Privacy Policy
Last updated: August 29, 2026
Sifria is a reading companion and library management app made by Larso Labs, LLC, a limited liability company based in Wyoming, United States ("Larso Labs", "we", "us"). This policy explains what information we collect through the Sifria app and the sifria.app website, how we use it, and the choices you have. The short version: your library lives on your device first, we sync it so you don't lose it, we don't sell your data, and we show no ads.
Information we collect
Account information
When you create an account you may provide an email address (for email sign-in), or sign in with Google or Apple, which share your name and email address with us. A display name and profile photo are optional. You can use parts of the service without an account where available; account features exist so your library can follow you across devices.
Your reading data
The content you create in Sifria: the books on your shelves, reading statuses and progress, ratings, reviews, saved quotes, notes, reading sessions and timers, streaks, collections, wishlists, and cover photos you take. This data is stored on your device first and synced to our servers so it can be backed up and shared across your devices.
Book searches
When you search the catalog or scan a barcode, your query (title, author, or ISBN) is sent to our servers to find the book. Catalog results are provided through licensed third-party book databases. Like the rest of your activity in the app, searches may be used to personalize your experience — for example, to recommend books we think you'll enjoy.
Usage and diagnostic data
We collect anonymous usage data — such as which features are used and how often — to understand what is working and improve the quality of the service. We also collect diagnostic information (crash reports, errors, app version, device model, operating system, and language) to keep the service stable. This data is not used to identify you.
What we do not collect
- No advertising identifiers, and no ads in the app.
- No precise location data.
- No access to your contacts, photos (beyond images you explicitly attach), or messages.
How we use information
- To provide the service: your library, sync, backups, and cross-device access.
- To personalize your experience: recommendations, suggestions, and features shaped by how you use the app.
- To keep the service stable: monitoring, diagnostics, and crash reporting.
- To improve the product using aggregated, anonymous usage patterns.
- To communicate with you about your account or respond to support requests.
- To comply with legal obligations.
We do not sell your personal information, and we do not use it for third-party advertising.
Service providers
We use a small number of third-party services to run Sifria. They process data on our behalf, under agreements that limit their use of it to providing the service:
- Cloud database and authentication — hosts synced libraries and account sign-in.
- Error monitoring — receives crash and error reports so we can fix problems.
- Book catalog providers — power book search; they receive search queries but no account data.
- Sign-in providers (Google, Apple) — if you choose to sign in with them, subject to their own privacy policies.
- App stores (Apple App Store, Google Play) — distribution, and their own analytics per your device settings.
A current list of our processors is available on request.
Deal finder and affiliate links
A future version of Sifria may include a deal finder that helps you find and buy books on your wishlist from third-party retailers. If you open a retailer through Sifria and make a purchase, we may earn a small commission from the referral. Retailers do not receive your account information or the contents of your library from us — only the referral link you chose to follow. Purchases are made with the retailer, under the retailer's own terms and privacy policy.
Sharing
We share personal information only:
- With the service providers listed above, to operate the service.
- When you choose to share — for example, share cards or a public shelf you enable.
- If required by law, legal process, or to protect the rights and safety of users.
- As part of a merger, acquisition, or sale of assets, in which case this policy continues to apply.
Data retention and deletion
We keep your data for as long as your account exists. You can delete your account from the app's settings or by emailing us; deletion removes your personal data and reading data from our servers within 30 days, except where the law requires us to keep certain records. Data stored only on your device is removed when you delete the app. Anonymous, aggregated data that cannot identify you may be retained.
Security
Data is encrypted in transit, access to production systems is restricted, and we follow industry-standard practices to protect your information. No system is perfectly secure; if a breach affects your personal data, we will notify you as required by law.
International transfers
Our servers are located in the United States. If you use Sifria from outside the U.S., your data is transferred to and processed in the U.S. Where required (for example, for users in the European Economic Area or the United Kingdom), we rely on appropriate safeguards such as standard contractual clauses.
Your rights
Depending on where you live, you may have the right to access, correct, export, or delete your personal data, to object to or restrict certain processing, and to lodge a complaint with your local data protection authority. California residents have the rights described in the CCPA, including the right to know and the right to delete; we do not sell personal information as defined by that law. To exercise any of these rights, email us at hi@sifria.app — we respond to all verified requests within the timelines the law requires.
Children
Sifria is not directed at children under 13, and we do not knowingly collect personal information from them. If you believe a child has provided us personal information, contact us and we will delete it.
Changes to this policy
We may update this policy as the service evolves. Material changes will be announced in the app or by email before they take effect, and the "Last updated" date above always reflects the current version.
Contact
Larso Labs, LLC · Wyoming, United States
hi@sifria.app