Scope

This policy explains how Fuzhou KnockDream Technology Co., Ltd. handles information when you use Power. Power provides video velocity measurement, training records, 1RM estimates and strength training calculators.

Information Power processes

Content you select or enter

• Training videos you choose, plus frames, bar path, repetitions and velocity results produced during analysis.
• Exercise type, load, repetitions, sex, body weight, height, age, heart rate and other values you enter into calculators.
• Training records, 1RM results and load-velocity data points that you choose to save.

Information we do not collect

Power currently has no account system or advertising network. It does not collect precise location, contacts, advertising identifiers or activity across other apps.

Anonymous usage analytics after consent

Umeng Analytics initializes only if you explicitly choose “Agree and continue.” It then processes device model, operating-system and App version, network status, an anonymous device identifier, App launches and sessions, feature impressions and taps, purchase-funnel events and crash diagnostics. Power does not send Umeng training videos, exercise type, load, velocity, bar path, training records or calculator inputs.

Purchase information

If you open the Power Pro purchase screen, buy a product or restore purchases, RevenueCat processes an App-generated anonymous customer identifier, product and entitlement status, purchase receipt or Google purchase token, transaction dates, renewal status, locale and basic device or App technical information. Power does not ask for your name, email address or payment-card details.

Processing and storage

Video decoding, barbell tracking, velocity calculation and path generation happen on your device. Training videos are not uploaded to our servers. Analysis results and records you save remain in the App's local storage.

If you export an annotated video, the exported file is saved to the system photo library only after your action. The original video remains managed by the app or library where you selected it.

Purchase information is transmitted using encrypted connections to RevenueCat so Power can validate Store transactions, prevent purchase fraud, restore access and provide Power Pro entitlements. RevenueCat also provides aggregated subscription and purchase analytics to us. Training videos, strength results and calculator inputs are never sent to RevenueCat.

If you consent to anonymous analytics, device and App technical information, feature-usage events and diagnostics are transmitted over encrypted connections to Umeng so we can understand feature usage and improve the membership funnel. These data are not used for advertising or cross-app tracking.

System permissions

• Photo or file access: the system picker provides only the training video you explicitly select.
• Add to photo library: used only when you choose to save an annotated analysis video.

You can change these permissions in iOS or Android Settings. Denying a permission affects only the related selection or export feature.

Sharing, sale and tracking

We do not sell personal data, provide training videos or records to advertisers, or use this content to track you across apps or websites.

Power uses operating-system and Flutter runtime frameworks to provide App features. The App does not use these frameworks to upload your training content.

Apple App Store or Google Play processes your payment when you choose Power Pro. RevenueCat acts as our subscription-management service provider and receives purchase history, transaction identifiers and an anonymous App customer identifier for App functionality, fraud prevention and subscription analytics. RevenueCat does not receive your training videos or fitness records, and this information is not used for advertising or cross-app tracking.

After your consent, Umeng Tongxin (Beijing) Technology Co., Ltd. acts as our analytics provider and processes anonymous device, App-usage and diagnostic information. Umeng privacy policy: https://www.umeng.com/page/policy.

Retention and deletion

Training records stay on your device until you delete them in Power or uninstall the App. Files exported to Photos must be managed in the system Photos app.

Purchase records are retained by Apple or Google under their policies and by RevenueCat as needed to maintain entitlements, prevent fraud and provide purchase history. You may email us to request deletion of the RevenueCat customer record associated with your anonymous App User ID; Store transaction records may remain where required by the Store or law.

Umeng retains analytics data under its privacy policy. You may contact the email address below to request access to or deletion of analytics data associated with this App.

Your choice

On first use, you may consent to anonymous usage analytics or choose “Continue without analytics.” Declining analytics does not affect video analysis, training records, calculators or Power Pro, and the Umeng SDK does not initialize before consent.

To withdraw consent or request access to or deletion of analytics data, email aaronx@knockdream.com. We will stop subsequent custom analytics events and assist with your data request.

Children

Power is not designed for children and does not create child profiles. Minors should perform strength training with a guardian or qualified coach and should not treat calculator results as medical advice.

Changes to this policy

If Power materially changes how it handles data, we will update this page and the date above. New collection or uses will be explained and presented with any choices required by applicable rules.

Contact

For questions about this policy, local App data or permissions, email aaronx@knockdream.com.

Operator: Fuzhou KnockDream Technology Co., Ltd.