Parallely vs FormSync

Put two photos or videos side by side and see the difference instantly. Pay once and it's yours: no subscriptions, no ads and no account. Parallely makes it easy to compare your golf swing with a pro's, show a before and after, or build a reaction video in seconds. Trim each video to the moment that matters, then watch both sides play in sync, frame by frame or in slow motion. What You Can Do: • Compare in Sync: Trim each video to its key moment and both sides play together. • Review Every Frame: Play, pause, scrub, step one frame at a time, and slow down to 0.5x or 0.25x. • Combine Media: Place 2 photos, 2 videos, or one of each, side by side or stacked. • Customize: Zoom and pan, adjust borders, add your logo, and set volume and playback order. • Share Anywhere: Export in 1:1, 4:5, 9:16 or 16:9 and post to social media, Messages, email and more. Great For: • Coaches and athletes reviewing swings, form and technique • Fitness and transformation progress • Before and afters for home, beauty and design projects • Creators making reaction and comparison videos Why Parallely? • Pay Once, Own It: No subscriptions, no trials and no upsells. • No Ads. Ever. • Private: No account needed, and your photos and videos stay on your device. • Fast and Lightweight: Built for speed, not clutter. Have a question or an idea? Reach out to support@gintechsystems.com and we'll get back to you.

FormSync lets you place two videos side by side and play them together — a simple app for checking form. Compare any kind of movement: dance, golf, tennis, baseball, training, and more. Put a reference next to yourself, or your past form next to today's, and spot the differences at a glance. Features - Pick two videos from your camera roll and view them side by side - Play and pause both videos at the same time - A shared seek bar to move both to the same position - Slow-motion playback (0.25x / 0.5x / 0.75x / 1x) - Set a start point for each video and fine-tune it in 0.05s steps - Jump to start / skip forward 10s / back 10s - Pinch to zoom in and check the fine details up close (zoom is kept in your exports too) - Landscape mode on the compare screen - Swap one video and keep the other — compare new takes against your reference, one after another - Mirror view — flip either video horizontally to match your reference's direction - Draw straight lines to compare form — angle and alignment (PRO) - Auto-detect pose — full-body skeleton and spine angle drawn in one tap (PRO) - Export your comparison as a single video, landscape or vertical 9:16 (saved to your camera roll, ready to share) - Set an end point and export just the range you want to show - Save your comparisons to history, name them, and revisit them Free - Compare any videos — preview plays 10 seconds from your chosen start points - Export comparisons up to 10 seconds (with a small watermark) - Keep your 5 most recent comparisons in history PRO (one-time purchase) - Play and compare videos in full length - Draw straight lines to compare form — angle and alignment, baked into your exports too - Auto-detect pose — full-body skeleton plus spine angle for your golf swing, in one tap - Export full-length comparisons (watermark can be turned off) - Keep unlimited history All videos are processed on your device and are never uploaded to a server. For iPhone.