# Statistical Criteria Change History

### **2025** <a href="#id-2025" id="id-2025"></a>

* Changes According to Smartphone Population Shifts
  * Daily Data: Sep 1
  * Weekly Data: 1st week of Sep
  * Monthly Data: Sep

### **2022** <a href="#id-2022" id="id-2022"></a>

* Changes as iOS smartphone population grows
  * Daily Data: Jan 1
  * Weekly Data: 1st week of Jan
  * Monthly Data: Jan
* Changes as smartphone population grows
  * Daily Data: Sep 1
  * Weekly Data: 1st week of Sep
  * Monthly Data: Sep

### **2021** <a href="#id-2021" id="id-2021"></a>

* Changes due to fluctuations in smartphone population by OS
  * Daily Data: Aug 1st&#x20;
  * Weekly Data: 1st week of Aug&#x20;
  * Monthly Data: Aug

### **2020** <a href="#id-2020" id="id-2020"></a>

* Changes as Android smartphone population declines
  * Daily Data: May 1&#x20;
  * Weekly Data: 5th week of Apr
  * Monthly Data: May

### **2019** <a href="#id-2019" id="id-2019"></a>

* Changes as smartphone population grows
  * Daily Data: Jul 1&#x20;
  * Weekly Data: 1st week of Jul
  * Monthly Data: Jul

### **2018** <a href="#id-2018" id="id-2018"></a>

* Changes as smartphone population grows
  * Daily Data: May 1
  * Weekly Data: 5th week of Apr
  * Monthly Data: May

### **2017** <a href="#id-2017" id="id-2017"></a>

* Changes as smartphone population grows
  * Daily Data: Feb 27
  * Weekly Data: 1st week of Mar
  * Monthly Data: Mar

### **2016** <a href="#id-2016" id="id-2016"></a>

* Changes as smartphone population grows
  * Daily Data: Oct 2
  * Weekly Data: 1st week of Oct
  * Monthly Data: Oct


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