Graphic above: 2015-2019 Marketshares IDC Forecast. China, US, Europe decrease, India and "Rest of the World" increase (in terms of percentage of global total marketshare).
IDC Worldwide Smartphone Forecast by OS – Shipments, Market Share, Year-Over-Year Growth, and 5-Year CAGR (Compound Annual Growth Rate) (shipments in millions):
| Region | 2015* Shipment Volumes | 2015* Market Share | 2015* YoY Growth | 2019* Shipment Volumes | 2019* Market Share | 2019* YoY Growth | 5 year CAGR |
| Android | 1,161.1 | 81.2% | 9.5% | 1,538.1 | 82.6% | 4.8% | 7.7% |
| iOS | 226.0 | 15.8% | 17.3% | 263.4 | 14.1% | 3.1% | 6.5% |
| Windows Phone | 31.3 | 2.2% | -10.2% | 43.6 | 2.3% | 11.4% | 4.5% |
| Others | 11.3 | 0.8% | -16.8% | 17.1 | 0.9% | 6.5% | 4.7% |
| TOTAL | 1,429.8 | 100.0% | 9.8% | 1,862.3 | 100.0% | 4.7% | 7.4% |
*Forecast data; source: IDC Worldwide Quarterly Mobile Phone Tracker, December 2, 2015.
Note: Apple's (iOS) OS global marketshare declines (2015-2019) from 15.8% to 14.1%.
Worldwide Smartphone Market Will See the First Single-Digit Growth Year on Record, According to IDC (press release): "Android's market share is expected to grow slightly from 81% in 2015 to 82% over the forecast period [2015-2019]. Despite numerous attempts by "alternative platforms" to enter the market, none have proved successful. IDC believes the proliferation of the core Android platform will continue with huge efforts being put forth by companies like Cyanogen and Xiaomi to differentiate themselves from their competitors. Given its global footprint and application/services ecosystem, IDC fully expects some form of Android to hold a dominant share of the smartphone OS space for the foreseeable future."
See also:
- DoubleClick Advertiser Blog: "eMarketer estimates that mobile will account for 72% of U.S. digital ad spend by 2019 and Google's tech-forward target audience spends more than 74% of its time on mobile."
- 8 facts that explain Google's complex situation with Chrome OS | CIO: "This explainer puts Android and the Chrome OS into perspective and shows why these Linux derivatives will both come together and remain separate."
- Why iOS and Android will soon become obsolete | CIO: "The market is eventually going to move to one product that scales from a smartphone to a PC. Columnist Rob Enderle says it doesn’t appear that either Apple or Google will dominate this coming shift."