InkAtlas

Bottle Runway: fills left per bottle from currently inked pens, using converter/piston/vacuum/eyedropper capacity — not a generic guess.

InkAtlas is the offline companion for fountain pen enthusiasts. Track every pen in your collection, every ink bottle with its swatch color, and the paper you write on — then log how each pen, ink, and paper combination actually performs.

Bottle Runway (New in 2.0.2) See how many fills remain in each bottle from the pens currently inked with that ink. Runway uses that pen’s filling mechanism — converter, piston, vacuum, eyedropper, or cartridge — not a generic 0.9 mL guess. Bottles are ranked Critical, Soon, or Comfortable, and an estimated days-left figure appears when a cleaning cadence is set.

Your pen + ink + paper combinations, ranked Log combos with five-dimension ratings: shading, sheen, dry time, feathering, and bleed. Sort by any dimension to surface your best pairings at a glance. The untested-pair matrix shows which combinations you haven't explored yet.

Mix Lab — Ink Blend Logger Record your custom ink blends with up to 4 source inks and exact parts ratios. InkAtlas computes a weighted color preview from your library swatches so you can identify each blend at a glance. Blend recipes are included in the full CSV export.

Palette — Hue Wheel See your entire ink library arranged by hue angle on an interactive color wheel. Tap any ink dot to inspect its hue, saturation, and brightness values. A color-family grid identifies which hue families you've covered and which are gaps in your collection. Near-duplicate inks — those within 12° of another at similar brightness — are flagged so you can spot overlapping bottles before buying.

Currently Inked rotation Track which pen holds which ink right now. Set a cleaning-interval alert and InkAtlas flags any pen that has been inked past your threshold.

Ink Sample Vault Log vials and ink samples with status (untested, testing, loved, pass) and a star rating.

Notebook tracker Record which paper, pen, and ink you're currently using in each notebook, with a fill-bar showing how much paper remains.

Reference tabs 80+ ink property tags (shading, sheen, shimmer, permanence, behavior) with live canvas demos. Nib width reference from Extra Fine through Music nib with visual stroke previews.

Stats dashboard Rating distribution histogram, dimension averages, brand breakdowns.

CSV export Export your full atlas — pens, inks, paper, combos, samples, wishlist, and blend recipes — as a single CSV file through the iOS share sheet.

Fully offline. No account. No tracking. Everything is stored locally on your device using SwiftData. InkAtlas has no network requests, no analytics SDK, and no account requirement.