Terms and Conditions

Last updated 25 August 2026

1. Provider and scope

The provider of the software “Zahly” is:

PixelPerfect Solutions, P. Pfeiffer
Av. P. de la Reforma 250, Juárez, Cuauhtémoc
06600 Ciudad de México, Mexico
E-Mail: support@zahly-app.com

These Terms and Conditions govern the use of the Zahly desktop application, the associated account and cloud archive functions, and the website zahly-app.com. They apply to consumers and business customers alike. Deviating terms of the user do not become part of the contract unless we expressly agree to them in writing.

2. Who you buy from (Paddle as Merchant of Record)

All paid orders are processed by Paddle.com Market Ltd. as reseller and merchant of record.

This means the purchase contract for the licence is concluded between you and Paddle. Paddle issues the invoice, collects payment, charges the applicable sales tax or VAT, and handles refunds. The Paddle Buyer Terms apply in addition. These Terms govern the relationship between you and PixelPerfect Solutions regarding the provision, scope and use of the software.

3. Contract and account

Using Zahly requires a free Zahly account; it secures the automatic cloud backup of your documents and enables account recovery. The contract for free use is concluded when the account is created.

A paid subscription is concluded when you complete the paid order in Paddle’s checkout and Paddle confirms the order. You are required to provide accurate information when registering and to protect your credentials from third-party access.

4. Scope of services and plans

Zahly is a native desktop application for macOS (Apple Silicon and Intel) and Windows. Documents are primarily stored and processed locally on your device; final invoices and incoming documents are additionally stored encrypted and immutably in our cloud archive (servers located in Germany).

The current scope and prices are set out in the pricing section of this website. We continue to develop Zahly and may extend the scope or make minor adjustments as long as the core of the contractually owed service is preserved.

Expressly not owed are: real-time synchronisation between several devices, simultaneous multi-user access to one account, a mobile app, a bank connection with automatic payment matching, and an automated full import from other invoicing software.

5. Prices, billing and term

All prices shown on this website include the statutory VAT where applicable. The final amount including the tax applicable in your country is displayed in Paddle’s checkout before you complete the purchase.

Subscriptions are billed in advance for the selected billing period — monthly or yearly. With yearly billing, the annual amount is due in a single payment in advance.

Automatic renewal: the subscription renews automatically at the end of each billing period for the same period unless cancelled beforehand. Payment is collected automatically from the payment method stored with Paddle.

Cancellation: you may cancel at any time with effect from the end of the current billing period. There is no minimum term beyond the selected billing period. Cancel via the link in your Paddle purchase confirmation, via the Paddle customer portal, or informally by e-mail to support@zahly-app.com. Once cancellation takes effect, your account moves to the Free plan; documents already archived remain accessible.

Plan changes are possible at any time; the difference is settled pro rata via Paddle.

Price changes will be announced by e-mail at least 30 days before they take effect and apply from the next billing period. If you do not object or cancel before they take effect, the change is deemed accepted; we will point this out separately in the notice.

6. Right of withdrawal and refunds

Consumers have a statutory right of withdrawal. Details, the model withdrawal form and our refund rules are set out in our Refund and Cancellation Policy.

7. Licence

On conclusion of the contract you receive a simple, non-exclusive, non-transferable right, limited to the term of the contract, to use Zahly as intended for your own business or professional purposes. Zahly is designed for use by one person or one device at a time.

Not permitted are in particular: passing on, renting out or sub-licensing the software to third parties; reverse engineering beyond the legally permitted extent; removing copyright notices; and circumventing the technical limitations of the plans, such as the footer note in the Free plan.

8. Your obligations

You are responsible for the accuracy of the documents created with Zahly and for their compliance with tax and commercial law. Zahly is a tool and does not replace tax or legal advice.

Zahly supports the technical GoBD requirements for immutability and traceability (immutable archiving, cancellation documents instead of deletion, automatic 8-year retention). A formal certification under IDW PS 880 does not exist. Compliance with the retention, record-keeping and filing obligations applicable to you remains your responsibility.

Data backup: customers, quotes, drafts and settings are stored exclusively on your device. You are responsible for backing them up; we expressly recommend setting up the backup folder provided in the app (e.g. iCloud Drive, OneDrive, Dropbox). Without it, this data cannot be recovered if the device is lost.

9. Availability

Zahly is designed as an offline application and works at its core without an internet connection. An internet connection is required for account sign-in, automatic updates and the cloud archive. We aim for high availability of these server-side services but do not owe a specific availability rate. Maintenance work will be announced in advance where possible.

10. Warranty and liability

The statutory warranty rights apply; for contracts with consumers about digital products, in particular sections 327 et seq. of the German Civil Code (BGB).

We are liable without limitation for intent and gross negligence, for injury to life, body or health, under the Product Liability Act, and to the extent of a guarantee given. In the case of slightly negligent breach of a material contractual obligation (an obligation whose fulfilment makes the proper performance of the contract possible in the first place and on whose observance you may regularly rely), liability is limited to the foreseeable damage typical for this type of contract. Liability is otherwise excluded.

For loss of data we are liable only to the extent that would have arisen had you carried out proper and regular data backups (see section 8).

11. Privacy

Information on the processing of personal data can be found in our Privacy Policy.

12. Changes to these Terms

We may adjust these Terms where this is necessary for legal or technical reasons, or to reflect changed services, and where the change does not unreasonably disadvantage you. We will inform you of changes by e-mail at least 30 days in advance. If you do not object before they take effect, the changes are deemed accepted; we will point this out separately. If you object, you may terminate the contract with effect from the date the change takes effect.

13. Final provisions

German law applies, excluding the UN Convention on Contracts for the International Sale of Goods. If you are a consumer with your habitual residence in the EU, the mandatory consumer protection provisions of your country of residence remain unaffected.

The European Commission provides a platform for online dispute resolution: ec.europa.eu/consumers/odr. We are neither obliged nor willing to participate in dispute resolution proceedings before a consumer arbitration board.

Should any provision of these Terms be invalid, the validity of the remaining provisions remains unaffected.