diff --git a/NEWS.md b/NEWS.md
index fcd924e..3d27f6f 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,5 +1,7 @@
 # reactlog (development)
 
+- `reactlog_show()` now uses `shiny::reactlog()` as its default `log`, so `reactlog_show()` works with no arguments after running an app (#91)
+
 - Migrated project license from GPL-3 to the MIT License.
 
 - Documented that `reactlog_show()` passes `...` on to `reactlog_render()`, so `session_token` can be set from `reactlog_show()`. The docs used to say `...` was ignored (#120)
diff --git a/R/showReactLog.R b/R/showReactLog.R
index e0d360f..80650cd 100644
--- a/R/showReactLog.R
+++ b/R/showReactLog.R
@@ -35,7 +35,8 @@
 #' enabled, it's possible for any user of your app to see at least some
 #' of the source code of your reactive expressions and observers.
 #'
-#' @param log Log produced by shiny to be processed
+#' @param log Log produced by shiny to be processed. Defaults to
+#'   [shiny::reactlog()], the log recorded in the current R session.
 #' @param time A boolean that specifies whether or not to display the
 #' time that each reactive takes to calculate a result.
 #' @param ... Arguments passed on to `reactlog_render()`, such as `session_token`.
@@ -56,10 +57,10 @@
 #' runApp(app)
 #'
 #' # once app has closed, display reactlog
-#' shiny::reactlogShow()
+#' reactlog_show()
 #' }
 
-reactlog_show <- function(log, time = TRUE, ...) {
+reactlog_show <- function(log = shiny::reactlog(), time = TRUE, ...) {
   file <- reactlog_render(log, time = as.logical(time), ...)
   utils::browseURL(file)
 }
diff --git a/man/reactlog_show.Rd b/man/reactlog_show.Rd
index 43ce78d..b29d177 100644
--- a/man/reactlog_show.Rd
+++ b/man/reactlog_show.Rd
@@ -7,10 +7,11 @@
 \usage{
 reactlog_render(log, session_token = NULL, time = TRUE)
 
-reactlog_show(log, time = TRUE, ...)
+reactlog_show(log = shiny::reactlog(), time = TRUE, ...)
 }
 \arguments{
-\item{log}{Log produced by shiny to be processed}
+\item{log}{Log produced by shiny to be processed. Defaults to
+\code{\link[shiny:reactlog]{shiny::reactlog()}}, the log recorded in the current R session.}
 
 \item{session_token}{token to be used to subset which session is displayed.
 Defaults to all sessions.}
@@ -68,7 +69,7 @@ app <- system.file("examples/01_hello", package = "shiny")
 runApp(app)
 
 # once app has closed, display reactlog
-shiny::reactlogShow()
+reactlog_show()
 }
 }
 \seealso{
diff --git a/tests/testthat/test-render.R b/tests/testthat/test-render.R
index 6568da8..a0fc4e0 100644
--- a/tests/testthat/test-render.R
+++ b/tests/testthat/test-render.R
@@ -17,3 +17,18 @@ test_that("reactlog_show() passes ... to reactlog_render()", {
   # no message match: "unused argument" is translated in other locales
   expect_error(reactlog_show(log, foo = 1))
 })
+
+test_that("reactlog_show() defaults to shiny::reactlog()", {
+  skip_if_not_installed("shiny")
+  called <- FALSE
+  local_mocked_bindings(
+    reactlog = function() {
+      called <<- TRUE
+      structure(list(), version = "1")
+    },
+    .package = "shiny"
+  )
+  local_mocked_bindings(browseURL = function(...) NULL, .package = "utils")
+  reactlog_show()
+  expect_true(called)
+})