The #1 Slay the Spire 2 Companion App
Browse all 576 cards, 288 relics, and 111 enemies with tier ratings and synergies. Get AI-powered strategy coaching from Spiro. Your complete STS2 guide, free on iOS.
Complete Slay the Spire 2 Database
Every Card, Relic & Boss in Your Pocket
The most complete Slay the Spire 2 database app. Search and filter every card, relic, potion, enemy, enchantment, and boss pattern. Updated within hours of each STS2 patch, no app store update needed.
All 576 STS2 Cards, Searchable
Browse every Slay the Spire 2 card across all 5 characters. Filter by character, cost, type, and rarity. View stats, upgrades, and tier ratings at a glance.
Boss Patterns & Counter-Strategies
Every STS2 boss and elite with move patterns, HP values, and proven counter-strategies. Know exactly what to expect before every fight in Slay the Spire 2.
288 Relics, 63 Potions & More
The complete Slay the Spire 2 compendium. Every relic, potion, enchantment, orb, and keyword. Organized, searchable, and always up to date with the latest STS2 patch.
AI-Powered STS2 Strategy Coach
Meet Spiro, Your Slay the Spire 2 AI Coach
Spiro is an AI strategy coach trained on 1,731 knowledge chunks from real Slay the Spire 2 game data. It understands every card interaction, boss pattern, build archetype, and meta strategy. Ask any STS2 question and get expert-level coaching instantly.
- ✓3 free AI strategy questions per day
- ✓Unlimited AI coaching with Pro subscription
- ✓Knowledge base updated with every STS2 patch
- ✓Context-aware answers backed by real game data
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Why Players Choose SpireSage
The Best Way to Master Slay the Spire 2
Only STS2 Companion App
SpireSage is the only dedicated Slay the Spire 2 companion app on iOS. No other app offers a searchable card database, relic guide, and boss patterns for STS2 on your phone.
AI Coach with Real Game Data
Unlike generic ChatGPT, Spiro is trained on 1,731 knowledge chunks from actual Slay the Spire 2 data. It knows every card stat, boss pattern, and build archetype.
Always Up to Date
The database updates within hours of every STS2 patch. No app store update needed. Your card stats, tier ratings, and boss patterns are always current.
Works Offline
All game data is cached locally after the first load. Browse all 576 cards, 288 relics, and 111 enemies anywhere, even without an internet connection.
Frequently Asked Questions
What is SpireSage?
SpireSage is a free companion app for Slay the Spire 2 that provides a complete searchable database of all 576 cards, 288 relics, 111 enemies, and 63 potions, plus an AI strategy coach powered by 1,731 knowledge chunks from real game data.
Is SpireSage free?
Yes. The full Slay the Spire 2 game database is completely free. You get 3 AI coaching questions per day at no cost. SpireSage Pro unlocks unlimited AI coaching, strategy guides, and removes ads.
How does the AI strategy coach work?
Spiro uses GPT-5 mini with RAG (Retrieval-Augmented Generation) over 1,731 knowledge chunks extracted from real Slay the Spire 2 game data including card stats, boss patterns, build archetypes, and expert commentary. It provides context-aware strategy advice for any STS2 question.
Is the game data kept up to date?
Yes. SpireSage updates its database within hours of every Slay the Spire 2 patch. The app refreshes automatically when new data is available, with no app store update required.
Does SpireSage work offline?
Yes. After the first load, all game data (cards, relics, enemies, potions) is cached locally on your device. You can browse the entire database offline. Only the AI Chat feature requires an internet connection.
Is SpireSage affiliated with Mega Crit Games?
No. SpireSage is an independent, unofficial companion app. It is not affiliated with, endorsed by, or connected to Mega Crit Games, the developer of Slay the Spire 2.
Download the Best Slay the Spire 2 Companion App
Get SpireSage free on iOS. The complete STS2 card database, relic guide, boss patterns, and AI strategy coaching in one app.