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Terms of Service

Terms of Service (ToS) for Kithora

Last updated: March 2026

1. Scope

These Terms of Service (hereinafter "ToS") govern the use of the mobile application "Kithora" (hereinafter "App"), provided by Arndt Lehmann (hereinafter "Provider" or "we"). By downloading and using the App, you agree to these ToS.

2. Service Description & Local-First Principle

Kithora is an application for organizing groups, trips, and projects. The App fundamentally differs from conventional cloud services:

  • Local-First: The App primarily stores data locally on the user's device. The user has full control over their data.
  • Encrypted Synchronization: The Provider operates a sync infrastructure that exclusively serves to synchronize encrypted data between the devices of a group ("Kora"). The servers cannot read the content.
  • Persistent Encrypted Storage: Encrypted data is stored on our servers to enable synchronization between devices and restoration on new devices. Since all data is end-to-end encrypted, the Provider has no access to the content.

3. Usage Rights & User Obligations

The Provider grants the user a simple, non-transferable right to use the App for private or business purposes in accordance with these ToS.

The user agrees to:

  • Not share content that violates applicable law, is offensive, or infringes copyright. Since communication is end-to-end encrypted, the Provider cannot moderate content but reserves the right to exclude users from the sync service in the event of known violations.
  • Keep their passphrase safe. The passphrase is the only way to access encrypted data. The Provider cannot recover lost passphrases and is not liable for data loss due to lost passphrases.

4. Subscriptions & Purchases

The basic version of the App ("Wanderer") is free. Advanced features can be unlocked through in-app purchases or subscriptions. Processing is handled through the respective app store (Apple App Store / Google Play Store).

4.1. Subscription Plans
  • Premium: A user-based subscription. It unlocks features such as unlimited Koras, AI usage, and HD media for the user, regardless of which Kora they are in.
  • Hero (Sponsorship): A subscription assigned to a specific Kora. As long as the subscription is active, all members within this Kora enjoy premium features (no counting against slot limits, HD media).
4.2. Duration, Renewal & Cancellation

Subscriptions are available as monthly or annual plans. Each subscription renews automatically for the selected period (month or year) unless cancelled at least 24 hours before the end of the current period.

  • Billing: Payment is processed through your Apple or Google account. The amount is charged upon purchase confirmation. For automatic renewals, the amount is charged within 24 hours before the end of the current period.
  • Cancellation: You can cancel your subscription at any time in the settings of your Apple or Google account. Cancellation takes effect at the end of the currently paid period. Already paid periods are not refunded on a pro-rata basis.
  • Effect of cancellation: Upon cancellation or payment failure, the user (or in the case of a "Hero" subscription, the sponsored Kora) loses access to premium features at the end of the paid period.
  • Subscription management: Subscriptions can only be managed through the respective app store (Apple: Settings → Apple ID → Subscriptions; Google: Play Store → Payments & subscriptions).

5. Right of Withdrawal (Widerrufsbelehrung)

5.1. Right of Withdrawal

If you are a consumer (§ 13 BGB, German Civil Code), you have a right of withdrawal of 14 days for distance contracts pursuant to §§ 312g, 355 BGB. The withdrawal period begins upon conclusion of the contract (completion of the subscription or in-app purchase).

To exercise your right of withdrawal, you must inform us of your decision to withdraw from the contract by means of a clear declaration (e.g., by email):

Arndt Lehmann
Glück-Auf-Straße 41, 09394 Hohndorf, Germany
Email: [email protected]

To meet the withdrawal deadline, it is sufficient to send the notification of the exercise of the right of withdrawal before the withdrawal period expires.

5.2. Consequences of Withdrawal

If you withdraw from the contract, we shall reimburse all payments we have received from you without undue delay and no later than 14 days from the day on which we received the notification of your withdrawal. Since payment processing is handled through the Apple App Store or Google Play Store, the refund will be processed through the respective store.

5.3. Premature Expiry of the Right of Withdrawal for Digital Content

The right of withdrawal expires prematurely for contracts for the provision of digital content that is not supplied on a tangible medium, if the Provider has begun to perform the contract after you as a consumer have expressly consented to the Provider beginning performance of the contract before the expiry of the withdrawal period, and you have confirmed your acknowledgment that by giving your consent you lose your right of withdrawal upon commencement of performance of the contract (§ 356(5) BGB).

When completing a subscription through the Apple App Store or Google Play Store, you are informed of the loss of the right of withdrawal as part of the purchase process and expressly consent to it.

5.4. Model Withdrawal Form

(If you wish to withdraw from the contract, please complete and return this form.)

To: Arndt Lehmann, Glück-Auf-Straße 41, 09394 Hohndorf, Germany, Email: [email protected]

I/We (*) hereby revoke the contract concluded by me/us (*) for the purchase of the following goods (*) / the provision of the following service (*):

Ordered on (*) / received on (*):
Name of the consumer(s):
Address of the consumer(s):
Date:

(*) Delete as appropriate.

6. Liability

Data Availability:

  • The Provider endeavors to keep the sync infrastructure available at all times. Due to the local-first architecture, all data remains locally available on the device even during server outages.
  • The Provider is not liable for data loss resulting from loss of passphrase, loss or damage to the device, or deletion of the App.

Limitation of Liability:

  • The Provider is liable without limitation for intent and gross negligence, as well as for injury to life, body, or health.
  • In the case of slight negligence, the Provider is only liable for breach of essential contractual obligations (cardinal obligations). Liability in this case is limited to the foreseeable, contract-typical damage.
  • Liability for data loss is excluded insofar as the damage could have been avoided through safe storage of the passphrase and regular use of the synchronization function.

7. Changes to the ToS & Services

We reserve the right to further develop the App and to change or remove features. We may change these ToS insofar as this is necessary for valid reasons (e.g., changes in legislation, introduction of new features). We will inform you of changes within the App.

8. Final Provisions

The law of the Federal Republic of Germany applies, excluding the UN Convention on Contracts for the International Sale of Goods. If the user is a consumer, mandatory protective provisions of the state in which the consumer has their habitual residence remain unaffected.

Should individual provisions of these ToS be invalid, the validity of the remaining provisions shall remain unaffected.

Contact Information:
Arndt Lehmann
Glück-Auf-Straße 41, 09394 Hohndorf, Germany
Email: [email protected]

Last updated: March 19, 2026