Last updated: August 7, 2026

This End User License Agreement ("Agreement") is between you and totte-dev ("we", "us") and governs your use of Playto and Playto Lite (the "Software"). By installing or using the Software, you agree to this Agreement. If you acquired the Software through Steam, the Steam Subscriber Agreement also applies; where the two conflict regarding Steam's services, the Steam Subscriber Agreement controls.


We grant you a personal, non-exclusive, non-transferable license to install and use the Software on devices you own or control, for personal, non-commercial use. Using the Software while creating or streaming your own content (videos, live streams) is permitted, including monetized content. All rights not expressly granted are reserved.


The Software captures portions of your screen that you select, recognizes text in those captures, and displays translations and learning aids. Captures and recognized text are processed locally on your device. Captured images and captured text are not sent to us, other than the individual dictionary-form words you look up, save, or review (described in Section 5), support reports you explicitly choose to send (Section 5), and — only if you explicitly enable the optional cloud translation service — the recognized text described in Section 6. See Section 5 for the limited, anonymized usage statistics the Software sends.

The Software reads pixels from the screen only. It does not read or write other programs' memory, does not modify game files, and does not inject code into other processes. To support cursor-based features, it uses a standard system-wide mouse-position listener that runs entirely inside the Software's own process.


You are responsible for complying with the terms of the games and other software you use alongside the Software, and with applicable law. Some online games restrict third-party tools; check the rules of the game you play. The Software is a reading and learning aid and must not be used to gain unfair advantage in competitive play.


The Software includes third-party open-source components, and downloads machine-learning models at first run. These components and models are listed with their licenses in the THIRD-PARTY-NOTICES file distributed with the Software and in the in-app licenses view. Each model is licensed under its own terms (which may include separate use terms) and may not be extracted and redistributed except as those terms allow.


To improve the Software, it sends us limited, anonymized usage statistics by default. This includes: app version, edition (free, Steam, or Pro), platform, and UI language; feature, mode, and capture-method usage; language settings and language pairs; setup progress, days since install, and launch counts; error codes; and vocabulary-engagement events — when you look up, save, or review a word, the dictionary form of that word with its part of speech, coarse difficulty level, review result, your overall proficiency bucket, and the associated game title and Steam App ID. It does not include screen captures, screenshots, translated sentences, free text, personal files, or your Steam identity.

A randomly generated installation identifier (not linked to your Steam account or any account) is used only for aggregate setup and milestone statistics — such as first launch, setup completion, model readiness, and first successful translation. These records mark that a step was reached; they carry no text, image, or file content. Error codes and all other statistics use a token that changes daily and cannot be linked across days.

You can turn these statistics off at any time in Settings → Advanced → Telemetry. Details are in our Privacy Policy: https://playto.dev/privacy/. We rely on our legitimate interest in improving the Software as the legal basis for this processing where such a basis is required.

Separately, if you contact support from inside the Software, a diagnostic report is sent only when you choose to send it. It can include application logs (with recognized and translated text masked out), system information such as GPU and CPU model, your settings, profile names (masked by default), and an email address if you provide one.


The Software can optionally translate and generate dictionary entries through our cloud service ("Playto Cloud"). It is off by default and is used only after you explicitly enable it in the app. Everything in Section 2 remains true whenever you have not enabled it, and you can switch back to local processing at any time; enabling the cloud service never removes or disables local features.

When enabled, the text recognized in the screen areas you selected — and, if you enable cloud dictionary generation, the saved words being defined — is sent over an encrypted connection to our relay service, which passes it to a third-party AI provider to produce the translation or definition. Screen captures and images are never sent; only recognized text is. Our relay does not store this text: it is not written to our databases or logs. The provider processes it only to return the result; we use provider services whose terms do not permit use of this content to train their models. The current provider is listed in our Privacy Policy and may change.

To grant and meter the free trial, we verify through Steam that you own the Software and keep a service account keyed to your Steam identifier, containing an access credential (stored as a hash), your remaining usage balance, and daily aggregate usage counts (request and token counts — no text). This record is separate from the Section 5 statistics and is not linked to the Section 5 installation identifier. The trial is limited (currently 500,000 tokens, valid for 14 days after activation, once per Steam account). We may change trial terms, providers, or pricing of any future paid tier, and may suspend or discontinue the cloud service; when the balance runs out or the service is unavailable, the Software returns to local translation.


Playto Lite is a free edition with limited features and limited history retention. We may change what is included in the free edition. Learning data you create in Lite carries over if you purchase the full version on the same device.


The Software is under active development. Features may change, be added, or be removed. We may update the Software automatically through Steam.


The Software is provided "as is", without warranties of any kind. Machine translation and text recognition are imperfect; translations may be wrong. Do not rely on the Software where accuracy is critical. We do not warrant uninterrupted or error-free operation.


To the maximum extent permitted by law, we are not liable for indirect, incidental, special, consequential, or punitive damages, or loss of data, arising from your use of the Software. Our total liability under this Agreement is limited to the amount you paid for the Software. Nothing in this Agreement excludes liability that cannot be excluded by law, and it does not affect your statutory rights as a consumer.


This Agreement ends automatically if you materially breach it. You may end it at any time by uninstalling the Software. Sections 4, 9, 10, and 12 survive termination.


This Agreement is governed by the laws of Japan, without regard to conflict-of-law rules. Mandatory consumer-protection rules of your country of residence remain unaffected.


support@playto.dev