# Terms of Service — TransFlow

Canonical: https://transflow.dev/terms/
Last updated: 2026-10-28

# Terms of Service — TransFlow

**Last updated: 2026-09-24**

TransFlow is a browser extension that translates text, images and pages. These
terms cover your use of the extension and of the optional **TransFlow Cloud**
relay, including paid plans sold through our merchant of record,
[Polar](https://polar.sh).

## The short version

- **The extension is free to use.** Paid plans only raise the limits of the
  optional cloud relay — every local feature stays free.
- **Paid plans renew automatically** (monthly or yearly) until cancelled.
  Cancel any time from the Polar customer portal or the link in your order
  email; you keep access until the end of the paid period.
- **License keys** are issued by Polar at purchase. Each key can be activated
  on up to 5 devices.
- **BYOK plans** use your own provider API keys — your keys, your provider
  accounts, and their terms apply.
- The service is provided **as is**, without warranties, like most
  software.

## The software

The TransFlow browser extension and TransFlow Cloud are proprietary software.
We grant you a personal, non-exclusive, non-transferable, revocable license to
install and use the extension for free, and to use TransFlow Cloud under these
terms. The source code is not published. You may not copy, modify,
redistribute, resell, reverse engineer or decompile the software, or build
derivative works from it, except where the law gives you that right regardless
of this restriction. All rights not expressly granted are reserved.

## Free and paid plans

The free tier includes a daily TransFlow Cloud quota and every feature of the
extension itself. Paid plans (Pro, Pro Max, BYOK Supporter and limited
lifetime offers) raise quotas and unlock cloud-side features as described on
the pricing page. Plan details, prices and included quotas are shown at
checkout and may change for future billing periods; changes never apply
retroactively to a period you already paid for.

Quotas are metered in units of up to 1,000 characters; for generative
features (Explain, Rewrite, Summarize, Ask) both the request and the answer
count. Each paid key also has a monthly fair-use limit on the upstream cost
it may cause, set well above ordinary use. Past it — or past the plan's
quota — requests are served by the free tier's engines, or refused, until
the next month; the extension's local engines and your own provider keys
keep working.

## Payments, billing and refunds

Payments are processed by **Polar**, our merchant of record. Polar is the
seller on your card statement, handles taxes and invoices, and applies its own
[Checkout Buyer Terms](https://polar.sh/legal/checkout-buyer-terms) to each
transaction.

- **Subscriptions renew** automatically at the interval you chose until you
  cancel.
- **Cancel any time** from the Polar customer portal (linked in every order
  and renewal email) or by emailing support@transflow.dev. Cancellation stops
  the next renewal; your plan stays active until the end of the paid period.
- **Refunds**: if something goes wrong with a charge, email
  support@transflow.dev within 14 days of the payment and we will make it
  right — bugged charges are refunded in full. We do not offer partial refunds
  on unused time for subscriptions cancelled mid-period.
- **Failed renewals**: if a renewal payment fails, Polar retries it; benefits
  pause if the retries exhaust.
- **Lifetime plans** grant access for the lifetime of the TransFlow Cloud
  service, not the lifetime of the universe — if we ever shut the relay down we
  will give reasonable notice and the extension keeps working on local
  engines.

## License keys

Purchases of Pro, Pro Max and BYOK Supporter deliver a Polar license key by
email and in your Polar customer portal.

- One key activates on **up to 5 devices**.
- Keys are personal: don't share or resell them. We may revoke keys involved
  in abuse, chargebacks or refunds.
- If a key stops working, email support@transflow.dev and we'll sort it out.

## Your own API keys (BYOK)

If you configure your own provider keys (Gemini, Ollama, OpenRouter and
others), your requests go to those providers under your account and their
terms. Provider costs, quotas and content rules are between you and the
provider; we never see or store your keys outside your browser.

## Acceptable use

Don't abuse TransFlow Cloud: no reselling or pooling your quota, no attempts
to bypass limits, no automated bulk scraping through the relay, and nothing
unlawful. Accounts or keys that abuse the service may be suspended with
notice where practicable.

## Privacy

How the extension and the cloud relay handle text is described in the
[Privacy Policy](/privacy/) — in short: no account, no telemetry, request
content is never logged, and identical translations may be cached under a
content hash for up to 24 hours.

## Availability and changes

We aim to keep TransFlow Cloud reliable but don't promise uninterrupted
service. The extension keeps working on local engines even if the cloud is
unreachable. We may update these terms; material changes are announced on the
website and in release notes, and continued use after an update means you
accept the new terms.

## Warranty and liability

TransFlow is provided **as is** and **as available**,
without warranties of any kind, express or implied — including merchantability
and fitness for a particular purpose — to the maximum extent permitted by law.
We are not liable for indirect, incidental or consequential damages, lost
data, or translation errors. Our total liability for paid services is limited
to the amount you paid in the 12 months before the claim.

## Contact

Questions about these terms, a charge, or a license key:
**support@transflow.dev**.