Paint Play vs SignalProof

PaintPlay combines drawing, animation and short-video creation on iPhone and iPad. Sketch with Apple Pencil or touch, organize your artwork in layers, and bring your drawings to life. DRAW AND ORGANIZE Use native PencilKit brushes, erasers, colors, image layers, a ruler, a protractor and canvas guides. Arrange layers and adjust their visibility and opacity. Available brushes depend on your system version. FOUR WAYS TO ANIMATE Writing: reveal strokes over time. Motion: arrange positions, rotations and scales with keyframes. Physics: create falls, bounces and swings in a shared environment. Frame by frame: draw changing poses with onion skin and adjustable frame timing. EDIT THE TIMELINE Combine animation across layers. Move, trim and split clips, refine motion keyframes, select a playback range, and preview the whole work. KEEP AND SHARE Save editable projects, open compatible .pskt and .bskt documents, and export PNG images, animated GIFs or MP4 videos. Some Windows-specific tools and effects may differ on iPhone and iPad. PRACTICE YOUR DRAWING Warm-up drawing exercises remain available for practicing stroke control and building confidence. FREE ACCESS AND VIP Free features include PencilKit drawing, erasers, pan, basic colors, up to two layers, Writing and frame-by-frame animation. Existing artwork can still be opened, played and exported at standard resolution, up to 1280 pixels on the longest edge. The first five app launches include full-access app trial sessions. This is not a paid subscription trial and does not charge automatically. VIP adds motion and physics animation editing, selection and transforms, stroke editing, shapes, more layers, extended color tools and high-resolution export, including 1920 and 3840 pixel presets. Monthly and yearly subscriptions provide the same VIP features. Subscriptions renew automatically unless cancelled in App Store account settings. Prices and billing periods are shown before purchase. Restore purchases from the VIP screen using the same Apple Account. Requires iOS 18 or iPadOS 18 or later. Privacy policy: https://yu-weiz.github.io/www/SketchingTech_Privacy-Policy Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

SignalProof is a tone generator for repeatable speaker, room, headphone, and sound meter checks. Generate controlled signals, follow practical workflows, and save the setup so you can run the same check again. Use it when random music, videos, and undocumented tone tools make results difficult to compare. WHAT YOU CAN GENERATE - 1 kHz and custom sine tones - Pink, white, and brown noise - Linear and logarithmic frequency sweeps - Left, right, or stereo output - Conservative dBFS level control - Timed or continuous playback BUILT FOR PRACTICAL AUDIO CHECKS SignalProof helps you: - Compare speaker channels with pink noise - Run quick sound meter sanity checks - Find room resonances with sweeps - Repeat window, door, and isolation checks - Save test-session notes and reference readings - Export a local PDF report for follow-up LOCAL-FIRST BY DESIGN Your sessions, notes, presets, and reports stay on your device. SignalProof requires no account and includes no ads, analytics SDK, cloud sync, or AI service. FREE CORE, OPTIONAL LIFETIME PRO SignalProof is free to download. The free experience includes the core tone, noise, and sweep generator, starter workflows, local test sessions, basic sharing, and one custom preset. An optional one-time, non-consumable SignalProof Pro purchase unlocks four advanced guided workflows, burst and intermittent playback patterns with configurable timing, and unlimited custom presets. SignalProof Pro is a lifetime unlock, not a subscription. The purchase price is shown in the app using your App Store storefront. SAFETY AND LIMITS SignalProof generates digital audio signals. It does not guarantee a specific acoustic dBSPL output from an iPhone speaker, Bluetooth speaker, or external system. Actual sound pressure depends on device volume, speaker hardware, distance, room conditions, and measurement setup. It is not a certified sound calibrator, medical hearing test, or lab-grade acoustic measurement tool. Start with low volume, raise levels gradually, and protect your hearing.