PenKeep: Fountain Pen Care

Keep your fountain pens always ready to write. "I pulled it out and it wouldn't write." "I forgot to flush it for ages." Your pens deserve better — let PenKeep look after their flushing and ink. ■ Flush timing by filling system Cartridge/converter, piston, eyedropper — each holds a different amount of ink and dries at a different rate. PenKeep estimates the flush timing and gently reminds you as it approaches. ■ Spot the ones drying out Ink left unused hardens and stops writing. From the last day used, see "Ready" or "May be drying" — a nudge to write with it or flush it. ■ Your collection, in photos Photograph each pen and the subject is cut out automatically. Your personal collection lined up beautifully. ■ Three-stage flush reminders Ahead of time (2 weeks, a few days) → on the day → and gently every day after until it's done. Never miss a cleaning. ■ Tips for pen lovers From flushing technique and ink compatibility to nib handling and iron-gall ink care — 24 tips and a mascot make caring for your collection more fun. ■ Widget support See pens due for a flush and their status at a glance on your Home Screen. [Free] • Register up to 3 pens • Flush reminders [Premium] • Unlimited pens • Group by pen case or box • Care log (type, ink, notes) • No ads One-time $20 or $1.49/week (no free trial). Subscriptions auto-renew and are billed to your Apple ID unless canceled at least 24 hours before the period ends. Cancel anytime in Settings. Flush cycles are general guides based on the filling system. Adjust to your ink and how often you write. ■ LINKS • Support: https://tsuzukit.com/contact/ • Terms of Service: https://tsuzukit.com/legal/terms-of-service.html • Privacy Policy: https://tsuzukit.com/legal/privacy-policy.html