diff --git a/README.md b/README.md
index 4bd56b8..6e453d9 100644
--- a/README.md
+++ b/README.md
@@ -237,7 +237,7 @@ In interactive mode, it also asks the user whether they want to download and ins
 ```
 #DC#
 
-configVerCode=202207160
+configVerCode=202207170
 
 capacity=(-1 60 70 75 false false)
 
@@ -270,8 +270,6 @@ prioritizeBattIdleMode=false
 currentWorkaround=false
 battStatusWorkaround=true
 
-schedule=''
-
 battStatusOverride=''
 
 rebootResume=false
@@ -284,8 +282,6 @@ forceOff=
 
 tempLevel=0
 
-: one-line script sample; echo nothing >/dev/null
-
 
 # WARNINGS
 
@@ -351,10 +347,6 @@ tempLevel=0
 
 # battStatusWorkaround=batt_status_workaround=BOOLEAN
 
-# schedule=sched='HHMM COMMAND...
-# HHMM COMMAND...
-# ...' NULLABLE
-
 # battStatusOverride=batt_status_override=Idle|Discharging|'code to PRINT value for _status' NULLABLE
 
 # rebootResume=reboot_resume=BOOLEAN
@@ -411,8 +403,6 @@ tempLevel=0
 # cw current_workaround
 # bsw batt_status_workaround
 
-# sd sched
-
 # bso batt_status_override
 # rr reboot_resume
 # dp discharge_polarity
@@ -554,29 +544,6 @@ tempLevel=0
 # On the other hand, the user may observe charging control inconsistencies on devices that report wrong current values or major current fluctuations.
 # Oftentimes, charging control issues are related to the power adapter.
 
-# sched (sd) #
-# Command/script schedules, in the following format:
-#
-# sched="HHMM command...
-# HHMM command...
-# ..."
-#
-# e.g., 3900 mV at 22:00, and 4100 mV at 6:00, daily:
-# sched="2200 acc -s mcv=3900
-# 0600 acc -s mcv=4100"
-#
-# 12 hour format is not supported.
-# Each schedule must be on its own line.
-# Each line is daemonized.
-# This is not limited to acc commands. It can run anything.
-#
-# Commands:
-#   -s|--set [sd|sched]="[+-]schedule to add or pattern to delete"
-#     e.g.,
-#       acc -s sd=-2050 (delete schedules that match 2050)
-#       acc -s sd="+2200 acc -s mcv=3900 mcc=500; acc -n "Switched to \"sleep\" profile" (append schedule)
-#     Note: "acc -s sd=" behaves just like similar commands (restores default value; for schedules, it's null)
-
 # batt_status_override (bso) #
 # Overrides the battery status determined by the not_charging function.
 # It can be Idle, Discharging (both case sensitive), or logic to PRINT the desired value for the _status variable.
@@ -602,6 +569,8 @@ tempLevel=0
 # All script lines are executed whenever the config is loaded/sourced.
 # This happens regularly while the daemon is running, and at least once per command run.
 # Warning: all files used in one-line scripts must reside somewhere in /data/adb/, just like acc's own data files.
+# One can schedule tasks with the following construct:
+# : sleep profile; at 22:00 "acc -s pc=50 mcc=500 mcv=3900; acc -n 'Switched to night profile'"
 
 # off_mid (om) #
 # Whether to turn off charging after rebooting or restarting accd, if capacity is within resume_capacity and pause_capacity (default: true).
@@ -682,6 +651,11 @@ Options
       acc -c less
       acc -c cat
 
+  -c|--config a|d string|regex   Append (a) or delete (d) string/pattern to/from config
+    e.g.,
+      acc -c a ": sleep profile; at 22:00 acc -s pc=50 mcc=500 mcv=3900" (append a schedule)
+      acc -c d sleep (remove all lines matching "sleep")
+
   -d|--disable [#%, #s, #m, #h or #mv (optional)]   Disable charging
     e.g.,
       acc -d 70% (do not recharge until capacity <= 70%)
@@ -762,12 +736,6 @@ Options
       acc -s "charging_switch=battery/charging_enabled 1 0" resume_capacity=55 pause_capacity=60
     Note: all properties have short aliases for faster typing; run "acc -c cat" to see them
 
-  -s|--set [sd|sched]="[+-]schedule to add or pattern to delete"
-    e.g.,
-      acc -s sd=-2050 (delete schedules that match 2050)
-      acc -s sd="+2200 acc -s mcv=3900 mcc=500; acc -n "Switched to \"sleep\" profile" (append schedule)
-    Note: "acc -s sd=" behaves just like similar commands (restores default value; for schedules, it's null)
-
   -s|--set c|--current [milliamps|-]   Set/print/restore_default max charging current (range: 0-9999 Milliamps)
     e.g.,
       acc -s c (print current limit)
@@ -886,9 +854,10 @@ Tips
   Commands can be chained for extended functionality.
     e.g., charge for 30 minutes, pause charging for 6 hours, charge to 85% and restart the daemon
     acc -e 30m && acc -d 6h && acc -e 85 && accd
+  One can take advantage of one-line scripts and the built-in "at" function to schedule profiles (refer back to -c|--config).
 
   Sample profile
-    acc -s pc=60 rc=55 mcc=500 mcv=3900
+    acc -s pc=60 mcc=500 mcv=3900
       This keeps battery capacity between 55-60%, limits charging current to 500 mA and voltage to 3900 millivolts.
       It's great for nighttime and "forever-plugged".
 
diff --git a/install/acc.sh b/install/acc.sh
index 697858f..da12411 100644
--- a/install/acc.sh
+++ b/install/acc.sh
@@ -100,7 +100,15 @@ edit() {
   local file="$1"
   shift
   if [ -n "${1-}" ]; then
-    IFS="$(printf ' \t\n')" eval "$* $file"
+    if [ "$1" = a ]; then
+      shift
+      echo >> $file
+      echo "$@" >> $file
+    elif [ "$1" = d ]; then
+      sed -Ei "\#$2#d" $file
+    else
+      IFS="$(printf ' \t\n')" eval "$* $file"
+    fi
   else
     ! ${verbose:-true} || {
       case $file in
diff --git a/install/acca.sh b/install/acca.sh
index 510b261..e57a214 100644
--- a/install/acca.sh
+++ b/install/acca.sh
@@ -1,9 +1,12 @@
 #!/system/bin/sh
 # acca: acc for front-ends (faster and more efficient than acc)
-# Copyright 2020, VR25
+# Copyright 2020-2022, VR25
 # License: GPLv3+
 
 
+at() { :; }
+
+
 daemon_ctrl() {
   case "${1-}" in
     start|restart)
diff --git a/install/accd.sh b/install/accd.sh
index 815ad48..1f3068f 100644
--- a/install/accd.sh
+++ b/install/accd.sh
@@ -121,20 +121,7 @@ if ! $init; then
       capacitySync=false
     fi
 
-    # schedules and custom loops
-      (set +eu
-
-      schedTime=$(date +%H%M)
-      schedScript=$TMPDIR/.${schedTime}_schedScript.sh
-      if [ ! -f $schedScript ] && echo "${schedules-}" | grep "$schedTime " >/dev/null; then
-        echo "$schedules" | sed -n "s|^$schedTime |#!/system/bin/sh\n|p" > $schedScript
-        echo "sleep 60; rm $schedScript; exit" >> $schedScript
-        chmod +x $schedScript
-        start-stop-daemon -bx $schedScript -S --
-      fi
-
-      set +x
-      eval '${loopCmd-}') || :
+    (set +eu; eval '${loopCmd-}') || :
 
     # shutdown if battery temp >= shutdown_temp
     [ $(cat $temp) -lt $(( ${temperature[3]} * 10 )) ] || shutdown
diff --git a/install/default-config.txt b/install/default-config.txt
index a14da3c..f018654 100644
--- a/install/default-config.txt
+++ b/install/default-config.txt
@@ -1,4 +1,4 @@
-configVerCode=202207160
+configVerCode=202207170
 
 capacity=(-1 60 70 75 false false)
 
@@ -31,8 +31,6 @@ prioritizeBattIdleMode=false
 currentWorkaround=false
 battStatusWorkaround=true
 
-schedule=''
-
 battStatusOverride=''
 
 rebootResume=false
@@ -45,8 +43,6 @@ forceOff=
 
 tempLevel=0
 
-: one-line script sample; echo nothing >/dev/null
-
 
 # WARNINGS
 
@@ -112,10 +108,6 @@ tempLevel=0
 
 # battStatusWorkaround=batt_status_workaround=BOOLEAN
 
-# schedule=sched='HHMM COMMAND...
-# HHMM COMMAND...
-# ...' NULLABLE
-
 # battStatusOverride=batt_status_override=Idle|Discharging|'code to PRINT value for _status' NULLABLE
 
 # rebootResume=reboot_resume=BOOLEAN
@@ -172,8 +164,6 @@ tempLevel=0
 # cw current_workaround
 # bsw batt_status_workaround
 
-# sd sched
-
 # bso batt_status_override
 # rr reboot_resume
 # dp discharge_polarity
@@ -315,29 +305,6 @@ tempLevel=0
 # On the other hand, the user may observe charging control inconsistencies on devices that report wrong current values or major current fluctuations.
 # Oftentimes, charging control issues are related to the power adapter.
 
-# sched (sd) #
-# Command/script schedules, in the following format:
-#
-# sched="HHMM command...
-# HHMM command...
-# ..."
-#
-# e.g., 3900 mV at 22:00, and 4100 mV at 6:00, daily:
-# sched="2200 acc -s mcv=3900
-# 0600 acc -s mcv=4100"
-#
-# 12 hour format is not supported.
-# Each schedule must be on its own line.
-# Each line is daemonized.
-# This is not limited to acc commands. It can run anything.
-#
-# Commands:
-#   -s|--set [sd|sched]="[+-]schedule to add or pattern to delete"
-#     e.g.,
-#       acc -s sd=-2050 (delete schedules that match 2050)
-#       acc -s sd="+2200 acc -s mcv=3900 mcc=500; acc -n "Switched to \"sleep\" profile" (append schedule)
-#     Note: "acc -s sd=" behaves just like similar commands (restores default value; for schedules, it's null)
-
 # batt_status_override (bso) #
 # Overrides the battery status determined by the not_charging function.
 # It can be Idle, Discharging (both case sensitive), or logic to PRINT the desired value for the _status variable.
@@ -363,6 +330,8 @@ tempLevel=0
 # All script lines are executed whenever the config is loaded/sourced.
 # This happens regularly while the daemon is running, and at least once per command run.
 # Warning: all files used in one-line scripts must reside somewhere in /data/adb/, just like acc's own data files.
+# One can schedule tasks with the following construct:
+# : sleep profile; at 22:00 "acc -s pc=50 mcc=500 mcv=3900; acc -n 'Switched to night profile'"
 
 # off_mid (om) #
 # Whether to turn off charging after rebooting or restarting accd, if capacity is within resume_capacity and pause_capacity (default: true).
diff --git a/install/misc-functions.sh b/install/misc-functions.sh
index 2f54ed5..f074dc1 100644
--- a/install/misc-functions.sh
+++ b/install/misc-functions.sh
@@ -49,6 +49,24 @@ apply_on_plug() {
 }
 
 
+at() {
+  local one=$1
+  local time=$(date +%H:%M)
+  local file=$TMPDIR/schedules/$one
+  shift
+  if [ ! -f $file ] && [ ${one#0} = ${time#0} ]; then
+    mkdir -p ${file%/*}
+    echo "#!/system/bin/sh
+      sleep 60
+      rm $file
+      exit" > $file
+    chmod u+x $file
+    start-stop-daemon -bx $file -S --
+    eval "$@"
+  fi
+}
+
+
 calc() {
   awk "BEGIN {print $*}" | tr , .
 }
diff --git a/install/oem-custom.sh b/install/oem-custom.sh
index 0e9ef5e..fe88664 100644
--- a/install/oem-custom.sh
+++ b/install/oem-custom.sh
@@ -7,8 +7,9 @@ if (set +x; . $config) > /dev/null 2>&1; then
   configVer=0$(_get_prop configVerCode)
   defaultConfVer=0$(cat $TMPDIR/.config-ver)
   [ $configVer -eq $defaultConfVer ] || {
-    if [ $configVer -lt 202207160 ]; then
+    if [ $configVer -lt 202207170 ]; then
       rm $dataDir/logs/write.log 2>/dev/null || :
+      sed -i '/^: one-line script sample/d' $config
       $TMPDIR/acca --set force_off=false
     else
       $TMPDIR/acca --set dummy=
diff --git a/install/print-config.sh b/install/print-config.sh
index 5994e43..871f00d 100644
--- a/install/print-config.sh
+++ b/install/print-config.sh
@@ -45,8 +45,6 @@ prioritize_batt_idle_mode=$prioritizeBattIdleMode
 current_workaround=$currentWorkaround
 batt_status_workaround=$battStatusWorkaround
 
-sched='$schedule'
-
 batt_status_override='$battStatusOverride'
 
 reboot_resume=$rebootResume
@@ -57,7 +55,6 @@ off_mid=$offMid
 
 force_off=$forceOff
 
-temp_level=$tempLevel
-"
+temp_level=$tempLevel"
 
-sed -n '/^: /p' $config
+sed -n 's/^: /\n: /p' $config
diff --git a/install/strings.sh b/install/strings.sh
index 3a4cd02..7b21b93 100644
--- a/install/strings.sh
+++ b/install/strings.sh
@@ -123,6 +123,11 @@ Options
       acc -c less
       acc -c cat
 
+  -c|--config a|d string|regex   Append (a) or delete (d) string/pattern to/from config
+    e.g.,
+      acc -c a ": sleep profile; at 22:00 acc -s pc=50 mcc=500 mcv=3900" (append a schedule)
+      acc -c d sleep (remove all lines matching "sleep")
+
   -d|--disable [#%, #s, #m, #h or #mv (optional)]   Disable charging
     e.g.,
       acc -d 70% (do not recharge until capacity <= 70%)
@@ -203,12 +208,6 @@ Options
       acc -s "charging_switch=battery/charging_enabled 1 0" resume_capacity=55 pause_capacity=60
     Note: all properties have short aliases for faster typing; run "acc -c cat" to see them
 
-  -s|--set [sd|sched]="[+-]schedule to add or pattern to delete"
-    e.g.,
-      acc -s sd=-2050 (delete schedules that match 2050)
-      acc -s sd="+2200 acc -s mcv=3900 mcc=500; acc -n "Switched to \"sleep\" profile" (append schedule)
-    Note: "acc -s sd=" behaves just like similar commands (restores default value; for schedules, it's null)
-
   -s|--set c|--current [milliamps|-]   Set/print/restore_default max charging current (range: 0-9999$(print_mA))
     e.g.,
       acc -s c (print current limit)
@@ -327,9 +326,10 @@ Tips
   Commands can be chained for extended functionality.
     e.g., charge for 30 minutes, pause charging for 6 hours, charge to 85% and restart the daemon
     acc -e 30m && acc -d 6h && acc -e 85 && accd
+  One can take advantage of one-line scripts and the built-in "at" function to schedule profiles (refer back to -c|--config).
 
   Sample profile
-    acc -s pc=60 rc=55 mcc=500 mcv=3900
+    acc -s pc=60 mcc=500 mcv=3900
       This keeps battery capacity between 55-60%, limits charging current to 500 mA and voltage to 3900 millivolts.
       It's great for nighttime and "forever-plugged".
 
@@ -523,7 +523,8 @@ print_acct_info() {
 
 print_panic() {
   printf "\nWARNING: experimental feature, dragons ahead!
-Some problematic control files are blacklisted automatically, based on known patterns.
+Some problematic control files are excluded, based on known patterns.
+Control files that trigger a reboot are automatically blacklisted.
 Do you want to see/edit the list of potential switches before testing?
 a: abort operation | n: no | y: yes (default) "
 }
@@ -534,6 +535,6 @@ print_resume() {
   Waiting for charging to resume...
   If it doesn't happen after a few seconds, try re-plugging the charger.
   If it's taking too long, unplug the charger, stop the test with CTRL-C, run accd -i, wait a few seconds, and retest.
-  In extreme cases, one shall comment out (blacklist) this switch in $dataDir/logs/write.log, reboot, and re-run the test.
+  In extreme cases, one shall comment out (blacklist) this switch in $dataDir/logs/write.log, reboot (to enable charging), and re-run the test.
   ##########"
 }
diff --git a/install/write-config.sh b/install/write-config.sh
index 808182e..4f33987 100644
--- a/install/write-config.sh
+++ b/install/write-config.sh
@@ -44,8 +44,6 @@ cw=${current_workaround-${cw-$currentWorkaround}}
 
 bsw=${batt_status_workaround-${bsw-$battStatusWorkaround}}
 
-sd=${sched-${sd-$schedule}}
-
 bso="${batt_status_override-${bso-$battStatusOverride}}"
 
 rr="${reboot_resume-${rr-$rebootResume}}"
@@ -59,17 +57,11 @@ fo="${force_off-${fo-$forceOff}}"
 tl="${temp_level-${tl-$tempLevel}}"
 
 
-# schedule -- append/delete
-case "$sd" in
-  +*)
-    sd="${schedule-}
-${sd#+}"
-    sd="$(echo "$sd" | sed '/^$/d')"
-  ;;
-  -*)
-    sd="$(echo "${schedule-}" | sed "\%${sd#-}%d")"
-  ;;
-esac
+# backup scripts
+touch $TMPDIR/.scripts
+grep '^: ' $config > $TMPDIR/.scripts 2>/dev/null || :
+sed -i 's/^: /\n: /' $TMPDIR/.scripts
+printf "\n\n" >> $TMPDIR/.scripts
 
 
 # enforce valid pc and rc difference
@@ -78,13 +70,6 @@ esac
 }
 
 
-# backup scripts
-! grep '^: ' $config > $TMPDIR/.scripts 2>/dev/null && echo > $TMPDIR/.scripts || {
-  sed -i '/: one-line script sample/d; /:/s/$/\n/' $TMPDIR/.scripts
-  echo >> $TMPDIR/.scripts
-}
-
-
 echo "configVerCode=$(cat $TMPDIR/.config-ver)
 
 capacity=(${sc:--1} ${cc:-60} ${rc:-70} ${pc:-75} ${cs:-false} ${cm:-false})
@@ -118,8 +103,6 @@ prioritizeBattIdleMode=${pbim:-false}
 currentWorkaround=${cw:-false}
 battStatusWorkaround=${bsw:-true}
 
-schedule='$sd'
-
 battStatusOverride='$bso'
 
 rebootResume=${rr:-false}
@@ -130,10 +113,8 @@ offMid=${om:-true}
 
 forceOff=${fo:-false}
 
-tempLevel=${tl:-0}
-
-: one-line script sample; echo nothing >/dev/null
-" > $config
+tempLevel=${tl:-0}" > $config
 
 cat $TMPDIR/.scripts $TMPDIR/.config-help >> $config
+rm $TMPDIR/.scripts
 set -u