Savior
Savior reviewedSurprise MeApp with self-guided tours from locals
 RecommendedPros: 

Nice guiding tour app

Cons: 

sometimes 3G and LTE not work properly, so it’s better to connect to WiFi instantly

actually nice

Savior has used this product for one week.
Thank you for review! Also stable network connection is needed only once while you download the route.