Quick Summary of the Downsides
- Vocably: Very few serious complaints — mainly “it’s small / still growing” and requests for more advanced AI / lexical depth. Highly praised for reliability and clean selective-card workflow.
- Readlang: Solid and cheap, but video is secondary and the review system feels lighter than Anki/Migaku. Occasional platform quirks.
- Migaku: Powerful when it works, but users frequently mention bugs, temporary breakage, price, and complexity.
- Language Reactor:Still the most popular for dual subtitles, but reliability problems (especially Netflix) have become a major complaint in 2026, with recent reviews reflecting frustration.