These apps are mentioned in the breakdown of this job. Open each one to compare strengths and limits. The order of the list is not a ranking of fitness.
Rank 3. Review score: 68 out of 100. App Store rating: 4.8★ · 710 ratings
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Shortwave offers genuinely smart inbox organization with AI search and split folders, which sets it apart from ordinary email clients. Gmail-only support, no unified inbox, and limited compose formatting hold back a higher score.
Praised: AI search across your entire email history and automatic message grouping clear out inbox chaos.
Complaints: No Outlook or other provider support, and you cannot bold text in a composed message.
Best for: Entrepreneurs and managers who live in Gmail and are overwhelmed by their inbox
Rank 25. Review score: 44 out of 100. App Store rating: 4.6★ · 3,514 ratings
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Superhuman noticeably speeds up email work through keyboard shortcuts and AI email drafts, but the AI side is weak: meeting scheduler bugs and unstable MCP integration. The main value is UX speed, not generation quality.
Praised: Keyboard shortcuts genuinely cut down email processing time.
Complaints: The AI meeting scheduler produces errors, and there is no unified inbox for multiple accounts.
Best for: Managers and founders with a high volume of business email
Rank 16. Review score: 52 out of 100. App Store rating: 4.5★ · 4,281 ratings
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Spike is an email client with a messenger-style interface and AI writing assistance, not a pure writing tool. AI-composed emails work, but the main value is read receipts and a chat wrapper over email.
Praised: The chat interface on top of email removes the feeling of dealing with a mailbox.
Complaints: Search is limited to 60 days on the free plan, and there is no unified inbox without a subscription.
Best for: Freelancers and small teams handling business correspondence
Rank 1. Review score: 72 out of 100. App Store rating: 4.8★ · 8,239,403 ratings
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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.
Praised: Handles complex editing and style requests faster and more accurately than a search engine.
Complaints: Memory between sessions is inconsistent and sometimes mixes another conversation's context into the current one.
Best for: Anyone who writes regularly and wants a general-purpose AI assistant
Rank 11. Review score: 55 out of 100. App Store rating: 4.7★ · 185,034 ratings
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Claude as a model is highly regarded for reasoning quality and writing assistance, but the mobile app is regularly criticized for instability, crashes, and poor support. The product is stronger on the web.
Praised: The quality of responses on text and nuance of phrasing is above most competitors.
Complaints: The mobile app frequently freezes, loses chats, and is not adapted for assistive technologies.
Best for: Writers and developers who work through a browser
