The snap-and-solve math app category has gotten crowded since Photomath kicked it off in 2014. This honest comparison tests the five most-installed math solver apps of 2026 — Photomath, Mathway, Symbolab, Gauthmath, and Solver AI — across OCR accuracy, step-by-step quality, topic coverage, free tier, and pricing honesty. Photomath still owns clean OCR for printed textbook equations. Mathway has the widest STEM coverage with chemistry and physics alongside math. Symbolab shows the deepest worked steps for college calculus and beyond. Gauthmath's live human tutors handle word problems and geometry proofs better than pure AI engines. And the modern AI-first generation (Solver AI) handles photos, typed equations, and word problems in one app with conversational explanations. The guide includes a quick comparison table, per-app deep dives with pros and cons, a decision tree, and FAQs covering free tiers and which app is best for college students.