PolarGrid vs Kadra
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PolarGrid
Easily add clean borders to photos, create collages, and design flowing carousels. This app processes all images on your device, ensuring privacy and offline functionality. Enhance your photos with various editing tools and export them in high quality.
- Adjustable white or custom photo borders
- Create multi-photo collages
- Design flowing carousels
- On-device photo processing
- Batch photo editing
- Basic photo editing tools
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PolarGrid does what photographers keep needing: a clean border around a photo, several photos laid out into one image, and carousels that flow from one post into the next — in full quality, with nothing uploaded anywhere. WHITE BORDER • Adjustable border, in white or any colour • Aspect ratios: Original, 1:1, 4:5, 5:6, 3:4, 9:16 — vertical or horizontal • Crop to fill, or show the whole photo uncropped • Rotate and flip, drag to reposition, pinch to zoom • Batch mode: set it once, export up to 5 photos together (15 with Pro) • Write a line of text under the photo, in the bottom border (Pro) • Export on a 9:16 background — a colour, or the photo itself, sharp or blurred — ready for Stories and Reels (Pro) EDIT AND RETRO • Edit each photo, free: exposure, contrast, highlights, shadows, whites, blacks, saturation, vibrance, temperature and tint • Colour mix by hue, vignette and sharpness, free • Curves and film grain (Pro) • Healing brush: paint over a small distraction and it’s filled in from around it (Pro) • Retro: eleven original film looks with adjustable intensity (Pro) • Press and hold to compare with the original CAROUSEL • A strip of 2 to 5 posts, with photos running across from one post into the next • Layouts built for the number of photos you pick, or place them freely, with a border or an instant-photo frame • Each post exports as its own photo, ready to upload in order — free • Your photo behind the whole carousel, sharp or blurred (Pro) COLLAGE • 2 to 9 photos in one image • Template grids, including creative layouts • Resize cells by dragging their edges; rotate and flip each photo • Free mode: place, resize and rotate each photo by hand • Control outer border and spacing, square or rounded cells PRIVATE BY DESIGN Every photo is processed on your device. No account, no uploads, no tracking. Works with no internet connection, on iPhone and iPad. POLARGRID PRO Free to use, with no watermark. PolarGrid Pro is a one-time purchase — no subscription — that adds maximum-quality export, unlimited border colours (including any custom colour), curves, film grain, Retro, the Healing brush, text under the photo, the 9:16 background export, your photo behind carousels, and batches of up to 15 photos with one edit synced to all.
Kadra
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Kadra is a fast, private video editor for iPhone. Cut and trim clips, add auto captions, filters, animated titles and music, then export in up to 4K. No watermark, no ads, no account. EDIT ON A REAL TIMELINE • Trim, split, duplicate and rearrange clips on a smooth, zoomable timeline • Layer video, photos, text, stickers and audio on separate tracks • 12 transitions: dissolve, dip to black or white, wipes, pushes and zoom • Crop, mask and flip, and switch the frame between 9:16, 16:9, 1:1, 4:5 and more AUTO CAPTIONS • Turn speech into subtitles in one tap, processed on your iPhone • Works offline, supports many languages, and every line is editable • Import and export SRT and VTT subtitle files FILTERS & EFFECTS • 14 filters with adjustable strength, including Cinema, Golden Hour and Noir • 10 effects: Glow, Dream, VHS, Old Film, RGB Split and more • Fine color controls: exposure, contrast, highlights, shadows, saturation, temperature, tint, sharpness and vignette TEXT & ANIMATION • Ready-made title styles, fonts, outline, shadow and background box • In, out and loop animations, plus keyframes for full control • Emoji stickers SPEED & SLOW MOTION • Constant speed from 0.1x to 8x • Speed ramps: Rise, Glide, Hero, Wave, Rush In and Soft Landing • Reverse clips and add freeze frames AUDIO • Add music from your files, record a voiceover or turn text into speech • Volume, fade in and fade out, and detach audio from video EXPORT • 720p, 1080p, 2K or 4K at 24, 25, 30 or 60 fps • H.264 for compatibility or HEVC for smaller files • Save to Photos or share anywhere PRIVATE BY DESIGN Everything happens on your device. No sign-up, no tracking, no ads and no watermark on your videos.
Screenshots
Verdict
The clearest difference is in-app purchases: Kadra at none against PolarGrid's 1. PolarGrid's advantage is iOS requirement (16.0 vs 18.0). On price, ads 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. PolarGrid sells 1 one-off in-app purchase. Kadra asks for nothing beyond the download.
| Parameter | PolarGrid | Kadra |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Weekly | — |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 16.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 105 MB | 85 MB |
| Age rating | 4+ | 4+ |
| Developer | Frangell Vasquez | yusuf hilal |
In-app purchases
PolarGrid
- PolarGrid Pro$4.99
Kadra
No in-app purchases









