| What it does | Collaborative poetry game where every line is written by a human, never AI
| A hard sci-fi idle game evolving from the Big Bang to an interstellar civilization
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| Stage | MVP
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| Founded | Not given
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| Based in | Not given
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| Pricing model | Freemium
| Freemium
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| Pricing | Free to play. Optional in-app purchases for boosted or unlimited energy. Paid 24-hour Rhyma Boost includes one permanent private-Circle ownership slot and one permanent public-Circle ownership slot.
| Free with no ads; optional Supporter: $2.99/mo, $19.99/yr, or $29.99 lifetime; time crystal packs: $1.99 (Skip a night), $4.99 (Skip a wall), $9.99 (Skip a week)
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| Key features | - Write one line of poetry at a time with 3 minutes per turn
- See only the previous line, not the full poem history
- Lines are 5 to 66 characters long
- Poems are 4, 8, 12, or 16 lines long
- Journey map showing every city the poem traveled through
- Earn achievement pins for milestones and accomplishments
- Create private or public Circles for group writing with friends and colleagues
- No AI-generated content, every line written by humans
- See author names and poem history when poem completes
| - 13.8 billion year cosmic timeline from Big Bang to interstellar civilization
- 118 sourced research cards with scientific citations
- 12 game eras spanning Cosmos, Life and Civilization
- 16 different endings
- 12 civilization channels inspired by science fiction and real concepts
- Playable on phone, desktop and iPad with cloud save sync
- Installable on phone home screen for offline play
- No ads and completely free to play
- 1,400+ nodes each grounded in real science with sources
- Physics-accurate simulation where 1 light-year equals 1 real hour
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| What makes it different | - Human-only poetry creation with no AI or bots involved
- Collaborative gameplay with strangers across countries in real-time
- Surprise element where you cannot see previous lines until poem completion
- No algorithms, no feeds, no gamification metrics like likes or ratios
- Poem travel maps and achievement badges for player progression
| - Every scientific claim cites real sources with year, researcher and publication
- Hard sci-fi design where physics and signal times follow real scientific laws
- Completely free with no ads, payment optional and never pay-to-win
- Invented game lore clearly separated and labeled apart from real science basis
- Curated collection of 24+ open-source astronomy, physics and biology projects
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| Free plan | Not given
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| Open source | Not given
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| Platforms | Not given
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| Public API | Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 24 ● no change since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 4 | 0 |
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| Citation Flow (Majestic) | 27 | 15 |
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| Referring domains (Majestic) | 22 | 2 |
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RHYMA
Cosmos Era