diff --git a/README.md b/README.md
index 7d05bad..1e94ace 100644
--- a/README.md
+++ b/README.md
@@ -51,14 +51,6 @@ for that group:
 python compare.py <group_id>
 ```
 
-For a WinMerge-style side-by-side table, use:
-
-```bash
-python compareui.py <group_id> <time1> <time2>
-```
-
-It accepts the same optional `time1 time2` arguments as `compare.py`.
-
 ## Configuration
 
 | Variable | Description |
diff --git a/compareui.py b/compareui.py
deleted file mode 100644
index 464bfe6..0000000
--- a/compareui.py
+++ /dev/null
@@ -1,143 +0,0 @@
-import sys
-
-from compare import parse_args
-
-RESET = '\033[0m'
-YELLOW_BG = '\033[43m'
-BLACK = '\033[30m'
-DIVIDER = ' | '
-
-
-def main():
-    args = parse_args()
-
-    from common import diff_group_members, get_group_export, latest_two_group_exports
-
-    if args.times:
-        before_time, after_time = args.times
-        before_record = get_group_export(args.group_id, before_time)
-        after_record = get_group_export(args.group_id, after_time)
-        if before_record is None:
-            print(f'export not found for group {args.group_id} at {before_time}', file=sys.stderr)
-            return 1
-        if after_record is None:
-            print(f'export not found for group {args.group_id} at {after_time}', file=sys.stderr)
-            return 1
-    else:
-        before_record, after_record = latest_two_group_exports(args.group_id)
-        if before_record is None or after_record is None:
-            print(f'need at least 2 exports for group {args.group_id}', file=sys.stderr)
-            return 1
-
-    added, removed = diff_group_members(before_record, after_record)
-    print_compare_ui(args.group_id, before_record, after_record, added, removed)
-    return 0
-
-
-def print_compare_ui(group_id, before_record, after_record, added, removed):
-    title = after_record.get('title') or before_record.get('title') or ''
-    before_members = before_record.get('members', [])
-    after_members = after_record.get('members', [])
-    before_time = before_record.get('time')
-    after_time = after_record.get('time')
-    label = f'{title} ({group_id})' if title else str(group_id)
-
-    rows = side_by_side_rows(removed, added)
-    widths = table_widths(rows)
-    left_width = side_width(widths)
-    right_width = left_width
-
-    print(f'compare --telegram-group "{label}"')
-    print(
-        f'old: {before_time} ({len(before_members)} members)'.ljust(left_width)
-        + DIVIDER
-        + f'new: {after_time} ({len(after_members)} members)'.ljust(right_width)
-    )
-    print(
-        f'removed: {len(removed)}'.ljust(left_width)
-        + DIVIDER
-        + f'added: {len(added)}'.ljust(right_width)
-    )
-    print()
-    print(format_table_header(widths))
-    print(format_separator(widths))
-
-    for row in rows:
-        print(highlight(format_table_row(row, widths)))
-
-    if not added and not removed:
-        print('no membership changes.')
-
-
-def highlight(text):
-    if not sys.stdout.isatty():
-        return text
-    return f'{YELLOW_BG}{BLACK}{text}{RESET}'
-
-
-def side_by_side_rows(removed, added):
-    rows = []
-    max_count = max(len(removed), len(added))
-    for index in range(max_count):
-        left = member_columns(removed[index]) if index < len(removed) else empty_columns()
-        right = member_columns(added[index]) if index < len(added) else empty_columns()
-        rows.append((left, right))
-    return rows
-
-
-def member_columns(member):
-    username = member.get('username')
-    full_name = ' '.join(
-        part for part in [member.get('first_name'), member.get('last_name')]
-        if part
-    )
-    return [
-        str(member.get('id')),
-        f'@{username}' if username else '',
-        full_name,
-    ]
-
-
-def empty_columns():
-    return ['', '', '']
-
-
-def table_widths(rows):
-    widths = [2, 8, 4]
-    for left, right in rows:
-        for columns in (left, right):
-            for index, value in enumerate(columns):
-                widths[index] = max(widths[index], len(value))
-    return widths
-
-
-def side_width(widths):
-    return sum(widths) + 4
-
-
-def format_table_header(widths):
-    labels = ['ID', 'Username', 'Name']
-    left = format_columns(labels, widths)
-    right = format_columns(labels, widths)
-    return f'{left}{DIVIDER}{right}'
-
-
-def format_separator(widths):
-    return f'{"-" * side_width(widths)}-+-{"-" * side_width(widths)}'
-
-
-def format_table_row(row, widths):
-    left, right = row
-    return f'{format_columns(left, widths)}{DIVIDER}{format_columns(right, widths)}'
-
-
-def format_columns(columns, widths):
-    return (
-        f'{columns[0]:<{widths[0]}}  '
-        f'{columns[1]:<{widths[1]}}  '
-        f'{columns[2]:<{widths[2]}}'
-    )
-
-
-if __name__ == '__main__':
-    raise SystemExit(main())