Polyhedra vs Master RPG AI
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Polyhedra
This app simulates rolling various polyhedral dice with a distinct visual style. It offers the ability to re-roll individual dice or entire sets, making it a versatile tool for tabletop gaming enthusiasts.
- Rolls full polyhedral dice set
- Re-roll individual dice
- Re-roll cups of dice
- Unique visual style
- Works on Apple Watch and iPhone
Read full descriptionHide full description
Polyhedra is a die-rolling app with a unique visual style designed to work well on the Apple Watch - but it looks great on the iPhone too! Polyhedra allows you to roll and re-roll individual dice or cups of several dice. It includes the full polyhedral dice set - d2, d3, d4, d6, d8, d10, d12, d20 and d100. Please get in touch if you'd like to see any other types.
Master RPG AI
Experience tabletop RPG storytelling on your mobile device with an AI Dungeon Master. Engage in pure role-playing with real choices and freedom, exploring handcrafted worlds or creating your own. Your hero evolves with automatic progression and AI-generated visuals.
- AI specialized in RPG storytelling
- Handcrafted lore-rich worlds
- Full custom adventure mode
- Character progression up to level 20
- AI-generated scene illustrations
- 3D dice with real physics
- Free to play with token rewards
Read full descriptionHide full description
Your AI Dungeon Master, always ready. Master RPG AI brings the magic of tabletop RPG to your pocket — pure storytelling, real choices, zero grinding. Your only limitation, is your imagination Master RPG AI is the AI Dungeon Master in your pocket. Not a generic chatbot — a purpose-built AI Game Master specialized in role-playing, designed to deliver the same thrill you felt the first time you opened a gamebook, loaded Zork, or rolled your first d20 with friends around the table. That pure magic of tabletop RPG storytelling, now available anytime, anywhere. PURE ROLE-PLAYING — ZERO GRINDING Forget boring fetch quests and mindless grinding. This is your Dungeon Master AI, old-school at its core: pure storytelling, real choices, total freedom. Every word you type matters. Every decision reshapes the world. HANDCRAFTED WORLDS WITH DEEP LORE Explore richly detailed campaign settings: survive classic '80s horror in The Oak Valley Terror, build a kingdom in Forgottenland, study magic at an arcane academy, fight dragons in a WW2 alternate history, or defend the Elderscale Marches in a cyber-fantasy epic. More worlds coming soon. PLAY ANYTHING YOU IMAGINE 12 classes, 8 races, leveling up to 20 — plus full Custom Adventure mode. Homebrew classes and races fully supported. Write ANY background, ANY setting, ANY universe. Play a vampire lord in 1800s London, a bounty hunter wielding laser swords across distant galaxies, or a political mastermind in a medieval realm. Describe your world during character creation — the AI builds the entire campaign around YOUR vision. YOUR HERO EVOLVES WITH YOU Your character sheet grows as you level up — unlocking new abilities, spells, and equipment across 20 levels. Your AI Game Master tracks your progress and adapts every encounter to your hero's journey. THE BEST GRAPHICS ENGINE We use the most powerful graphics engine that exists: your IMAGINATION. And our AI brings it to life, generating stunning illustrations for every scene, character, and battle. Your text adventure becomes a visual experience. REAL 3D DICE Roll with real physics. Critical hits land with weight. Failed saves have consequences. NO INVISIBLE WALLS Open-ended, freeform storytelling — not multiple choice. Say anything, try anything, BE anything. The world keeps evolving: new villains rise, allies betray you, and sometimes YOU are the real threat. WHY MASTER RPG AI: — AI specialized in RPG, not a chatbot — Handcrafted lore-rich worlds + full custom mode — 12 classes, 8 races, level 1 to 20 — Homebrew fully supported — Character sheet with automatic progression — AI-generated images every scene — 3D dice with real physics — Free to play — earn tokens by watching rewards We built Master RPG AI because we're tabletop RPG players who grew up on that feeling of magic — Zork, gamebooks, late-night DnD sessions where stories became real. Everyone deserves to feel like a hero. Stop waiting for game night. Download Master RPG AI now. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://rpgmaster.ai/privacy
Screenshots
Verdict
The clearest difference is rating: Polyhedra at 5.0 against Master RPG AI's 4.0. Polyhedra also leads on in-app purchases (none vs 5) and ads (none vs shown). Master RPG AI's advantage is update cadence (every 9 days vs every 2 months) and ratings volume (5 vs 1). On price, review sentiment and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Master RPG AI sells 5 in-app purchases, starting at $6.99 per month. Polyhedra asks for nothing beyond the download.
Polyhedra holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Master RPG AI has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.
Polyhedra ships an update every 2 months, Master RPG AI every 9 days. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.
| Parameter | Polyhedra | Master RPG AI |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.0 (5 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 1 | 5 — better |
| Update frequency | Every 2 months | Every 9 days — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 1 MB | 101 MB |
| Age rating | 4+ | 12+ |
| Developer | Simon Booth | MASTERAI S.R.L.S. |
Customer experience
Polyhedra
Master RPG AI
In-app purchases
Polyhedra
No in-app purchases
Master RPG AI
- Silver Plan$6.991 Month
- Gold Plan$9.991 Month
- Platinum Plan$14.991 Month
- Token Pack$0.99
- Bronze Pack$1.99









