Nani!? is an AI translation and writing assistant developed by Kioku LLC. Instead of returning a single translation the way conventional services do, it presents several candidate translations tuned to different tones and situations ─ casual, formal, and everything in between ─ alongside explanations of the nuance each one carries. It also handles text inside images and screenshots, drafts replies to emails and DMs, proofreads with AI, summarizes, and translates conversations, covering everything from everyday slang to business documents. Released on October 3, 2025, it is available in the browser and as a desktop app for Mac (macOS 14+, Apple Silicon) and Windows.
Key Features
- Multiple tone-specific translations with explanations: For the same source text, it shows several translations at once ─ more casual, more polite ─ and explains how each will be received. That cuts down on the “which one should I pick?” moment
- Image and screenshot translation: Translate text inside images directly. The Pro plan adds a screenshot translation feature so you can crop part of your screen and translate it immediately
- AI proofreading and reply drafts: Have your own writing in a foreign language checked for grammar, typos, and phrasing. It can also draft replies to emails, DMs, and chat messages you receive
- Back-translation for verification: Translate the output back into the original language so you can confirm for yourself that the meaning has not drifted
- Call it up from anywhere with a shortcut: The desktop app lets you translate selected text on the spot with a keyboard shortcut, so you stop bouncing between your browser and your mail client
- Broad language coverage: Target languages include English, Japanese, Chinese, Korean, Spanish, Portuguese, French, German, Italian, and Russian, while source text can come from over 100 languages. Proofreading supports 34 languages
- Reading guides and AI voice: On the Pro plan you get phonetic reading guides and natural AI voice playback, useful for checking pronunciation while studying or preparing for a conversation
Pricing
| Plan | Price | Highlights |
|---|---|---|
| Free | ¥0 ($0) | AI translation and AI proofreading, simple image translation, shortcut translation of selected text, Mac/Windows support. Roughly 4,000 characters per request |
| PRO | ¥1,000 ($8) per month, 20% off with annual billing | More capable model, smoother image translation, screenshot translation, up to 100,000 characters per request, 2,000,000+ tokens per month, reading guides and AI voice |
| Team | Contact for pricing | Plan for multi-person use |
Pricing is current as of August 2026. For the exact annual billing amount, Team plan details, and the latest pricing, check the official site.
Pros & Cons
✅ Pros
- Because the output is not narrowed to a single translation, you choose what fits your reader and situation ─ and the explanations tell you why
- Translation, proofreading, reply drafting, and summarization live in one tool, so you do not have to switch services by task
- Image and screenshot translation means UI captures and photos of printed material work as-is
- The desktop shortcut lets you translate without leaving the app you are working in
- The free plan is enough to try the core translation, proofreading, and image translation features
⚠️ Cons
- The free plan caps characters per request, so longer translation and proofreading effectively require the Pro plan
- There is no Linux desktop app (the browser version is still available)
- The list of target languages is around ten major languages, narrower than the source-language coverage
- The multi-option design carries more information than you need when you just want one fast translation
- Team plan pricing is not published, so organizations need to make an inquiry
Comparison with Similar Services
| Criteria | Nani!? | DeepL | Google Translate | ChatGPT |
|---|---|---|---|---|
| Primary use | Tone-specific options plus explanations and proofreading | High-accuracy machine translation | Instant translation across many languages | Translation inside a general AI chat |
| How output is shown | Multiple candidates with nuance notes | One result (alternative wordings available) | One result | Adjusted turn by turn in conversation |
| Image translation | Yes (screenshot translation on Pro) | Yes (app and some plans) | Yes | Yes (image input) |
| Proofreading / reply drafting | Yes | Partial (Write feature) | No | Yes |
| Free plan | Yes | Yes | Yes | Yes |
Who Is It For
- People who hesitate every time over whether an English email or DM sounds rude
- Business users who work with overseas clients and colleagues and need to switch between formal and casual by situation
- Anyone who wants AI to proofread their own foreign-language writing before sending it
- People who want to translate the UI of overseas apps or English documents straight from a screenshot
- Learners who want to understand why a translation reads the way it does, not just the “correct” answer
Summary
Nani!? takes a different position from existing translation services by refusing to commit to one output, returning tone-specific candidates with explanations instead. Since translation, proofreading, reply drafting, and summarization are bundled together, the benefit grows the more foreign-language communication is part of your day. Try the core features on the free plan, and consider Pro once you start doing longer texts and image translation in earnest.