Werdsmith is a genuine writers' app with novel, screenplay, and poetry modes, a ghost-author feature for breaking creative blocks, and multi-device sync. For mobile fiction writing it is one of the better tools, though the paywall limits free use.
評価点：The next-sentence autocomplete genuinely helps break through a creative block without disrupting your style.
不満点：No way to split a novel into parts or manually control chapter numbers when inserting content.
向いている人：Fiction writers who write regularly and on mobile
The best minimalist editor for serious writing on iOS: polished down to the details, supports Markdown, syncs with iCloud, and has been beloved by writers for over a decade. Downsides include occasional bugs with cloud folders and weak Arabic support.
評価点：Focus mode and typography create a working atmosphere that is hard to replicate in other apps.
不満点：Folders in Dropbox and third-party clouds occasionally disappear after updates.
向いている人：Writers and journalists who need a distraction-free environment and Markdown
Fortelling solves a real problem for writers: keeping characters, timelines, and world-building in one place. Crashes during account creation and an aggressive paywall undermine an otherwise solid experience.
評価点：Depth of world-building tools and the ability to get feedback from other writers.
不満点：Many essential organization features are locked behind a subscription.
向いている人：Aspiring sci-fi and fantasy writers who need a mobile story organizer
Scrivener on iOS was once a full-featured writing tool, but the mobile version has not been updated in a long time, key formatting features are broken, and Dropbox sync is unreliable. The desktop version remains strong.
評価点：Nested folders and binders let you organize even a complex multi-level project with hundreds of notes.
不満点：Font and style formatting crashes on every attempt, and the mobile app has gone years without critical fixes.
OpenAI's flagship AI assistant with broad capabilities for editing, rewriting, and structuring text. The main weakness: the model hallucinates on facts and loses context in long sessions.
評価点：Handles complex editing and style requests faster and more accurately than a search engine.
不満点：Memory between sessions is inconsistent and sometimes mixes another conversation's context into the current one.
向いている人：Anyone who writes regularly and wants a general-purpose AI assistant
