Signer: Sign PDF Documents — Terms of use

Effective date: 2026-09-29

Signer: Sign PDF Documents (shown on your Home Screen as Signer) is made by KLM Labs. These terms are the agreement between you and KLM Labs when you use the app. Please also read the Privacy Policy, which explains what stays on your device and what the app collects.

Apple's standard licence applies

The app is licensed to you under Apple's Licensed Application End User License Agreement (the "Standard EULA"), in addition to these terms. Where the two conflict on a point Apple's licence covers, Apple's licence governs. Purchases in the App Store are also subject to Apple's own terms.

What you may do with the app

You get a personal, non-exclusive, non-transferable licence to use the app on Apple devices you own or control, for your own work or personal use. The documents you sign and the signatures you create are yours.

You may not resell, rent or redistribute the app itself, or try to get around its purchase checks. Only sign documents you are entitled to sign, and only with your own signature or one you are authorised to use.

Signer Pro, free trial and payment

To start using the app, you need Signer Pro or its free trial. There are two plans:

Pro Yearly: an auto-renewing subscription, one year at a time. In the United States it costs US$19.99 a year.
Pro Lifetime: a one-time purchase with nothing to renew. In the United States it costs US$39.99.

Neither plan includes Family Sharing. The price, billing period and any free trial are shown in the app before you confirm a purchase. Prices in other countries are set through the App Store in local currency, may include local taxes, and are the ones shown to you at purchase.

Free trial. Pro Yearly includes a 7-day free trial for eligible new subscribers. Apple decides eligibility; generally, one trial per Apple Account for this app's subscription. When the trial ends, the yearly subscription starts and you are charged unless you cancel at least 24 hours before the trial ends. If you allow notifications, the app can remind you 2 days before the trial ends.

Payment and automatic renewal. Payment is charged to your Apple Account when you confirm a purchase, or when a free trial ends. Pro Yearly renews automatically each year at the then-current price unless you cancel it at least 24 hours before the end of the current period. Your account is charged for the renewal within the 24 hours before the period ends. If a price changes, Apple tells you in advance and asks for your agreement where its rules require it. If a renewal payment fails, Apple retries it, and you keep access for up to 16 days while it does.

Cancelling. Cancel in your Apple Account, not by deleting the app:

On your iPhone, open Settings, tap your name, then Subscriptions, choose Signer Pro and tap Cancel Subscription.
Or, in the app, open Settings → Manage Subscription.

Deleting the app does not cancel a subscription. After you cancel, you keep Signer Pro until the end of the period you have already paid for. Buying Pro Lifetime does not cancel Pro Yearly; cancel the yearly plan yourself so it does not renew.

Restoring. Signer Pro belongs to the Apple Account that bought it; the app has no account of its own. On a new iPhone or after reinstalling, sign in with the same Apple Account and tap Restore on the plans screen, or Settings → Restore Purchases.

Refunds. Apple handles all payments, so KLM Labs cannot charge or refund your account directly. To ask for a refund, go to reportaproblem.apple.com. Refunds follow Apple's policies and the law where you live.

When Signer Pro ends. When a subscription or trial ends, or a purchase is refunded, your documents stay on your iPhone. You can still open them, place signatures, and share or save again a document you already shared or saved; finishing, sharing or saving any other document needs Signer Pro again. You can subscribe, buy Pro Lifetime or restore an active plan at any time.

Changes to plans. We may change plans, prices or trial offers for new purchases. Changes for existing subscribers are made through Apple under its rules and notices.

Your documents and signatures

The app places your signature and other marks on a document and makes a copy for you to share or save. It does not verify anyone's identity, and it does not create certificate-based digital signatures, an audit trail or proof of who signed. Whether an electronic signature is valid or accepted for a particular document depends on the law and on the people or organisation you send it to. It is your responsibility to check that before you rely on it. Nothing in the app is legal advice.

Your documents and signatures are stored on your device, and in your device backups if you have them turned on. We do not hold a copy, so we cannot recover them if your device is lost or reset or the app is deleted; restoring your own backup may bring them back. Keep your own copies of anything important.

Changes to the app and these terms

We may update the app, change or remove features, or stop offering it. We may update these terms; the effective date above shows the latest change, and using the app after a change means you accept the updated terms.

No warranty, and the limit of our liability

The app is provided "as is". To the extent the law allows, we do not promise that it will be uninterrupted, error-free or fit for a particular purpose, and we exclude implied warranties.

To the extent the law allows, KLM Labs is not liable for indirect or consequential loss, including lost profits, a rejected or invalid signature, or loss of data. Where liability cannot be excluded, it is limited to the amount you paid for the app in the twelve months before the claim.

Nothing here removes rights you have under consumer law where you live, including any statutory right to a refund or remedy. If a term conflicts with such a right, that right wins.

Getting in touch

Email klm.labs.inc@gmail.com. We aim to reply within three business days. See also the support page.