diff --git a/my/core/__main__.py b/my/core/__main__.py
index 2de9537..c80bae3 100644
--- a/my/core/__main__.py
+++ b/my/core/__main__.py
@@ -100,20 +100,34 @@ def config_check(args):
 
 def modules_check(args):
     verbose = args.verbose
+    vw = '' if verbose else '; pass --verbose to print more information'
 
     from .util import get_modules
     for m in get_modules():
         try:
-            importlib.import_module(m)
+            mod = importlib.import_module(m)
         except Exception as e:
             # todo more specific command?
-            vw = '' if verbose else '; pass --verbose to print more information'
             warning(f'{color.RED}FAIL{color.RESET}: {m:<30} loading failed{vw}')
             if verbose:
                 tb(e)
+            continue
 
+        info(f'{color.GREEN}OK{color.RESET}  : {m:<30}')
+        stats = getattr(mod, 'stats', None)
+        if stats is None:
+            continue
+        try:
+            res = stats()
+        except Exception as ee:
+            warning(f'     - {color.RED}stats:{color.RESET}                      computing failed{vw}')
+            if verbose:
+                tb(ee)
         else:
-            info(f'{color.GREEN}OK{color.RESET}  : {m:<30}')
+            info(f'    - stats: {res}')
+
+
+
 
 
 def list_modules(args):
diff --git a/my/emfit/__init__.py b/my/emfit/__init__.py
index 2b8f5a8..93ea337 100755
--- a/my/emfit/__init__.py
+++ b/my/emfit/__init__.py
@@ -322,6 +322,12 @@ def by_night() -> Dict[date, Emfit]:
     return res
 
 
+def stats():
+    return {
+        'nights': len(by_night()),
+    }
+
+
 def main():
     for k, v in by_night().items():
         print(k, v.start, v.end)
diff --git a/my/foursquare.py b/my/foursquare.py
index ed55a24..a722b3a 100755
--- a/my/foursquare.py
+++ b/my/foursquare.py
@@ -90,3 +90,10 @@ def get_cid_map(bfile: str):
 
 def print_checkins():
     print(get_checkins())
+
+
+def stats():
+    from more_itertools import ilen
+    return {
+        'checkins': ilen(get_checkins()),
+    }
diff --git a/my/hypothesis.py b/my/hypothesis.py
index bacc51e..d3d95c2 100644
--- a/my/hypothesis.py
+++ b/my/hypothesis.py
@@ -69,6 +69,16 @@ def pages() -> List[Res[Page]]:
     return sort_res_by(_dal().pages(), key=lambda h: h.created)
 
 
+# todo not public api yet
+def stats():
+    # todo add 'last date' checks et
+    return {
+        # todo ilen
+        'highlights': len(highlights()),
+        'pages'     : len(pages()),
+    }
+
+
 def _main():
     for page in get_pages():
         print(page)
diff --git a/my/rss/feedbin.py b/my/rss/feedbin.py
index 5a2f117..4cd1b8d 100644
--- a/my/rss/feedbin.py
+++ b/my/rss/feedbin.py
@@ -40,3 +40,10 @@ def states() -> Iterable[SubscriptionState]:
         dt = isoparse(dts)
         subs = parse_file(f)
         yield dt, subs
+
+
+def stats():
+    from more_itertools import ilen, last
+    return {
+        'subscriptions': ilen(last(states())[1])
+    }
diff --git a/tests/foursquare.py b/tests/foursquare.py
index 040f56c..ae9612e 100644
--- a/tests/foursquare.py
+++ b/tests/foursquare.py
@@ -1,6 +1,7 @@
 from my.foursquare import get_checkins
 
 def test_checkins():
+    # todo reuse stats?
     checkins = get_checkins()
     assert len(checkins) > 100
     assert any('Victoria Park' in c.summary for c in checkins)
diff --git a/tox.ini b/tox.ini
index ba5ac70..9a724a3 100644
--- a/tox.ini
+++ b/tox.ini
@@ -17,7 +17,7 @@ commands =
     # TODO add; once I figure out porg depdencency?? tests/config.py
     # TODO run demo.py? just make sure with_my is a bit cleverer?
     # TODO e.g. under CI, rely on installing
-    hpi hello
+    hpi modules
 
 
 [testenv:demo]