Inconsistent Fonts
If your PDF document has embedded fonts, any viewer on any device should render them as expected. A PDF viewer will replace a font if the document does not have it embedded and if it is not available on the device.
Here’s how determine if your PDF document has embedded fonts:
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Open the PDF document in Acrobat Pro or Acrobat Reader (free and available on all platforms).
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Go to the File... menu and select Properties…, or use the Cmd + D keyboard shortcut.

- Click on the Fonts tab.

You may see the words Embedded Subset (like in the example above) or just the word Embedded. If a subset of a font is embedded, this means that only the characters used in that particular document are embedded.
Most PDF-authoring apps like Acrobat Pro support embedding fonts in a PDF document. Make sure you embed the fonts so that your document looks as expected across devices and readers.