diff --git a/CHANGELOG.md b/CHANGELOG.md
index aac7d88..c507468 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,8 @@
 - `version` subcommand [e6b24fe](https://git.autonomic.zone/coop-cloud/abra/commit/e6b24fe)
 - Global `--skip-update` / `--skip-check` options to make things quicker,
 		[37e8b00](https://git.autonomic.zone/coop-cloud/abra/commit/37e8b00)
+- `app backup` command; requires per-app definition -- see
+		[#70](https://git.autonomic.zone/coop-cloud/abra/issues/70)
 
 # abra 0.4.1 (2020-12-24)
 
diff --git a/abra b/abra
index c1795f8..367d6b6 100755
--- a/abra
+++ b/abra
@@ -12,21 +12,22 @@ DOC="
 The cooperative cloud utility belt 🎩🐇
 
 Usage:
-  abra [options] app new [--server=<server>] [--domain=<domain>] [--app-name=<app_name>] [--pass] [--auto] <type>
   abra [options] app (list|ls) [--status] [--server=<server>]
-  abra [options] app <app> deploy [--skip-check]
-  abra [options] app <app> undeploy
-  abra [options] app <app> config
-  abra [options] app <app> (delete|rm) [--force]
-  abra [options] app <app> logs [<service>]
-  abra [options] app <app> cp <src> <dst>
+  abra [options] app new [--server=<server>] [--domain=<domain>] [--app-name=<app_name>] [--pass] [--auto] <type>
+  abra [options] app <app> backup (<service>|--all)
+  abra [options] app <app> deploy
   abra [options] app <app> check
+  abra [options] app <app> config
+  abra [options] app <app> cp <src> <dst>
+  abra [options] app <app> logs [<service>]
   abra [options] app <app> ps
+  abra [options] app <app> restore (<service>|--all)
+  abra [options] app <app> (rm|delete) [--force]
   abra [options] app <app> run [--no-tty] [--user=<user>] <service> <args>...
   abra [options] app <app> secret auto [--pass]
   abra [options] app <app> secret generate <secret> <version> [<cmd>] [--pass]
   abra [options] app <app> secret insert <secret> <version> <data> [--pass]
-  abra [options] app <app> secret (delete|rm) (<secret>|--all) [--pass] [--force]
+  abra [options] app <app> secret (rm|delete) (<secret>|--all) [--pass] [--force]
   abra [options] app <app> <command> [<args>...]
   abra [options] server add <host> [<user>] [<port>]
   abra [options] server (list|ls)
@@ -146,94 +147,99 @@ eval "var_$1+=($value)"; else eval "var_$1=$value"; fi; return 0; fi; done
 return 1; }; stdout() { printf -- "cat <<'EOM'\n%s\nEOM\n" "$1"; }; stderr() {
 printf -- "cat <<'EOM' >&2\n%s\nEOM\n" "$1"; }; error() {
 [[ -n $1 ]] && stderr "$1"; stderr "$usage"; _return 1; }; _return() {
-printf -- "exit %d\n" "$1"; exit "$1"; }; set -e; trimmed_doc=${DOC:1:1477}
-usage=${DOC:40:1206}; digest=859ab
-shorts=(-h -e -s '' '' '' '' '' '' '' '' '' '' '')
-longs=(--help --env --stack --server --domain --app-name --pass --auto --status --skip-check --force --no-tty --user --all)
-argcounts=(0 1 1 1 1 1 0 0 0 0 0 0 1 0); node_0(){ switch __help 0; }; node_1(){
-value __env 1; }; node_2(){ value __stack 2; }; node_3(){ value __server 3; }
-node_4(){ value __domain 4; }; node_5(){ value __app_name 5; }; node_6(){
-switch __pass 6; }; node_7(){ switch __auto 7; }; node_8(){ switch __status 8; }
-node_9(){ switch __skip_check 9; }; node_10(){ switch __force 10; }; node_11(){
-switch __no_tty 11; }; node_12(){ value __user 12; }; node_13(){ switch __all 13
-}; node_14(){ value _type_ a; }; node_15(){ value _app_ a; }; node_16(){
-value _service_ a; }; node_17(){ value _src_ a; }; node_18(){ value _dst_ a; }
-node_19(){ value _args_ a true; }; node_20(){ value _secret_ a; }; node_21(){
-value _version_ a; }; node_22(){ value _cmd_ a; }; node_23(){ value _data_ a; }
-node_24(){ value _command_ a; }; node_25(){ value _host_ a; }; node_26(){
-value _user_ a; }; node_27(){ value _port_ a; }; node_28(){
-value _subcommands_ a true; }; node_29(){ _command app; }; node_30(){
-_command new; }; node_31(){ _command list; }; node_32(){ _command ls; }
-node_33(){ _command deploy; }; node_34(){ _command undeploy; }; node_35(){
-_command config; }; node_36(){ _command delete; }; node_37(){ _command rm; }
-node_38(){ _command logs; }; node_39(){ _command cp; }; node_40(){
-_command check; }; node_41(){ _command ps; }; node_42(){ _command run; }
-node_43(){ _command secret; }; node_44(){ _command auto; }; node_45(){
-_command generate; }; node_46(){ _command insert; }; node_47(){ _command server
-}; node_48(){ _command add; }; node_49(){ _command init; }; node_50(){
-_command apps; }; node_51(){ _command upgrade; }; node_52(){ _command version; }
-node_53(){ _command help; }; node_54(){ optional 0 1 2; }; node_55(){
-optional 54; }; node_56(){ optional 3; }; node_57(){ optional 4; }; node_58(){
-optional 5; }; node_59(){ optional 6; }; node_60(){ optional 7; }; node_61(){
-required 55 29 30 56 57 58 59 60 14; }; node_62(){ either 31 32; }; node_63(){
-required 62; }; node_64(){ optional 8; }; node_65(){ required 55 29 63 64 56; }
-node_66(){ optional 9; }; node_67(){ required 55 29 15 33 66; }; node_68(){
-required 55 29 15 34; }; node_69(){ required 55 29 15 35; }; node_70(){
-either 36 37; }; node_71(){ required 70; }; node_72(){ optional 10; }
-node_73(){ required 55 29 15 71 72; }; node_74(){ optional 16; }; node_75(){
-required 55 29 15 38 74; }; node_76(){ required 55 29 15 39 17 18; }; node_77(){
-required 55 29 15 40; }; node_78(){ required 55 29 15 41; }; node_79(){
-optional 11; }; node_80(){ optional 12; }; node_81(){ oneormore 19; }
-node_82(){ required 55 29 15 42 79 80 16 81; }; node_83(){
-required 55 29 15 43 44 59; }; node_84(){ optional 22; }; node_85(){
-required 55 29 15 43 45 20 21 84 59; }; node_86(){
-required 55 29 15 43 46 20 21 23 59; }; node_87(){ either 20 13; }; node_88(){
-required 87; }; node_89(){ required 55 29 15 43 71 88 59 72; }; node_90(){
-optional 81; }; node_91(){ required 55 29 15 24 90; }; node_92(){ optional 26; }
-node_93(){ optional 27; }; node_94(){ required 55 47 48 25 92 93; }; node_95(){
-required 55 47 63; }; node_96(){ required 55 47 25 37; }; node_97(){
-required 55 47 25 49; }; node_98(){ required 55 47 25 50 64; }; node_99(){
-required 55 51; }; node_100(){ required 55 52; }; node_101(){ oneormore 28; }
-node_102(){ optional 101; }; node_103(){ required 55 53 102; }; node_104(){
-either 61 65 67 68 69 73 75 76 77 78 82 83 85 86 89 91 94 95 96 97 98 99 100 103
-}; node_105(){ required 104; }; cat <<<' docopt_exit() {
-[[ -n $1 ]] && printf "%s\n" "$1" >&2; printf "%s\n" "${DOC:40:1206}" >&2
-exit 1; }'; unset var___help var___env var___stack var___server var___domain \
-var___app_name var___pass var___auto var___status var___skip_check var___force \
-var___no_tty var___user var___all var__type_ var__app_ var__service_ var__src_ \
-var__dst_ var__args_ var__secret_ var__version_ var__cmd_ var__data_ \
-var__command_ var__host_ var__user_ var__port_ var__subcommands_ var_app \
-var_new var_list var_ls var_deploy var_undeploy var_config var_delete var_rm \
-var_logs var_cp var_check var_ps var_run var_secret var_auto var_generate \
-var_insert var_server var_add var_init var_apps var_upgrade var_version var_help
-parse 105 "$@"; local prefix=${DOCOPT_PREFIX:-''}; unset "${prefix}__help" \
-"${prefix}__env" "${prefix}__stack" "${prefix}__server" "${prefix}__domain" \
-"${prefix}__app_name" "${prefix}__pass" "${prefix}__auto" "${prefix}__status" \
-"${prefix}__skip_check" "${prefix}__force" "${prefix}__no_tty" \
-"${prefix}__user" "${prefix}__all" "${prefix}_type_" "${prefix}_app_" \
-"${prefix}_service_" "${prefix}_src_" "${prefix}_dst_" "${prefix}_args_" \
-"${prefix}_secret_" "${prefix}_version_" "${prefix}_cmd_" "${prefix}_data_" \
-"${prefix}_command_" "${prefix}_host_" "${prefix}_user_" "${prefix}_port_" \
-"${prefix}_subcommands_" "${prefix}app" "${prefix}new" "${prefix}list" \
-"${prefix}ls" "${prefix}deploy" "${prefix}undeploy" "${prefix}config" \
-"${prefix}delete" "${prefix}rm" "${prefix}logs" "${prefix}cp" "${prefix}check" \
-"${prefix}ps" "${prefix}run" "${prefix}secret" "${prefix}auto" \
-"${prefix}generate" "${prefix}insert" "${prefix}server" "${prefix}add" \
-"${prefix}init" "${prefix}apps" "${prefix}upgrade" "${prefix}version" \
-"${prefix}help"; eval "${prefix}"'__help=${var___help:-false}'
+printf -- "exit %d\n" "$1"; exit "$1"; }; set -e; trimmed_doc=${DOC:1:1636}
+usage=${DOC:40:1260}; digest=0138f
+shorts=(-U -C -e -h -s '' '' '' '' '' '' '' '' '' '')
+longs=(--skip-update --skip-check --env --help --stack --status --server --domain --app-name --pass --auto --all --force --no-tty --user)
+argcounts=(0 0 1 0 1 0 1 1 1 0 0 0 0 0 1); node_0(){ switch __skip_update 0; }
+node_1(){ switch __skip_check 1; }; node_2(){ value __env 2; }; node_3(){
+switch __help 3; }; node_4(){ value __stack 4; }; node_5(){ switch __status 5; }
+node_6(){ value __server 6; }; node_7(){ value __domain 7; }; node_8(){
+value __app_name 8; }; node_9(){ switch __pass 9; }; node_10(){ switch __auto 10
+}; node_11(){ switch __all 11; }; node_12(){ switch __force 12; }; node_13(){
+switch __no_tty 13; }; node_14(){ value __user 14; }; node_15(){ value _type_ a
+}; node_16(){ value _app_ a; }; node_17(){ value _service_ a; }; node_18(){
+value _src_ a; }; node_19(){ value _dst_ a; }; node_20(){ value _args_ a true; }
+node_21(){ value _secret_ a; }; node_22(){ value _version_ a; }; node_23(){
+value _cmd_ a; }; node_24(){ value _data_ a; }; node_25(){ value _command_ a; }
+node_26(){ value _host_ a; }; node_27(){ value _user_ a; }; node_28(){
+value _port_ a; }; node_29(){ value _subcommands_ a true; }; node_30(){
+_command app; }; node_31(){ _command list; }; node_32(){ _command ls; }
+node_33(){ _command new; }; node_34(){ _command backup; }; node_35(){
+_command deploy; }; node_36(){ _command check; }; node_37(){ _command config; }
+node_38(){ _command cp; }; node_39(){ _command logs; }; node_40(){ _command ps
+}; node_41(){ _command restore; }; node_42(){ _command rm; }; node_43(){
+_command delete; }; node_44(){ _command run; }; node_45(){ _command secret; }
+node_46(){ _command auto; }; node_47(){ _command generate; }; node_48(){
+_command insert; }; node_49(){ _command server; }; node_50(){ _command add; }
+node_51(){ _command init; }; node_52(){ _command apps; }; node_53(){
+_command upgrade; }; node_54(){ _command version; }; node_55(){ _command help; }
+node_56(){ optional 0 1 2 3 4; }; node_57(){ optional 56; }; node_58(){
+either 31 32; }; node_59(){ required 58; }; node_60(){ optional 5; }; node_61(){
+optional 6; }; node_62(){ required 57 30 59 60 61; }; node_63(){ optional 7; }
+node_64(){ optional 8; }; node_65(){ optional 9; }; node_66(){ optional 10; }
+node_67(){ required 57 30 33 61 63 64 65 66 15; }; node_68(){ either 17 11; }
+node_69(){ required 68; }; node_70(){ required 57 30 16 34 69; }; node_71(){
+required 57 30 16 35; }; node_72(){ required 57 30 16 36; }; node_73(){
+required 57 30 16 37; }; node_74(){ required 57 30 16 38 18 19; }; node_75(){
+optional 17; }; node_76(){ required 57 30 16 39 75; }; node_77(){
+required 57 30 16 40; }; node_78(){ required 57 30 16 41 69; }; node_79(){
+either 42 43; }; node_80(){ required 79; }; node_81(){ optional 12; }
+node_82(){ required 57 30 16 80 81; }; node_83(){ optional 13; }; node_84(){
+optional 14; }; node_85(){ oneormore 20; }; node_86(){
+required 57 30 16 44 83 84 17 85; }; node_87(){ required 57 30 16 45 46 65; }
+node_88(){ optional 23; }; node_89(){ required 57 30 16 45 47 21 22 88 65; }
+node_90(){ required 57 30 16 45 48 21 22 24 65; }; node_91(){ either 21 11; }
+node_92(){ required 91; }; node_93(){ required 57 30 16 45 80 92 65 81; }
+node_94(){ optional 85; }; node_95(){ required 57 30 16 25 94; }; node_96(){
+optional 27; }; node_97(){ optional 28; }; node_98(){ required 57 49 50 26 96 97
+}; node_99(){ required 57 49 59; }; node_100(){ required 57 49 26 42; }
+node_101(){ required 57 49 26 51; }; node_102(){ required 57 49 26 52 60; }
+node_103(){ required 57 53; }; node_104(){ required 57 54; }; node_105(){
+oneormore 29; }; node_106(){ optional 105; }; node_107(){ required 57 55 106; }
+node_108(){
+either 62 67 70 71 72 73 74 76 77 78 82 86 87 89 90 93 95 98 99 100 101 102 103 104 107
+}; node_109(){ required 108; }; cat <<<' docopt_exit() {
+[[ -n $1 ]] && printf "%s\n" "$1" >&2; printf "%s\n" "${DOC:40:1260}" >&2
+exit 1; }'; unset var___skip_update var___skip_check var___env var___help \
+var___stack var___status var___server var___domain var___app_name var___pass \
+var___auto var___all var___force var___no_tty var___user var__type_ var__app_ \
+var__service_ var__src_ var__dst_ var__args_ var__secret_ var__version_ \
+var__cmd_ var__data_ var__command_ var__host_ var__user_ var__port_ \
+var__subcommands_ var_app var_list var_ls var_new var_backup var_deploy \
+var_check var_config var_cp var_logs var_ps var_restore var_rm var_delete \
+var_run var_secret var_auto var_generate var_insert var_server var_add \
+var_init var_apps var_upgrade var_version var_help; parse 109 "$@"
+local prefix=${DOCOPT_PREFIX:-''}; unset "${prefix}__skip_update" \
+"${prefix}__skip_check" "${prefix}__env" "${prefix}__help" "${prefix}__stack" \
+"${prefix}__status" "${prefix}__server" "${prefix}__domain" \
+"${prefix}__app_name" "${prefix}__pass" "${prefix}__auto" "${prefix}__all" \
+"${prefix}__force" "${prefix}__no_tty" "${prefix}__user" "${prefix}_type_" \
+"${prefix}_app_" "${prefix}_service_" "${prefix}_src_" "${prefix}_dst_" \
+"${prefix}_args_" "${prefix}_secret_" "${prefix}_version_" "${prefix}_cmd_" \
+"${prefix}_data_" "${prefix}_command_" "${prefix}_host_" "${prefix}_user_" \
+"${prefix}_port_" "${prefix}_subcommands_" "${prefix}app" "${prefix}list" \
+"${prefix}ls" "${prefix}new" "${prefix}backup" "${prefix}deploy" \
+"${prefix}check" "${prefix}config" "${prefix}cp" "${prefix}logs" "${prefix}ps" \
+"${prefix}restore" "${prefix}rm" "${prefix}delete" "${prefix}run" \
+"${prefix}secret" "${prefix}auto" "${prefix}generate" "${prefix}insert" \
+"${prefix}server" "${prefix}add" "${prefix}init" "${prefix}apps" \
+"${prefix}upgrade" "${prefix}version" "${prefix}help"
+eval "${prefix}"'__skip_update=${var___skip_update:-false}'
+eval "${prefix}"'__skip_check=${var___skip_check:-false}'
 eval "${prefix}"'__env=${var___env:-}'
+eval "${prefix}"'__help=${var___help:-false}'
 eval "${prefix}"'__stack=${var___stack:-}'
+eval "${prefix}"'__status=${var___status:-false}'
 eval "${prefix}"'__server=${var___server:-}'
 eval "${prefix}"'__domain=${var___domain:-}'
 eval "${prefix}"'__app_name=${var___app_name:-}'
 eval "${prefix}"'__pass=${var___pass:-false}'
 eval "${prefix}"'__auto=${var___auto:-false}'
-eval "${prefix}"'__status=${var___status:-false}'
-eval "${prefix}"'__skip_check=${var___skip_check:-false}'
+eval "${prefix}"'__all=${var___all:-false}'
 eval "${prefix}"'__force=${var___force:-false}'
 eval "${prefix}"'__no_tty=${var___no_tty:-false}'
 eval "${prefix}"'__user=${var___user:-}'
-eval "${prefix}"'__all=${var___all:-false}'
 eval "${prefix}"'_type_=${var__type_:-}'; eval "${prefix}"'_app_=${var__app_:-}'
 eval "${prefix}"'_service_=${var__service_:-}'
 eval "${prefix}"'_src_=${var__src_:-}'; eval "${prefix}"'_dst_=${var__dst_:-}'
@@ -249,16 +255,18 @@ eval "${prefix}"'_port_=${var__port_:-}'
 if declare -p var__subcommands_ >/dev/null 2>&1; then
 eval "${prefix}"'_subcommands_=("${var__subcommands_[@]}")'; else
 eval "${prefix}"'_subcommands_=()'; fi; eval "${prefix}"'app=${var_app:-false}'
-eval "${prefix}"'new=${var_new:-false}'
 eval "${prefix}"'list=${var_list:-false}'; eval "${prefix}"'ls=${var_ls:-false}'
+eval "${prefix}"'new=${var_new:-false}'
+eval "${prefix}"'backup=${var_backup:-false}'
 eval "${prefix}"'deploy=${var_deploy:-false}'
-eval "${prefix}"'undeploy=${var_undeploy:-false}'
-eval "${prefix}"'config=${var_config:-false}'
-eval "${prefix}"'delete=${var_delete:-false}'
-eval "${prefix}"'rm=${var_rm:-false}'; eval "${prefix}"'logs=${var_logs:-false}'
-eval "${prefix}"'cp=${var_cp:-false}'
 eval "${prefix}"'check=${var_check:-false}'
-eval "${prefix}"'ps=${var_ps:-false}'; eval "${prefix}"'run=${var_run:-false}'
+eval "${prefix}"'config=${var_config:-false}'
+eval "${prefix}"'cp=${var_cp:-false}'; eval "${prefix}"'logs=${var_logs:-false}'
+eval "${prefix}"'ps=${var_ps:-false}'
+eval "${prefix}"'restore=${var_restore:-false}'
+eval "${prefix}"'rm=${var_rm:-false}'
+eval "${prefix}"'delete=${var_delete:-false}'
+eval "${prefix}"'run=${var_run:-false}'
 eval "${prefix}"'secret=${var_secret:-false}'
 eval "${prefix}"'auto=${var_auto:-false}'
 eval "${prefix}"'generate=${var_generate:-false}'
@@ -271,18 +279,18 @@ eval "${prefix}"'upgrade=${var_upgrade:-false}'
 eval "${prefix}"'version=${var_version:-false}'
 eval "${prefix}"'help=${var_help:-false}'; local docopt_i=1
 [[ $BASH_VERSION =~ ^4.3 ]] && docopt_i=2; for ((;docopt_i>0;docopt_i--)); do
-declare -p "${prefix}__help" "${prefix}__env" "${prefix}__stack" \
-"${prefix}__server" "${prefix}__domain" "${prefix}__app_name" \
-"${prefix}__pass" "${prefix}__auto" "${prefix}__status" \
-"${prefix}__skip_check" "${prefix}__force" "${prefix}__no_tty" \
-"${prefix}__user" "${prefix}__all" "${prefix}_type_" "${prefix}_app_" \
-"${prefix}_service_" "${prefix}_src_" "${prefix}_dst_" "${prefix}_args_" \
-"${prefix}_secret_" "${prefix}_version_" "${prefix}_cmd_" "${prefix}_data_" \
-"${prefix}_command_" "${prefix}_host_" "${prefix}_user_" "${prefix}_port_" \
-"${prefix}_subcommands_" "${prefix}app" "${prefix}new" "${prefix}list" \
-"${prefix}ls" "${prefix}deploy" "${prefix}undeploy" "${prefix}config" \
-"${prefix}delete" "${prefix}rm" "${prefix}logs" "${prefix}cp" "${prefix}check" \
-"${prefix}ps" "${prefix}run" "${prefix}secret" "${prefix}auto" \
+declare -p "${prefix}__skip_update" "${prefix}__skip_check" "${prefix}__env" \
+"${prefix}__help" "${prefix}__stack" "${prefix}__status" "${prefix}__server" \
+"${prefix}__domain" "${prefix}__app_name" "${prefix}__pass" "${prefix}__auto" \
+"${prefix}__all" "${prefix}__force" "${prefix}__no_tty" "${prefix}__user" \
+"${prefix}_type_" "${prefix}_app_" "${prefix}_service_" "${prefix}_src_" \
+"${prefix}_dst_" "${prefix}_args_" "${prefix}_secret_" "${prefix}_version_" \
+"${prefix}_cmd_" "${prefix}_data_" "${prefix}_command_" "${prefix}_host_" \
+"${prefix}_user_" "${prefix}_port_" "${prefix}_subcommands_" "${prefix}app" \
+"${prefix}list" "${prefix}ls" "${prefix}new" "${prefix}backup" \
+"${prefix}deploy" "${prefix}check" "${prefix}config" "${prefix}cp" \
+"${prefix}logs" "${prefix}ps" "${prefix}restore" "${prefix}rm" \
+"${prefix}delete" "${prefix}run" "${prefix}secret" "${prefix}auto" \
 "${prefix}generate" "${prefix}insert" "${prefix}server" "${prefix}add" \
 "${prefix}init" "${prefix}apps" "${prefix}upgrade" "${prefix}version" \
 "${prefix}help"; done; }
@@ -676,6 +684,26 @@ sub_app_new (){
   echo "    abra app $APP_NAME deploy$(tput sgr0)"
 }
 
+###### .. app backup
+sub_app_backup (){
+  load_instance
+  load_instance_env
+
+  require_app_latest "$TYPE"
+
+  # Add _<service> if it's defined
+  FUNCTION="abra_backup${abra__service_:+_}$abra__service_"
+
+  if ! type "$FUNCTION" > /dev/null 2>&1; then
+    error "'$TYPE' doesn't know how to do ${abra__service_}${abra__service_:+ }backups."\
+      "See $GIT_URL$TYPE/issues/"
+  fi
+
+  mkdir -p "$ABRA_DIR/backups"
+
+  $FUNCTION
+}
+
 ###### .. app deploy
 help_app_deploy (){
   echo "abra [options] app <domain> deploy [--skip-check]