What Fumiko does
Tekst (Text)
You paste text or open a .txt file.
Manga
You choose a page from the gallery or through “Share.” Fumiko finds the speech bubbles, reads the text, translates it and writes the translation into the speech bubbles.
Ekran (Screen)
A floating bubble over other apps translates what is visible on the screen.
Source language
Fumiko detects it on its own. You choose the target language: up to 47 languages, depending on the model.
Names and terms
You provide a list of “source = translation” pairs, and the translation keeps them consistent across the whole chapter.
“Własne API” (“Own API”)
Optionally, you can translate text through your own account with Claude, Gemini, ChatGPT, OpenRouter or another OpenAI-compatible provider. By default, everything happens on your phone.
Who it's for
For people who read novels, manga, manhwa and webtoons in languages they don't know or know only a little. The best-tested directions are Japanese, Korean and Chinese into Polish and English.
What stays on your phone
- the text you translate and the translation,
- manga pages and images,
- the screen image when you translate the screen. It exists only in memory. Nothing is written to storage.
You don't create an account. Fumiko has no analytics tools.
What leaves your phone and why
| What | Where to | Why |
|---|---|---|
| Request for the list of models | The Fumiko server | The list of models, their sizes and requirements |
| Download of the model file and text recognition packs | Hugging Face | The model file. The phone verifies its checksum (SHA-256). |
| Only if you turn on “Własne API”: the text to be translated and your key | The provider you choose | Translation on your account with the provider, with your consent |
By default, text, images and screenshots do not leave your phone. Only “Własne API” sends text out of the phone. Images and screenshots never leave it. The app's logs do not contain the content you translate.
With every download, the service in question sees your phone's IP address.
How much space it takes
The models are large. Download them over Wi-Fi. Fumiko checks on its own which models your phone can handle.
| Model | File | Who it's for |
|---|---|---|
| Index-Translate 2B (small) | 785 MB | phones from about 4 GB of RAM |
| Hy-MT2 1.8B | 1.13 GB | phones from about 6 GB of RAM |
| Index-Translate 2B | 1.31 GB | phones from about 6 GB of RAM |
| Hy-MT2 7B | 4.62 GB | phones with 12 GB of RAM; works without Adreno graphics, but slowly; the best translation |
For manga and screen translation, Fumiko downloads text recognition packs after the first launch, about 123 MB in total: about 59 MB (Japanese, Chinese, Korean, English) and about 8 MB each for eight other scripts, such as Latin, Cyrillic, Arabic and Thai.
Sizes may change. The app shows the current ones before you download.
How fast and how good
On a fast phone (vivo X300 Ultra, 12 GB of RAM), the Hy-MT2 1.8B and Index-Translate 2B models translate a manga page in about 12 seconds and a novel chapter in about 2 minutes. The smallest model: about 14 seconds and 3 minutes. The largest model: a page in about 48 seconds, a chapter in about 7 minutes. On less powerful phones it will be slower.
The translation is done by an AI model, not a person. It can make mistakes, skip passages or get names wrong. In the test, the translations were rated by AI models, not people, without knowing which translation was which. The largest model came out best of those tested, also in an automatic comparison with a human translation. The smaller models are good enough for English but clearly weaker for Polish.
Requirements
- The app's interface is in Polish.
- Android 9 or later, 64-bit phone.
- The model and packs take from about 0.9 GB to about 4.8 GB. Screen translation with the largest model also needs a faster model, about 6 GB in total. To download, Fumiko needs about 0.5 GB of extra free space. The app itself also takes up space.
- Largest model: a phone with 12 GB of RAM. It works without Adreno graphics, but slowly.
- Internet only for “Własne API” and to download the list of models, the models and the packs.
- iPhone: later.
When?
- In preparationnow
- Android on Google Play
- iPhone: later
- Coming soon to Google Play
Questions
Does Fumiko work without internet access?
Yes, once you download a model and the text recognition packs. Text, manga and screen translation then work offline.
Do my pages and screenshots go anywhere?
Not by default. Text, images and screenshots stay on your phone. A screenshot exists only in memory. With “Własne API” turned on, the text to be translated goes to the provider you chose. Images and screenshots never leave your phone.
How much space will Fumiko take?
A model takes from 785 MB to 4.62 GB. On top of that, about 123 MB of packs for manga and screen translation. Screen translation with the largest model also needs a faster model, up to 1.6 GB.
Which model should I choose?
Fumiko shows the models your phone can handle. A larger model translates better but more slowly. For Polish, the difference is large.
Which languages?
Fumiko detects the source language on its own. Translation is possible into 47 languages, but not every model knows all of them. Quality has been checked only for Polish and English. Fumiko cannot read manga pages or the screen in Hebrew, Bengali, Gujarati, Khmer, Burmese or Tibetan. You can translate text in these languages in Tekst mode. As target languages, they work in all modes. In manga and screen translation, the language is detected from among the downloaded packs.
Where do the models come from?
They are open translation models under the Apache 2.0 license (Hy-MT2 by Tencent and Index-Translate). The phone downloads them from Hugging Face and verifies the checksum of each file.
Is the translation as good as a human translator's?
No. It is a reading aid, not a translation for print. A larger model translates clearly better, and the smaller ones lag behind, especially in Polish.