Slate vs ML Data Factory
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Slate
This app combines note-taking with a freeform drawing canvas. Easily add text, sketches, equations, and more using simple commands. Enjoy a distraction-free, dark design optimized for Apple Pencil.
- Text, headings, lists
- Tables and charts
- Math equations (LaTeX)
- Images, audio, files
- Freeform canvas
- Apple Pencil support
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Notes and canvas, beautifully combined. Slate is where writing meets drawing. Capture ideas in text, sketch them on canvas, or do both — all in one minimal app. POWERFUL BLOCKS Add anything with a simple "/" command: - Text, headings, lists - Tables and charts - Math equations (LaTeX) - Images, audio, files - Freeform canvas INFINITE CANVAS Draw without limits. Pen, pencil, brush, shapes, colors — everything you need to visualize your thoughts. DARK & MINIMAL Pure black design. Zero distractions. Just you and your ideas. APPLE PENCIL READY Pressure sensitivity. Palm rejection. Natural drawing experience. Think. Write. Draw. All in Slate.
ML Data Factory
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ML Data Factory is a professional-grade mobile utility engineered to bridge the gap between raw video footage and the high-quality datasets required for machine learning. Designed for data engineers, sports analysts, and AI researchers, this app allows you to curate, manufacture, and package machine learning datasets entirely from your iPhone or iPad. Stop wasting time with bulky desktop software. Whether you are in the field or at your desk, ML Data Factory provides a streamlined, high-throughput pipeline to transform raw video into structured, AI-ready training data. Key Features: Precision Data Pipeline: Seamlessly ingest raw video from iCloud, the local Files app, or your Photo Library. Support for bulk-uploading allows you to queue multiple videos for efficient, uninterrupted processing. Direct-Link Ingestion: Paste direct video URLs to stream and download high-quality footage directly into your processing queue. Frame-Accurate Scrubbing: Utilize high-precision seeking controls to pinpoint the exact millisecond of an action. Whether you are analyzing a sports swing or a manufacturing process, you have full control with frame-by-frame navigation. ML-Ready Visual Guides: Built-in 224x224 crop guides ensure your visual subjects are perfectly framed for popular machine learning models (e.g., ResNet, MobileNet), ensuring data consistency before you ever snap a frame. Dynamic Dataset Labeling: Create, manage, and toggle custom categories on the fly. Organize your dataset into structured folders that match your specific training labels. Customizable Capture Length: Adjust your capture window dynamically—choose between 30, 60, 90, 120, or 150 frames to match the specific needs of your ML model's temporal requirements. One-Tap Manifest Export: With a single tap, the app compiles your categorized clips into a structured dataset_manifest.json and bundles everything into a single .zip archive. Easily AirDrop or transfer your entire, ready-to-train dataset to your workstation for immediate use in Create ML, PyTorch, or TensorFlow. Technical Specifications: High-Speed I/O: Built on the AVFoundation framework for efficient, asynchronous video processing and extraction. Optimized Performance: Fully compliant with modern iOS 18+ standards for maximum stability and performance on the latest hardware. Data Integrity: All dataset operations are performed using atomic write protocols to ensure no data is corrupted or lost during the extraction and zipping process. User-Centric Design: High-contrast, dark-themed industrial interface designed for high-focus professional environments.
Screenshots
Verdict
Slate and ML Data Factory are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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 | Slate | ML Data Factory |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | — | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 17.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 4 MB | 6 MB |
| Age rating | 4+ | 9+ |
| Developer | Nagarjuna Reddy Bhimavarapu | Kory Fuerstenberg |
In-app purchases
Slate
No in-app purchases
ML Data Factory
No in-app purchases









