ReplyLens vs Letterly AI
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
ReplyLens
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ReplyLens helps you write clear, polished replies faster. Paste the message you want to respond to, choose a tone, and generate a reply you can review, edit, and copy. ReplyLens is useful for casual chats, work messages, emails, marketplace conversations, and everyday communication. Key features: ⢠Generate AI-powered reply suggestions ⢠Adjust tone for different situations ⢠Review and edit before using ⢠Copy responses quickly ⢠Simple, focused interface ReplyLens does not send messages on your behalf. You stay in control of what you copy, edit, and send.
Letterly AI
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Letterly AI is an AI-powered writing assistant that helps you rewrite text into the perfect tone for any situation. Whether you're writing business emails, Japanese Keigo, chat messages, social media posts, or multilingual content, Letterly AI makes your writing natural, professional, and easy to understand. ### Key Features ⢠Rewrite text into polite, business, casual, or friendly tones ⢠Convert Japanese into natural Keigo ⢠Improve grammar, clarity, and readability ⢠Generate and refine business emails ⢠Translate and rewrite content in multiple languages ⢠Create natural responses for chats and messaging apps ### Perfect For ⢠Business professionals ⢠Students ⢠Japanese language learners ⢠Customer support teams ⢠Sales representatives ⢠Freelancers ⢠Anyone who wants to communicate more effectively ### Use Letterly AI For ⢠Business emails ⢠LINE messages ⢠Slack conversations ⢠Social media posts ⢠Daily communication ⢠Multilingual writing Write naturally. Communicate confidently. Express yourself with Letterly AI.
Screenshots
Verdict
The clearest difference is iOS requirement: Letterly AI at 15.1 against ReplyLens's 17.0. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | ReplyLens | Letterly AI |
|---|---|---|
| Price | Free | Free |
| Update frequency | ā | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad, iPod ā better |
| Requires iOS | 17.0 | 15.1 ā better |
| Further details ā not scored | ||
| Size | 3 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | Ziyi Wang | Ying Liu |
In-app purchases
ReplyLens
No in-app purchases
Letterly AI
No in-app purchases









