diff --git a/ui/src/app/models/app-types.ts b/ui/src/app/models/app-types.ts
index c0162347d..d7479d08b 100644
--- a/ui/src/app/models/app-types.ts
+++ b/ui/src/app/models/app-types.ts
@@ -46,6 +46,7 @@ export interface AppInstalledFull extends AppInstalledPreview {
   lastBackup: string | null
   configuredRequirements: AppDependency[] | null // null if not yet configured
   hasFetchedFull: boolean
+  startAlert?: string
   uninstallAlert?: string
   restoreAlert?: string
   actions: Actions
diff --git a/ui/src/app/pages/apps-routes/app-installed-show/app-installed-show.page.html b/ui/src/app/pages/apps-routes/app-installed-show/app-installed-show.page.html
index 8a5220bb9..40d1b903a 100644
--- a/ui/src/app/pages/apps-routes/app-installed-show/app-installed-show.page.html
+++ b/ui/src/app/pages/apps-routes/app-installed-show/app-installed-show.page.html
@@ -74,7 +74,7 @@
           <ion-button  *ngIf="vars.status === AppStatus.BROKEN_DEPENDENCIES" expand="block" fill="outline" (click)="scrollToRequirements()">
             Fix
           </ion-button>
-          <ion-button *ngIf="vars.status === AppStatus.STOPPED" expand="block" fill="outline" (click)="start()">
+          <ion-button *ngIf="vars.status === AppStatus.STOPPED" expand="block" fill="outline" (click)="tryStart()">
             Start
           </ion-button>
         </ion-label>
diff --git a/ui/src/app/pages/apps-routes/app-installed-show/app-installed-show.page.ts b/ui/src/app/pages/apps-routes/app-installed-show/app-installed-show.page.ts
index 00743087c..bbf155dbe 100644
--- a/ui/src/app/pages/apps-routes/app-installed-show/app-installed-show.page.ts
+++ b/ui/src/app/pages/apps-routes/app-installed-show/app-installed-show.page.ts
@@ -286,15 +286,13 @@ export class AppInstalledShowPage extends Cleanup {
     }).catch(e => this.setError(e))
   }
 
-  async start (): Promise<void> {
+  async tryStart (): Promise<void> {
     const app = peekProperties(this.app)
-    this.loader.of({
-      message: `Starting ${app.title}...`,
-      spinner: 'lines',
-      cssClass: 'loader',
-    }).displayDuringP(
-      this.apiService.startApp(this.appId),
-    ).catch(e => this.setError(e))
+    if (app.startAlert) {
+      this.presentAlertStart(app)
+    } else {
+      this.start(app)
+    }
   }
 
   async presentModalBackup (type: 'create' | 'restore') {
@@ -387,6 +385,36 @@ export class AppInstalledShowPage extends Cleanup {
     return await popover.present()
   }
 
+  private async presentAlertStart (app: AppInstalledFull): Promise<void> {
+    const alert = await this.alertCtrl.create({
+      header: 'Warning',
+      message: app.startAlert,
+      buttons: [
+        {
+          text: 'Cancel',
+          role: 'cancel',
+        },
+        {
+          text: 'Start',
+          handler: () => {
+            this.start(app)
+          },
+        },
+      ],
+    })
+    await alert.present()
+  }
+
+  private async start (app: AppInstalledFull): Promise<void> {
+    this.loader.of({
+      message: `Starting ${app.title}...`,
+      spinner: 'lines',
+      cssClass: 'loader',
+    }).displayDuringP(
+      this.apiService.startApp(this.appId),
+    ).catch(e => this.setError(e))
+  }
+
   private setError (e: Error): Observable<void> {
     this.$error$.next(e.message)
     return of()
diff --git a/ui/src/app/services/api/mock-app-fixures.ts b/ui/src/app/services/api/mock-app-fixures.ts
index 43c197112..0548044f9 100644
--- a/ui/src/app/services/api/mock-app-fixures.ts
+++ b/ui/src/app/services/api/mock-app-fixures.ts
@@ -53,6 +53,7 @@ export const bitcoinI: AppInstalledFull = {
   lanEnabled: true,
   title: 'Bitcoin Core',
   torAddress: '4acth47i6kxnvkewtm6q7ib2s3ufpo5sqbsnzjpbi7utijcltosqemad.onion',
+  startAlert: 'Bitcoind could take a loooooong time to start. Please be patient.',
   status: AppStatus.STOPPED,
   iconURL: 'assets/img/service-icons/bitcoind.png',
   instructions: 'some instructions',