Terms of use

Part B

The private beta

This part applies to pre-release (beta) builds of Ambifold and to taking part in the private beta. It adds to the general terms above.

B1. Joining the beta

You apply with the signup form: you confirm your email address and accept these terms; you get your personal download link right away. If you answer the optional questionnaire, we may pick you as a one-click tester (C9). We let in a limited number of new testers each week, in the order they confirm: when a week's places are taken, we tell you when your turn comes, and email you your personal link then. We may change the number, or pause new places, at any time. Your personal link is yours alone: please don't share it.

B2. Pre-release software

Beta builds are unfinished. A bug may change, duplicate or delete files, on your computer or in your Google Drive. Use the beta only with folders that you have backed up, and never for the only copy of important files. In particular:

• Two-way sync copies deletions too.
• Start with one folder that you also have a copy of elsewhere, and keep your own backups.
• Don't let another sync tool (Insync, ExpanDrive, an rclone mount or rclone bisync) manage the same folder.
• If files look missing: choose Pause all in the tray menu, don't uninstall, don't empty the Drive trash, and email us. See what to do if files look missing.

B3. Free

The beta is free. From 1 December 2026, Ambifold has a free edition (one Google account and up to three pairs of folders) and Ambifold Pro (part C). If you set up Ambifold on a computer before 1 December 2026, Pro is free on that computer until 31 January 2027, without one-click Google sign-in (C9), and the founding price of $15 a year, kept for as long as you stay subscribed, is open to you until at least 28 February 2027 (C9). Beyond part C, we make no promise about any future price, plan or feature.

B4. Your feedback

If you send us feedback, ideas or suggestions, you allow us to use them freely to improve Ambifold, without payment. We don't publish your name or your messages without asking you first.

B5. Diagnostics

Logs and diagnostic information are made on your computer, and only you decide whether to send them to us. The file that About › Save diagnostics makes leaves out file and folder names, paths and addresses, and shows you its whole text first. Logs and screenshots can contain file and folder names and your computer's user name: please check them before you send them.

B6. Talking about the beta

There is no non-disclosure agreement: you may talk and write about the beta, and we ask you to say that it is a beta. Please don't share builds, your personal link (to your invite or download page), download links, or anything you learn about other testers.

B7. Emails

While you take part, we email you about new builds and about problems that affect you, for example a build that you should update or pause. These emails are part of the beta. The two check-in emails (7 and 30 days after you join) come only if you asked for them. To stop all our emails, reply “leave” or “unsubscribe”, or use the unsubscribe link in any of them; that also ends your participation (B8).

B8. Leaving and ending

You can leave at any time. We may end the beta, or your participation, at any time, and we tell you by email. The copy of Ambifold you installed keeps working after that. It also keeps receiving beta builds through Update Manager until you uninstall it or switch its repository off, and once you have left we can no longer warn you by email about a faulty build.

B9. Age

You must be 18 or older to take part in the beta.

B10. Which terms win

For beta builds and the beta, this part B wins over the general terms where they conflict.

Part C

Ambifold Pro

This part applies to Ambifold Pro: its free trial, buying it and using it. It adds to the general terms above, and it takes effect on 1 December 2026.

C1. What Pro is

Pro is a licence to use the Pro features of the Ambifold app. Today, Pro syncs any number of Google accounts and folder pairs, where the free edition syncs one account and up to three of its pairs, and, while places last, it offers one-click Google sign-in as C5 describes: early access, with limited places, that depends on Google. Every sync and safety feature, updates and email support are in the free edition too.

Features that we add to Pro later are included at no extra cost. We plan some, such as the Google Drive folder (files on demand), but we promise no dates for them: the price is for Pro as it is when you buy it.

C2. The free trial

You can try Pro free for 14 days, once per computer (C5), by starting the trial in the app. It needs no card and no account with us. It ends by itself after 14 days: nothing is charged, and C7 applies. Starting the trial contacts our licence server (C8).

C3. Buying Pro

Our order process is conducted by our online reseller Paddle.com. Paddle.com is the Merchant of Record for all our orders. Paddle provides all customer service inquiries and handles returns.

• Prices and taxes. Prices are in US dollars and include sales tax or VAT where it applies: the price shown is the price you pay, and Paddle pays the tax out of it. Paddle may show the price in your own currency before you pay.
• A yearly subscription renews by itself every year, at the price it started with, until you cancel it. You can cancel at any time in Paddle's customer portal: follow the link in any email from Paddle about your purchase, or go to paddle.net. Pro then stays until the end of the year you paid for, and nothing more is charged.
• If a renewal payment fails, Paddle tries it again for up to 30 days, and Pro keeps working meanwhile. If no payment succeeds, Paddle cancels the subscription and tells you by email, and C7 applies.
• The founding price. Until version 1.0 of Ambifold is released, and in any case until 28 February 2027, anyone can start a yearly subscription at the founding price of $15 a year. A subscription keeps the founding price for as long as it continues; if it ends, a new subscription is at the price of the day. Once the founding price has closed, new subscriptions are at the regular price, $19 a year.
• One-click sign-in and the founding price. If Google ever charges us per user for one-click Google sign-in (Connect), subscriptions at the founding price keep every other part of Pro at $15 a year, and you connect with your own Google client, as the free edition does. C5 says what you can get back.
• Price changes. We may change the price of Pro, except the founding price of a subscription that continues. A new price never applies to a year you have already paid for. If it applies to your subscription, we email you at least 30 days before the renewal it applies to, so that you can cancel first.
• If we stop offering Ambifold, renewals stop, and Pro keeps working until the end of the year you paid for.

C4. The Founder lifetime licence

• A Founder licence is Pro for a single payment of $59, tax included, with no renewals. It includes all of Pro, with the features we add to it later, and every update, for as long as we offer Ambifold, on up to three computers (C5).
• What “lifetime” means. The Founder licence is a lifetime licence in this sense: it lasts for the life of the Ambifold product line, that is, for as long as we offer Ambifold, in this or later versions; not for your lifetime or ours. It is not a promise of one-click Google sign-in, which depends on Google (C5).
• We sell it only to the first 100 buyers, and only until version 1.0 is released, whichever comes first. If a few more are paid for at the same moment as the 100th, we honour them too.
• If Google ever charges us per user for one-click Google sign-in (Connect), Founder licences keep every other part of Pro, and you connect with your own Google client, as the free edition does. C5 says what you can get back.
• Once its refund window has passed (C6), a Founder licence doesn't expire, and it keeps working on the computers where it is activated, even if we stop offering Ambifold: there, it doesn't need our licence server. Activating it on a new computer, or again after you reinstall Linux, does need our licence server. We intend to keep the server running for as long as we offer Ambifold, but we can't promise that it runs after that. Nor can we promise that Google's services will keep working with Ambifold (section 5).

C5. Computers and accounts

• A Pro licence, yearly or Founder, works on up to three computers at a time. Here a “computer” is one Linux user account on one computer: two people with their own logins on the same computer count as two. The free edition works on any number of computers.
• To move Pro to another computer, remove it in the app on the old one (Pro › Remove Pro from this computer), or replace one of your three computers from the new one. You can replace up to three computers in any 30 days. A computer that hasn't contacted our licence server for 400 days is freed by itself.
• Pro doesn't limit how many Google accounts or folder pairs you sync. One-click Google sign-in (Connect) connects a Google account through Ambifold's own Google client instead of yours. It is part of paid Pro, not of the free trial or of the beta testers' free Pro (C9). It works for one Google account per computer while Google reviews Ambifold, and for up to five Google accounts per computer once Google approves it; accounts that you connect with your own Google client are not limited.
• While places last. Until Google verifies Ambifold, Google lets only 100 Google accounts in total sign in through Ambifold's client, shared by all users, including beta testers and our own tests, and it shows a warning that it hasn't verified the app. About 70 of these places are for buyers. They may run out before you buy: you then connect with your own Google client, which always works, and Pro is otherwise the same. Google decides whether and when it verifies Ambifold, so we can't promise a date, or that it will. When Pro ends, accounts that you connected this way keep syncing as C7 describes; reconnecting one needs Pro, or your own Google client.
• If one-click sign-in is taken out of Pro. If we take one-click Google sign-in out of Pro, or it stops for good because Google no longer lets Ambifold's client sign in or charges us per user for it, and your licence has used it, you can choose to get money back instead of carrying on with your own Google client. For a yearly subscription: we refund the unused part of the year you paid for, by days, and the subscription ends. For a Founder licence: we refund the price you paid less one thirty-sixth of it for each full month since you bought it (so nothing after three years), and the licence ends. Ask us within 60 days of our email that tells you about the change. The places running out (above) is not such a change. This doesn't limit your rights under the law.

C6. Refunds

You can get a full refund within 30 days of your first payment for Pro (yearly or Founder), and within 14 days of each yearly renewal, for any reason. Our refund policy says how, and what happens after a refund. It doesn't limit your rights under the law.

C7. When Pro ends

Pro ends when the trial ends, when a subscription ends, or after a refund or a reversed payment. Then:

• Nothing is deleted: not your files, your folder pairs, your Google accounts or their sync history. A sync that is running finishes first.
• The free edition's limits apply again: one Google account and up to three of its folder pairs keep syncing. You choose which in the app, at any time, even ahead of time. Until you do, the first three folder pairs of the first Google account you connected that has any keep syncing, and the app asks you to confirm them.
• The other folder pairs wait. Their files stay on your computer and in Google Drive, untouched. If you get Pro again, they carry on where they left off, once the app has checked what changed in the meantime.

C8. Licence codes and the licence server

• Your licence code is shown on the page after you pay and emailed to you. If you started the purchase in the app and pay on the same network as that computer, the app also picks it up by itself; otherwise, you enter it in the app. It is for your own computers (C5): please don't publish it, share it beyond them or resell it. We may switch off a code that has been published or resold, and give its buyer a new one. If you lose it, you can get it again at ambifold.com/account.
• The app activates and checks Pro with our licence server, license.ambifold.com: when you start the trial, buy from the app, enter a code, restore, replace or remove Pro, renew a cancelled subscription, or click Check now; and, while you have a Pro licence or the trial, about once a day when your computer is on and online. Nothing else makes the app contact it, and the free edition never does by itself. Our privacy policy says what the app sends.
• If the app can't reach our server (for example, when you are offline), Pro keeps working for about 15 days after its last answer, while the app tries again once a day. The app tells you if it has had no answer for about a week. A Founder licence whose refund window has closed keeps working without an answer (C4). If a network keeps blocking our server, write to us and we will help. None of this applies once our server has answered that a subscription was cancelled or refunded, that its payment was reversed, or that this computer's place went to another computer (C5).
• Please don't remove or get around the app's licence checks.

C9. Beta testers

If you set up Ambifold on a computer (connected a Google account or added a folder pair) before 1 December 2026, Pro is free on that computer until the end of 31 January 2027 (UTC). The app recognises this by itself: there is nothing to buy or enter. After that, the free edition's limits apply as in C7, unless you get Pro: the founding price (C3) is open to you, as to everyone, until version 1.0 and at least until 28 February 2027, and the free trial (C2) is still available on that computer.

This free Pro doesn't include one-click Google sign-in. We may give some testers a free tester licence: Pro with one-click sign-in, on one computer, until 31 January 2027. It is personal, includes the anonymous weekly health report, and ends earlier if you leave the beta or break these terms (B8). One-click works only while Google lets Ambifold's client sign in (C5); otherwise you connect with your own Google client.

C10. Which terms apply

Part C and the general terms above apply to Pro itself: the licence, the trial and what happens when Pro ends. Paddle's buyer terms, which you accept at checkout, apply to the payment: the order, the charges and taxes, invoices, and how a refund is paid. For Pro, part C wins over the general terms where they conflict.