diff --git a/android/app/src/main/kotlin/dev/yukart/display/MainActivity.kt b/android/app/src/main/kotlin/dev/yukart/display/MainActivity.kt
index 851c883..3cd6986 100644
--- a/android/app/src/main/kotlin/dev/yukart/display/MainActivity.kt
+++ b/android/app/src/main/kotlin/dev/yukart/display/MainActivity.kt
@@ -22,7 +22,7 @@ import io.flutter.plugin.common.MethodChannel
  *   When asked, the whole process is bound to the Ethernet (NCM) network while it
  *   exists, and unbound when it goes.
  *
- * Also a development hook: `am start -n dev.yukart.display/.MainActivity --es linktest <label>`
+ * Also a development hook: `am start -n dev.yukart.display/.MainActivity --es linktest <label>[@<host>]`
  * runs the link test (lib/linktest.dart) without touching the screen.
  */
 class MainActivity : FlutterActivity() {
diff --git a/lib/main.dart b/lib/main.dart
index 42eac52..528d7b1 100644
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -18,10 +18,14 @@ Future<void> main() async {
   await usb.bindFor(Uri.parse(defaultUrl));
   final boundary = Boundary(defaultUrl)..start();
   final linkTest = LinkTest(usb);
-  // Development hook: `am start ... --es linktest <label>` runs the test on the gateway's host.
-  Future<void> runLinkTest(String label) async {
+  // Development hook: `am start ... --es linktest <label>[@<host>]` runs the test,
+  // on the gateway's host unless one is given.
+  Future<void> runLinkTest(String request) async {
+    final at = request.indexOf('@');
+    final label = at < 0 ? request : request.substring(0, at);
+    final host = at < 0 ? Uri.parse(boundary.url).host : request.substring(at + 1);
     navigatorKey.currentState?.push(MaterialPageRoute<void>(builder: (_) => linkTestPage(boundary, linkTest, usb)));
-    await linkTest.run(Uri.parse(boundary.url).host, label);
+    await linkTest.run(host, label);
     await usb.bindFor(Uri.parse(boundary.url));
   }
 
diff --git a/tool/linktest_summary.py b/tool/linktest_summary.py
new file mode 100644
index 0000000..acebb08
--- /dev/null
+++ b/tool/linktest_summary.py
@@ -0,0 +1,32 @@
+#!/usr/bin/env python3
+"""Tabulate link-test runs from the Orin's results file: python3 linktest_summary.py [results.jsonl] [label...]"""
+import json
+import os
+import sys
+
+path = os.path.expanduser(sys.argv[1] if len(sys.argv) > 1 else "~/linktest/results.jsonl")
+labels = sys.argv[2:]
+runs = {}
+for line in open(path):
+    r = json.loads(line)
+    if "id" in r:
+        runs.setdefault(r["id"], []).append(r)
+
+for run_id, recs in runs.items():
+    if labels and not any(run_id.startswith(l + "-") for l in labels):
+        continue
+    print(f"\n== {run_id}")
+    for r in recs:
+        k = r["kind"]
+        if k in ("udp", "soak"):
+            print(f"  {k:5} {r['size']:>4} B {r['rate']:>3}/s {r['secs']:>2}s  loss {r['loss_pct']:>5}%  "
+                  f"rtt p50 {r['rtt_p50_ms']:>6} p99 {r['rtt_p99_ms']:>7} max {r['rtt_max_ms']:>7} ms  "
+                  f"gap {r['max_gap_ms']:>7} ms  sendfail {r['send_fails']}")
+        elif k in ("tcp_down", "tcp_up"):
+            print(f"  {k:8} {r['mb_s']:>6} MB/s over {r['secs']} s")
+        elif k in ("tcp_down_orin", "tcp_up_orin"):
+            print(f"  {k:13} retrans {r.get('retrans')}  rtt {r.get('rtt_ms')} ms  rto {r.get('rto_ms')} ms {r.get('error', '')}")
+        elif k == "error":
+            print(f"  ERROR {r['error']}")
+        elif k == "end":
+            print("  (complete)")