Help with the app
On the subscription screen, open account settings and choose Support. If the main interface is already available, use Profile → Account and app settings → Account and data → Support. Choose a category and describe the problem. The request is stored on the server and an administrator's reply appears in the same section. Include the app version, language, lesson, mission or game name, level and reproduction steps. Do not send your password. To contact us without signing in, email support@powersystemlab.net.
Cannot sign in
On the sign-in screen, tap Forgot password?, enter your account email and the six-digit code from the email, then choose a new password. The code expires after 15 minutes; another request is available after one minute. Check your spam folder. Sign in with the new password after the reset; your progress is preserved. If you cannot access your email or the problem continues, contact support. Ordinary registration does not require email confirmation.
Progress, games and connection
Your learning route, tasks, missions, repairs and game sessions are saved on the server in your account. New actions require a connection. After a network error, wait for connectivity and retry as indicated by the app. If a result is missing, include the time and level in your support request. Do not delete your account to solve a saving problem. In the native iOS app, calculator computations and ship clocks run on the device after access to the section is verified. Sign-in and current subscription checks require a connection; fully offline operation is not guaranteed. The web account requires a server connection and does not provide offline access to learning sections or tools.
New games
In Knowledge Tower, open the leaderboard to choose the week or all time. Touch and hold another player's row for Hide player and Report name. Contact support to change your own alias or visibility. Rankings require sign-in, access to the game and a connection; the result does not award learning XP. In Name the equipment, the first answer is saved and revision updates mastery. Answers sync when connected to the account; the current question is stored on the device. The photograph's source and license are available in the game.
Images, sound and notifications
Sound and animation settings are in Profile. Sea ambience does not use your microphone. Support messages can be enabled in account settings; delivery needs iOS notification permission. If permission was denied, open the system notification settings for Power System Lab. Messages may remain in Notification Center after delivery is disabled.
Data and account deletion
You can request access, a copy, correction or deletion through Support or support@powersystemlab.net, including without signing in. To delete within the app, open account settings from Profile or the subscription screen and choose Delete account. Enter your current password, tap Delete account and confirm Delete permanently. A server connection is required. Deletion is irreversible; signing out and resetting progression do not replace account deletion. The privacy policy explains working data and backup handling.
Subscription and payment
An active subscription is required for the main features after sign-in in the iOS app and at https://powersystemlab.net/app/ and https://powersystemlab.net/lab/, including for existing users. One subscription applies to the same Power System Lab account; no second payment is needed for the browser. The website does not offer card payment or another payment provider.
Three days free
For users eligible for Apple’s introductory offer, either plan starts with a 3-day free trial. You must subscribe and confirm through Apple immediately; registering a Power System Lab account alone does not start a trial or unlock the main features. Only one introductory offer can be used per Apple Account in this subscription group. Switching plans, reinstalling or creating another Power System Lab account does not provide another trial. Apple determines eligibility; if the offer is unavailable, the selected paid period starts without free days. Check the offer and price in Apple’s system sheet before confirming. After the trial, the selected paid period starts automatically at US$4.99 per month or US$39.99 per year in the US storefront, unless you cancel renewal in time. The annual amount is charged upfront; actual price and currency depend on your storefront. To avoid a charge after the trial, cancel through Apple at least 24 hours before it ends. Access after cancellation follows Apple’s verified status; remaining free days are not guaranteed.
Purchasing and restoring require an iOS app version that supports subscriptions. If your installed version cannot make purchases, check the App Store for an update. While a compatible update is unavailable, the main features cannot be opened without an active subscription. Sign-in, legal documents, support, account management and account deletion are available without a purchase. Current update availability is published at https://powersystemlab.net/; timing depends on Apple review and publication.
The US storefront plans are set at US$4.99 per month or US$39.99 per year, with the year charged in full. Check the exact price and currency for your storefront in Apple’s system confirmation sheet.
Restore a purchase
In the iOS app, tap Restore Purchases on the subscription screen or in settings. Use the same Apple Account and Power System Lab account as for your purchase and check the connection. If a purchase is pending Apple's approval, wait for Apple's result; purchasing again will not speed up verification. If access is missing or the purchase is linked to another or deleted Power System Lab account, email support@powersystemlab.net. Do not send your Apple password, payment card number, CVV or verification codes. Automatic transfer of a purchase to a new Power System Lab account is not provided. If the app has already confirmed your subscription, sign into the same Power System Lab account in the browser and refresh the page. If the website still asks for a subscription, check the account email and connection, then contact support; a separate web purchase is not needed.
Cancellation and refunds
Manage and cancel automatic renewal at https://apps.apple.com/account/subscriptions . Apple handles refund requests at https://reportaproblem.apple.com/ . Canceling renewal normally preserves access until the paid period ends; an Apple refund or revocation may change it. If billing fails, check your Apple Account payment method; free access during a billing error is not promised.
Before account deletion
Deleting your account or the app does not cancel an Apple subscription. Cancel it separately if you do not want further charges. Immediate account deletion remains available in account settings, including from the subscription screen, without purchasing or waiting for the paid period to end. Deletion removes the purchase's association with the former account; contact support about restoring access rather than buying again.
Earlier data and web account
Former tests, rankings and On board are not part of the new interface. Contact support about earlier records, handovers and attachments. The web account at https://powersystemlab.net/app/ and https://powersystemlab.net/lab/ uses the same account and verified entitlement; its sections may differ from the native app. After the transition, its main features also require a subscription. Sign-in, password recovery, legal documents, support and account deletion do not require payment. You can email support@powersystemlab.net even when learning sections are unavailable.