# `GSFont.appVersion`

*Instance Property*

The Glyphs app version that last wrote the font.

## Declaration

```swift
var appVersion: String? { get set }
```

```objc
@property (nonatomic, strong) NSString * appVersion;
```

[See also `appVersion` in the Python API](https://docu.glyphsapp.com/#GSFont.appVersion)

```python
pyobjc_instanceMethods.appVersion() -> str
pyobjc_instanceMethods.setAppVersion_(appVersion: str)
```

## See Also

### File Format

- [`GSFont.formatVersion`](/Core/GlyphsCore/GSFont/formatVersion) — The Glyphs file format version used to read and write the font.
- [`GSFont.storedFileType`](/Core/GlyphsCore/GSFont/storedFileType) — The package type recorded in serialized font data.
- [`GSFont filterLegacyDefaultProperties:filterKeys:format:`](/Core/GlyphsCore/GSFont/filterLegacyDefaultProperties:filterKeys:format:) — Filters default-language properties that cannot be represented in legacy formats.
- [`GSFont legacyInfoKeys`](/Core/GlyphsCore/GSFont/legacyInfoKeys) — Font info property names used by legacy file formats.