Grid rows don't render correctly in android ionic app

This is looks like on iphone and this its ok
http://1drv.ms/1AqjRHn

This is looks like on android and this its wrong
http://1drv.ms/1wZS06a

This is my css

.itemDas {
	padding-top: 5px;
	padding-left: 5px;
	padding-right: 5px;
	padding-bottom: 5px;
}

.itemDas button {
	cursor:pointer;
    border:none;
  
	border-color: transparent;
    background: none;

	margin-left: auto;
    margin-right: auto;

    padding-top: 5px;
	padding-left: 5px;
	padding-right: 5px;
	padding-bottom: 5px;

	width: 100%;
	height: 100%;
  
}

.itemDas button:active {
	opacity:0.5;  
}

.itemDas button img {
	margin-left: auto;
    margin-right: auto;
    display: block;
	width: 100%;
	height: 100%;

}

.itemDas p{
  color: gray;
  font-size: 20px;
  text-shadow: 1px 2px 2px white; 

}

And This is my Html5

<ion-view title="Menu Principal">
  <ion-nav-buttons side="left">
    <button  menu-toggle="left"class="button button-icon icon ion-navicon"></button>
  </ion-nav-buttons>
 <ion-content padding="true" class="has-header">
      <div class="row">
		  <div class="col">
		  	<div class="itemDas">
		  		<button ui-sref="app.camera">
		  			<img src="img/checkIcon.png"> 
		  			<p>CheckIn</p>
		  		</button>
		  	</div>
		  </div>
		  <div class="col">
		  	<div class="itemDas">
		  		<button ui-sref="app.customers">
		  		<img src="img/custIcon.png"> 
		  		<p>Clientes</p>
		  		</button>
		  	</div>
		  </div>
		  </div>
	  </div>
    </ion-content>
</ion-view>