New User
Just tried this App for the first time and liking it very much! Has lots of information to get you started and understanding Haiku. A great way to help you express your feelings.
Free
In-App Purchases
About
Compose and journal haiku poetry with intelligent syllable counting and multiple composition styles. Find inspiration from masters and AI-generated verses, then share your creations with beautiful custom backgrounds.
✓Intelligent syllable counting
✓Five composition styles
✓AI-generated haiku inspiration
✓Personal haiku journal
✓Shareable haiku images
✓Stationery collection
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What's New in 17on
2.0.1
July 6, 2026
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
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In-App Purchases
$4.99
Premium Unlock
Unlock unlimited haikus & additional composition styles
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FAQ
What is 17on?
17on is a haiku composition and journaling app designed to help users express themselves through poetry. It offers intelligent syllable counting, multiple composition styles, and tools for sharing creations.
Does 17on have ads?
No, 17on is ad-free. The app offers a free version with core features and an optional one-time premium purchase for unlimited access and all composition styles.
How does the syllable counting work in 17on?
17on uses a dictionary-based approach with over 126,000 English words from the CMU Pronouncing Dictionary for accurate syllable counts. It provides real-time feedback as you write.
What composition styles are available in 17on?
17on offers Traditional (5-7-5), Modern (4-4-6), Lune (5-3-5), Monoku (one line), and Freeform (no rules) composition styles. The free version includes Traditional and Modern formats.
Can I get inspiration for my haiku in 17on?
Yes, 17on features an inspiration feed with haiku from masters and on-device AI that generates original haiku using seasonal themes. This AI processing is done privately on your device.
How can I share my haiku from 17on?
You can transform your haiku into shareable images in 17on by choosing from various stationery backgrounds, customizing fonts, and selecting ink colors. These can be shared to platforms like Instagram and Messages.
What is the premium version of 17on?
The premium version of 17on is a one-time purchase that unlocks unlimited haiku composition, all five composition styles, and complete creative freedom. The free version offers limited haiku and specific formats.
How often is 17on updated?
The latest version of 17on is 1.0.4, last updated on March 29, 2026. The app was initially released on February 10, 2026.