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RepostGrid vs Undertone

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

RepostGrid compared with Undertone
DetailRepostGrid logo RepostGridUndertone logo Undertone
What it doesFree TikTok banner splitter that cuts one image into three profile tiles See why colors work
StageNot given Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelFree Freemium
PricingNot given Free: Original view, Temperature map, Value structure, Saturation map, Palette and Harmony for every image, 20 analyses at a time. Lifetime Premium: one-time purchase includes Composition guides, Contrast map, tinted value bands, unlimited history, full-res export. No subscription.
Key features
  • Splits images into 3 numbered tiles with posting order
  • Preview tiles on TikTok profile layout before posting
  • Creates 3×3 grids for TikTok and Instagram
  • Carousel splitter for swipeable slides
  • Full-screen tiles option for 9:16 posts
  • Custom grid with any rows, columns and tile shape
  • Shows TikTok safe zones and label placement
  • Add text with font, size, position and color options
  • Supports HEIC, PNG, JPG and WebP formats
  • Download tiles as ZIP file or one by one
  • Palette with proportions showing dominant colors sized by image weight
  • Color harmony identification (Complementary, Analogous, Triadic, Split-complementary, Tetradic, Square, Monochromatic)
  • Temperature map showing warm and cool distribution across image
  • Value structure divided into clear zones (light, mid-tone, dark)
  • Saturation map showing vivid and muted areas
  • Composition guides identifying classic guides like golden ratio and rule of thirds
  • Contrast map showing where the eye lands first (Premium)
  • Painter-friendly color names (Yellow Ochre, Payne's Gray, etc.)
  • Local device processing with no image uploads
  • Works offline with no account required
What makes it different
  • No image upload: processing runs entirely in your browser
  • No sign-up, watermark, or limits on banner creation
  • Labels tiles with correct posting order for TikTok
  • Works on phone and desktop with same functionality
  • Gallery of ready-made repost walls to download or repost
  • Shows color proportions, not just colors, recognizing that a 60/5 split is fundamentally different from 50/50
  • Four layers of analysis together show relationships single layers cannot reveal
  • Built by people who actually mix paint with painter-friendly vocabulary
  • Lifetime Premium with single payment, no subscription model
  • All data stays on device, no account signup required
Community votes00
DR (Domain Rating by Ahrefs)2 no change since last check8 +1 (up) since last check
Trust Flow (Majestic)44
Citation Flow (Majestic)2732
Referring domains (Majestic)3431

4 details filled in for both companies.

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