# PenKeep: Fountain Pen Care

> Flush & ink care reminders

Canonical page: [https://chrome-stats.com/d/id6782400804](https://chrome-stats.com/d/id6782400804)

## Overview

- **ID:** `id6782400804`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Ryo Tsudukihashi
- **Category:** Lifestyle
- **Version:** 1.0
- **Last updated:** 2026-06-25
- **First published:** 2026-06-24
- **Size:** 6.04 MB
- **Data as of:** 2026-09-07
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/penkeep-fountain-pen-care/id6782400804)
- **Website:** [https://tsuzukit.com/](https://tsuzukit.com/)
- **Privacy policy:** [https://tsuzukit.com/legal/privacy-policy.html](https://tsuzukit.com/legal/privacy-policy.html)

## Description

Manage your fountain pens’ flush cycles and ink drying, with photos. Never pull out a pen that won’t write again. Flush timing by filling system, automatically.

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

## Rankings

- #1,349,507 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6782400804)