In　this　paper,　a　fetal　electrocardiogram　(ECG)　monitoring　system　based　on　the　Android　smartphone　was　proposed.　We　designed　a　portable　low-power　fetal　ECG　collector,　which　collected　maternal　abdominal　ECG　signals　in　real　time.　The　ECG　data　were　sent　to　a　smartphone　client　via　Bluetooth.　Smartphone　app　software　was　developed　based　on　the　Android　system.　The　app　integrated　the　fast　fixed-point　algorithm　for　independent　component　analysis　(FastICA)　and　the　sample　entropy　algorithm,　for　the　sake　of　real-time　extraction　of　fetal　ECG　signals　from　the　maternal　abdominal　ECG　signals.　The　fetal　heart　rate　was　computed　using　the　extracted　fetal　ECG　signals.　Experimental　results　showed　that　the　FastICA　algorithm　can　extract　a　clear　fetal　ECG,　and　the　sample　entropy　can　correctly　determine　the　channel　where　the　fetal　ECG　is　located.　The　proposed　fetal　ECG　monitoring　system　may　be　feasible　for　non-invasive,　real-time　monitoring　of　fetal　ECGs.