Contact
Email support@coinmadang.app with the web address or app version, browser or device details, affected screen, and displayed data time. Never send passwords or API keys.
Missing or delayed values
A metric may show unavailable or delayed because of provider, region, or network conditions. CoinMadang does not turn unknown values into zero or label delayed data as live.
Delete local data
Local app data also includes app-open ad display times and, in app versions with the 10-minute access pass, calculator access grant and expiry times. In-app “Reset display mode” restores only the default dark theme, and “Clear watchlist” removes only watchlist entries. To remove all local app data, use Android Settings → Apps → CoinMadang → Storage → Clear data, or uninstall the app. OS backup and restore, advertising identifiers and consent information are also subject to platform and SDK controls. On the web, clear site data and cookies in your browser; change web ad choices in its privacy/cookie settings or My Ad Center. The web community uses Google sign-in and stores account records, posts, comments and votes on the server. Contact support@coinmadang.app about access to or deletion of community accounts or materials or support emails. This does not mean those records have already been deleted; applicable records and retention reasons will be checked and explained.
Scope
CoinMadang is an informational web and app service. It does not provide trading, orders, a wallet, deposits, withdrawals, or financial advice.
Mobile ads and consent
The Android app includes app-open ads and rewarded ads for the calculator. App-open ads are skipped on first use and spaced at least 30 minutes apart; ad preparation failures do not block entry. In app versions with the 10-minute access pass, an accepted calculator reward grants 10 minutes of calculator access on the same device. Changing the coin or inputs and reopening the app preserves the remaining time. Earlier versions may behave differently. Expiry affects the next calculation and does not close an already displayed result. Closing the result clears the inputs and result. Closing an ad without a reward or failing to prepare an ad does not grant new access, and inputs are retained.
Google Mobile Ads SDK: The SDK may process IP addresses (to estimate general location), ad interactions, diagnostics and identifiers such as advertising ID and app set ID; data is encrypted in transit. The SDK initializes and requests ads only when UMP permits ad requests. Where applicable, change your choice through advertising privacy options in Settings.
For advertising access, only the access grant/expiry times and app-open ad display times are stored on the device. Calculator inputs and results are neither persistently stored nor sent to the ad SDK, data server, URLs, logs or analytics services. No Firebase Analytics, Crashlytics, banner or interstitial ads are added.
Ads may be unavailable during review. Do not include calculator inputs, private keys, recovery phrases or secrets in support requests.
Web favorites and settings
The web language, selected exchanges and favorites are stored only in your browser, without an account or cross-device sync. Clearing browser data removes them. Android advertising and permissions described below are separate from web features. Web comparisons, details and calculators do not require watching app ads.