AI research assistant for academics
Search and summarise academic papers, extract key findings into structured tables, and trace every claim back to its source. Trusted by researchers at leading universities because it actually cites what it's telling you rather than hallucinating plausible-sounding references. The honest way to do an AI-assisted literature review.
| Rating | 4.5 | 4.7 | 4.6 | 4.6 |
| Reviews | 380 | 190 | 240 | 310 |
| Price | Free / From $12/mo | Free / From $7/mo | Free / $44/yr | From $22/mo |
| Free tier | 5 credits/day | Free | Limited credits | None |
| API access | ✗ | ✗ | ✗ | ✗ |
| Watermark | No | No | No | No |
The world's most-used language learning app — now with AI conversation practice, personalised lesson paths, and an AI tutor for immersive speaking drills across 40+ languages. The gamification works better than most people expect, and the free tier is genuinely useful rather than a perpetual paywall tease.
Socratic AI tutor that asks guiding questions rather than handing over answers — because the research on learning strongly suggests that's how retention actually works. Covers maths, science, humanities, and coding with guardrails designed for learners of all ages. Backed by Khan Academy's deep expertise in what makes learning stick.
Originally built for SpaceX employees' kids — now public and available to everyone. Adaptive maths curriculum where AI identifies exactly where the gaps are and accelerates progress through game-based problem solving rather than repetition. Consistently surprises parents by how quickly kids progress when the curriculum actually adapts to them.