App-Locker

Sometimes it's necessary to "lock" certain apps. E.g. when giving your smartphone to someone else for a call or something else, you probably don't want that person to have full access to everything. For this, the following apps come in handy:

Child protection

2019-04-05

KidsWorld: safe place for kids (4.4@6,111) Ǥ 15 LastUpdate: 2016-11-26
Kids Zone - Parental Controls & Child Lock (4.2@6,075) Ǥ 14 Video Review 8/2013; Test 10/2018 Datenschutz gut, aber nur für kleinere Kinder geeignet (no tracking; only suited for small kids)
KIDOZ: Safe Mode with Free Games for Kids (4.1@17,127) Ǥ 18 Review 1/2013; Test 4/2013 | 1/2014
Kid´s Shell - Safe Kid Launcher - parental control (4.1@4,044) Ǥ 21
AIS Safe & Care (4.1@1,217) Ǥ 23 LastUpdate: 2016-12-21
Kids Place - Parental Control (4@29,781) Ǥ 26 Video Review 10/2012 | 9/2013; Kurztest 5/2013; Vorstellung 11/2013
Kid Mode: Free Learning Games (3.9@40) Ǥ 23
Kakatu - Parental Control (3.8@1,845) Ǥ 28 LastUpdate: 2016-12-23 Intro 6/2016
App Kids: Videos & Games (3.8@1,737) Ǥ 20
Child App Protector (3.4@197) 7 LastUpdate: 2017-08-14 incl. "kids timer" (lock app after xx minutes)
Xposed Kids Mode (0@0) LastUpdate: 2014-06-30 Intro 6/2014; Test 10/2014; Allow access to up to 8 apps, lock everything else

Other App-Lockers

2019-04-05

Super AppLock (App Protector) (5@14) 17 LastUpdate: 2013-07-24
New Applock - Aplication lock (5@1) Ǥ 15 Github; incl. photo on failed attempt
Security Master - Antivirus, VPN, AppLock, Booster (4.7@25,536,593) Ǥ 52 / CM Security Lite - Antivirus (4.6@270,374) Ǥ 32 / Stubborn Trojan Killer (4.5@170,626) 20 Vorstellung 5/2014; Test 11/2014; Sicherheits-Check 12/2015
AppLock - ????Gallery, Message, Apps Locker (4.6@146,203) Ǥ 19 many themes available
Applock (4.6@62,768) 19
AppLock - Lock App and photo & video vault (4.6@67) Ǥ 14
Perfect AppLock(App Protector) (4.5@282,686) Ǥ 26 / Perfect App Lock Pro (4.4@9,164; ~EUR 3.00) Ǥ 24 Test 6/2012; Vorstellung 9/2013
LOCX Applock Lock Apps & Photo (4.5@212,744) Ǥ 28 Promo-Review 11/2014
App Lock: Locker w/ fingerprint, Parental Control (4.5@40,570) Ǥ 20
Hotspot Shield Privacy Wizard (4.5@17,396) Ǥ 15
App Locker Master (4.5@15,178) 17
AppLock (4.4@5,406,246) Ǥ 36 Vorstellung 3/2012 | 2/2013 | 11/2013; Review 2/2012 | 9/2013 | 2/2014; many themes available
AppLock - Fingerprint (4.4@785,581) Ǥ 28 Vorstellung 9/2013; Intro 1/2014
App Lock (4.4@353,637) 6
Smart AppLock (App Protect) (4.4@142,293) Ǥ 36 / Smart AppLock Pro (4.3@2,878; ~EUR 3.25) Ǥ 23 Test 12/2012; Video Review 8/2013
AppLock (4.4@45,803) Ǥ 17
MaxLock - Xposed app locker (4.4@1,688) Ǥ 9
Private Zone - AppLock, Video & Photo Vault (4.3@1,704,323) Ǥ 96 Review 9/2015 | 10/2015; Video Review 9/2015; not about privacy (see trackers and permissions)
Green App Lock (4.3@12,522) 13
App Lock Android (4.3@790) 9 LastUpdate: 2017-07-26
App Locker (4.3@42) 10 LastUpdate: 2017-08-11 lock apps, messages, contacts, settings, calls
Smart Lock (App/Photo) (4.2@83,480) Ǥ 23 Kurztest 6/2013
Super AppLock privacy security (4.2@49,348) 14 LastUpdate: 2016-06-17
AppLock Pro (4.2@10,247) 24
AppDefender (App Lock) (4.1@7,578) 11 / AppDefender Pro (App Lock) (4.2@195; ~EUR 2.50) Ǥ 13
Lock app (AppLock) (4.1@5,265) Ǥ 13 LastUpdate: 2017-08-01
Applock Pattern (4.1@2,584) 11 LastUpdate: 2017-06-22
AppLock Master - Lockdown (4.1@1,105) 10 LastUpdate: 2015-11-17
AppLock (3.9@2,693) 11 LastUpdate: 2017-02-22
Smart App Locker (3.9@63) Ǥ 21
Avira AppLock+ (3.8@2,796) Ǥ 13 Test 8/2016
Toolwiz AppLock (Open Source) (3.8@135) Ǥ 18 LastUpdate: 2017-02-14 Github
ProtectedApps (3.6@151) 4 $Contains no known trackers \o/$ Intro 7/2014; Video Tutorial 8/2014; Xposed based app locker
App Lock (0@0) 5 $Contains no known trackers \o/$ Github; fork of Applock
Restrict Me (0@0) LastUpdate: 2014-09-10 Github; Disallow opening the Settings app when in a restricted profile
MinMinLock (0@0) LastUpdate: 2014-05-29 Github; XDA with screenshots; Video Review 6/2014; battery-friendly

For a Google-Search, a good term is "kiosk mode" (e.g. android +"kiosk mode"). The result list will a.o. yield the following interesting pages:

KioWare - Kiosk System Software
Kiosk Mode on Android with SureLock (10/2011)
Kiosk mode on Android (10/2011)

Further Readings:

Child Protection:
- Category Child Protection
- 7 Best FREE Android Parental Control Apps (9/2013)
- Android Parental Control: 3 Perfect Ways to Protect your Child (6/2013)
- How to Enable Parental Controls on your Android Smartphone or Tablet (2/2013)
- Parent controls for Android (12/2011)
App-Locker in general:
- Android for Work isoliert und verwaltet Firmendaten (4/2015)
- So versteckt Ihr Dateien und Apps mit Android (10/2014)
- Best App Lockers for Android 2014 (2/2014)
- 5 Best apps for password protecting your Android apps (12/2013)
- 5 Best Free Tools To Lock Or Password-Protect Apps On Android (11/2013)
- Top Free App Locker For Android Smartphone 2013 (7/2013)
- App Locker für Android (2/2013)

2019-04-09

IzzyOnDroid

App-Locker

Child protection

Other App-Lockers