17on: A Haiku Poetry Journal

Your personal haiku journal.

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

Capture life in three lines. 17on (pronounced "seventeen-on") is a haiku composition and journaling app: a quiet space to write in the traditional 5-7-5 form or contemporary variations. A built-in syllable counter lets you focus on the words, not the count. A QUIET SPACE FOR DAILY HAIKU No social feed. No algorithm. No pressure. Just you, your words, and the form that has shaped poets for centuries. Whether you keep a daily haiku practice, capture a single observation, or write your first 5-7-5, 17on stays out of the way. INTELLIGENT SYLLABLE COUNTING A real-time 5-7-5 syllable counter, line by line. No more counting on your fingers. 17on uses a dictionary-based approach backed by over 126,000 English words from the CMU Pronouncing Dictionary, plus hidden language data from the EDRDG dictionary. COMPOSITION STYLES Choose the form that fits the moment. Traditional (5-7-5). Where it all begins. Modern (4-4-6). Say more with less. Lune (5-3-5). Distilled to essence. Monoku. One line, one moment. Freeform. No rules, pure expression. ...and more. INSPIRATION WHEN YOU NEED IT Swipe through an inspiration feed of timeless haiku from masters including Bashō, Issa, Buson, and Shiki. When enabled, on-device AI generates original haiku using seasonal kigo (季語), processed privately on your phone and never uploaded to the cloud. YOUR PERSONAL HAIKU JOURNAL Every haiku you write is saved to your journal, stored locally on your device. Search by keyword, hashtag, date, or composition style. Revisit any moment you have written down. Optional backup to Google Drive, only if you choose. BEAUTIFUL TO SHARE Turn any haiku into a shareable image. Choose from a collection of stationery backgrounds, pick a pen style, and select an ink color to match the mood. Share to Instagram, Messages, or anywhere else inspiration belongs. COLLECT STATIONERY Earn Pages by composing, sharing, and exploring the inspiration feed. Trade them at the gacha machine for new papers, pens, and inks. From everyday finds to rare treasures, build a writing kit that feels uniquely yours. DESIGNED FOR DELIGHT A subtle haptic on each completed line. A gentle animation when a haiku is complete. Small details that make the practice feel as intentional as the poetry. FREE (AD SUPPORTED) - 31 haiku across Traditional and Modern formats - Full journal and search - Share your creations, styled your way - Stationery gacha for paper, pen, and ink - Inspiration feed with famous haiku - On-device AI haiku (where supported) PREMIUM (ONE-TIME PURCHASE) - Unlimited haiku - All composition styles - Watermark removal - Complete creative freedom WHY 17ON In a world of endless scrolling, 17on offers something different: a calm, distraction-free space for brief, meaningful expression. No social feeds. No algorithmic pressure. Just you, your words, and the timeless Japanese poetry form that has inspired writers for centuries. Begin your haiku practice today. 17on is made by IROIRO, LLC. Syllable data courtesy of Carnegie Mellon University. Japanese dictionary data from the Electronic Dictionary Research and Development Group (CC BY-SA). Famous haiku courtesy of the Haiku Society of America. Your haiku are yours alone. AI features use a stock on-device model with no training on user content.

Ratings & Reviews

  • 5.0
    out of 5
    5 Ratings

A few gentle refinements for your daily practice. What's New in 2.0.1: • Missed a day? Bridge the lapse with Pages and bring your streak back to your best, all in one step. • A new meter shows how close your next stationery pull is to a guaranteed new item. • Your daily Pages bonus is now steady and dependable. • Set your companion's sanctuary to the real-world season or its own. • Smoother share editing: tap outside any element to deselect. Thank you for writing with us. -17on

Version 2.0.1

The developer, IROIRO LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Identifiers
    • Usage Data

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Identifiers
    • Usage Data

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • IROIRO LLC
Size
  • 257.6 MB
Category
  • Lifestyle
Compatibility
Requires iOS 17.0 or later.
  • iPhone
    Requires iOS 17.0 or later.
  • Mac
    Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
  • English
Age Rating
4+
In-App Purchases
Yes
Copyright
  • ©2018 IROIRO, LLC
  • Developer Website
  • Privacy Policy

    • More by IROIRO LLC

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