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Analysed DDRs comparison [71].
| DDR | Advantages | Drawbacks |
|---|---|---|
| WURFL | Upgradeable to new versions | Errors in data |
| A hierarchy which allows to infer values | Many empty values | |
| Many capabilities modelled | ||
| Very easy to configure | ||
| Powerful API | ||
|
| ||
| OpenDDR | Free to use, even commercially | Limited number of capabilities |
| Growing community | Default values for unknown data | |
|
| ||
| 51Degrees.mobi | A Lite version, free to use even commercially | Limited number of capabilities |
| Easy to install and use | ||
