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ReplyAssistant

ReplyAssistant checks grammar, translates text, and helps you write better emails or messages, but it may struggle with extremely long documents.

Checked 5 Oct 2026 Reviewed by Alex Listed since September 2024

Screenshot of ReplyAssistant

At a glance

Starts at Free No paid plan found on the App Store, September 2026.
Free tier No
Platforms iOS, iPadOS
Best for Writers, translators
Not for Long document writers

3.8 out of 5

Scored by Alex after real use

Our verdict

ReplyAssistant is a handy writing assistant for quick corrections and translations. However, it might not be ideal for extensive document editing due to its limitations on handling large files.

✓What it does well

Grammar CheckIdentifies and corrects grammatical errors before sending messages or emails.
TranslationInstantly translates text in multiple languages without leaving the chat.
Custom PromptsCreates personalized prompts for quick use when needed.

✕Where it falls short

Limited Language SupportSupports only a limited number of languages, excluding some less common ones.
Long Document HandlingStruggles with very long documents due to its file size limitations.
Extra In-app PurchasesRequires in-app purchases for some features like advanced models and translations beyond free limits.

Key features

Write AssistAllows you to ask AI to generate content based on your needs.
Reply with PromptAdds a prompt for the AI when replying, guiding its response.
ChatPDFAllows you to upload PDFs and ask questions about their content directly from the app.
advanced model supportSupports advanced gpt-4o model for better content generation.

Questions about ReplyAssistant

What does ReplyAssistant do?

ReplyAssistant is a writing assistant that checks grammar, translates text and helps write better emails or messages. It can generate content on request, take a guiding prompt when replying, and answer questions about uploaded PDFs through its ChatPDF feature. The vendor says it supports the advanced GPT-4o model.

Does ReplyAssistant work on iPad?

Yes. ReplyAssistant runs on iOS and iPadOS. It translates text in multiple languages without leaving the chat, and users can create custom prompts for quick use when needed. Toolio lists it as best for writers and translators.

What are the limits of ReplyAssistant?

The reviewer says ReplyAssistant struggles with very long documents because of file size limitations, and it supports only a limited number of languages, excluding some less common ones. Some features, such as advanced models and translations beyond free limits, require in-app purchases.

How does Toolio rate ReplyAssistant?

Alex scored ReplyAssistant 3.8 out of 5 after real use, on 5 Oct 2026, calling it a handy assistant for quick corrections and translations. Toolio lists FutureWrite AI for Writing Chrome Extension, Gmail GPT, Mailfast and AnswerAI Homework AI Tuto Chrome Extension as alternatives.

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