: Combine photos, receipts, or scans into a single compressed PDF booklet. • Page Rotation & Alignment: Rotate pages (90° CW, 180°, 90° CCW) or auto-align (Force Portrait/Landscape). • Image Compression Levels: Choose High Quality (85%), Compact (65%), Max (45%), or Lossless (100%). • Watermark Stamps: Apply copyright and security stamps across 5 positions. • Fast Web View: Linearize PDF document structure for instant browser streaming. • Privacy Sanitization: Strip author names, editing software, and hardware serials. • AUDIO TRACKS: • Multi-Format Transcoder: Reduce bitrates for MP3 (LAME Engine), M4A (AAC with Cover Art), FLAC, and WAV. • Loudness Normalization: Standardize volume to Podcast Speech (-16 LUFS) or Music (-14 LUFS). • Smooth Fades: Apply 1s to 5s volume fade-in and fade-out to prevent clicks. • Pitch-Preserved Speed: Change playback speed (0.8x to 2.0x) with zero pitch distortion. • Channel Mixing: Convert stereo audio to mono for an instant 50% size reduction. • PRODUCTION & AUTOMATION: • Apple Shortcuts & Siri: Native AppIntents to automate bulk optimization, format conversion, and image-to-PDF merging via voice or Finder Quick Actions. • Direct Drag-Out: Drag completed files directly into Finder, Slack, Discord, Mail, Figma, or Photoshop. • Clipboard Quick Optimizer (Cmd+Shift+V): Instant 1-click import and compression for copied screenshots. • Visual Diff & Loupe: Inspect before-and-after image and PDF results side-by-side at 120 FPS. • CSV Summary Reports: Export detailed spreadsheets with byte savings and compression ratios for Excel & Numbers. • 72 Tailored Presets & iCloud Sync: One-click optimization for Shopify, Instagram, Discord, Email, and Podcasts. Custom presets sync automatically across your Mac, iPhone, and iPad via iCloud. • 100% Offline & Private: No cloud uploads, no server delays, and zero data collection.
Screenshots
Verdict
The clearest difference is update cadence: BatchOptimize at every 2 weeks against SlimByte's every 5 months. On price, ads, 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. SlimByte sells 3 in-app purchases, starting at $1.99 per 7 days and BatchOptimize sells 6 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
SlimByte ships an update every 5 months, BatchOptimize every 2 weeks. Both last shipped on October 5, 2026.
| Parameter | SlimByte | BatchOptimize |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 5 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, Mac — better |
| Requires iOS | 17.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 15 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Aleksandar Golubovic | Lei Feng |
In-app purchases
SlimByte
- Weekly Premium$1.997 Days
- Monthly Premium7 Days trial$2.991 Month
- Annual Premium14 Days trial$29.991 Year
BatchOptimize
- All Features Upgrade Promo 50% OFF$4.99
- Images & WebP Pack$4.99
- PDF & Documents Pack$4.99
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- Video Optimizer Pack$4.99
- Audio Transcoder Pack$4.99
- All Features Bundle (50% Off)$9.99









