# Nenrin — Pen & Ink Collection — Your pens and inks, kept well

> Your pens and inks, kept well (iPhone/iPad app by Brivio Advisory OÜ.)

- Source: https://appshunter.io/ios/app/nenrin-pen-and-ink-collection/id6792317625 (this page in markdown: same URL + `.md`)
- Developer: [Brivio Advisory OÜ](https://appshunter.io/developer/1883334400)
- Category: Lifestyle, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 10 MB
- Languages: American English
- Released: 2026-09-09
- Data updated: 2026-09-12
- User reviews in markdown: https://appshunter.io/ios/app/nenrin-pen-and-ink-collection/id6792317625/reviews.md

## What is Nenrin?

Nenrin (年輪 — "tree rings") is a home for your fountain pen and ink collection. Not a database. A place.

BRING YOUR COLLECTION WITH YOU
Already keeping your pens in another app or a spreadsheet? Nenrin reads your CSV export and your collection walks in with you — pens, inks, details intact. Import is free for everyone, at every tier, always. Nothing held back, nothing behind a door.

THE COLLECTION, BEAUTIFULLY KEPT
Add a pen in four taps — a deep catalogue of brands, models and colorways meets you as you type, and anything it doesn't know you can always write by hand. Photos framed the way you choose, nib and filling system at a glance, and room for the story — where it came from, what day it was. The things a spreadsheet forgets.

INKS THAT LIVE
Your bottles stand on a shelf — many in their brand's own shape — and behave like bottles: the ink leans when your phone tilts, sloshes when you tap, settles its shimmer while you're away. Fill levels move a real waterline. Sheen and shimmer are captured as colors, not checkboxes.

THE ROTATION
Ink a pen — from the bottle, a converter, or a cartridge — and it enters the rotation. See what's inked with what and for how long, mark a pen for cleaning, and let a quiet reminder tell you when a fill has sat too long.

GRAILS
The pens you're hunting. A target, what you've set aside, and the notes — where you spotted it, what the nib should be. When the day comes, one tap converts the grail into an owned pen with its story intact.

THE PALETTE
One tap composes your collection into a card — your pens as a quiet palette, light or dark — made for the communities you're already part of.

YOURS, QUIETLY
- Syncs through your own iCloud. No accounts, no feed, no AI.
- No analytics, no ads, no tracking. We can't see your pens.
- Export everything as JSON and CSV, free forever. Your data is yours.

Free for up to three pens and three inks — everything included, import included. Nenrin Pro is a single purchase (no subscription, ever): unlimited pens and inks, alternate app icons, and shares without the small mark.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Nenrin Pro | $20.00 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-09-10

No release notes.

## More apps by Brivio Advisory OÜ

- [Arkive: Time Capsules](https://appshunter.io/ios/app/arkive-time-capsules/id6769161204)

All apps by Brivio Advisory OÜ: https://appshunter.io/developer/1883334400

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-12.*