Apple has a [Q&A article about the various ways to reduce the size of your application](https://developer.apple.com/library/ios/qa/qa1795/_index.html). Most noticeable is the `Fastest, Smallest [-Os]` optimization level and enabling Strip Debug Symbols During Copy.

We recommend using [ImageOptim](https://imageoptim.com/) to reduce the size of your images. Applications like Adobe Photoshop save a lot of additional metadata in file formats such as PNG, and ImageOptim is very good for both removing such metadata and reducing image size by up to 90 percent. There’s an [interesting case study](https://imageoptim.com/tweetbot.html) detailing how using ImageOptim halved the size of Tweetbot.

We recommend archiving your app and then [inspecting the final `.ipa` file](http://osxdaily.com/2011/04/07/extract-and-explore-an-ios-app-in-mac-os-x/). Sometimes files that should not be in the application end up there, and a simple check can find files that have accidentally been copied for release.

You can [view the `.ipa` file contents sorted by compressed size](https://web.archive.org/web/20140409144750/http://realmacsoftware.com/blog/slimming-down-your-app) using the following:

```shell

zipinfo -l path/to/app.ipa | sort -nr -k 6

```

This allows you to quickly identify which files take up the most space in the compressed `.ipa` file.
---

## Related pages

- [Advanced CocoaPods integration](/guides/ios/miscellaneous/advanced-cocoapods-integration.md)
- [App Transport Security](/guides/ios/pspdfkit-instant/app-transport-security.md)
- [Advanced Carthage integration](/guides/ios/miscellaneous/advanced-carthage-integration.md)
- [Bitcode](/guides/ios/faq/bitcode.md)
- [Carthage integration](/guides/ios/best-practices/carthage-integration.md)
- [Framework Size](/guides/ios/faq/framework-size.md)
- [Airdrop](/guides/ios/features/airdrop.md)
- [Customizing The Page Number](/guides/ios/customizing-pdf-pages/customizing-the-page-number.md)
- [Nightly Builds](/guides/ios/best-practices/nightly-builds.md)
- [About Memory Usage](/guides/ios/memory-and-storage/about-memory-usage.md)
- [Customizing the log level on iOS](/guides/ios/features/logging.md)
- [iOS PDF SDK security](/guides/ios/faq/sdk-security.md)
- [Powered By Nutrient](/guides/ios/miscellaneous/powered-by-nutrient.md)
- [Optimize PDF documents for mobile rendering on iOS](/guides/ios/miscellaneous/optimize-pdf-documents-for-mobile-rendering.md)
- [Third Party Compatibility](/guides/ios/miscellaneous/third-party-compatibility.md)
- [Modifying permissions in your iOS app](/guides/ios/getting-started/permissions.md)
- [Transferring File Edits To A Server](/guides/ios/best-practices/transferring-file-edits-to-a-server.md)
- [Saving Data Externally](/guides/ios/memory-and-storage/saving-data-externally.md)
- [Using Document Efficiently](/guides/ios/getting-started/using-document-efficiently.md)
- [Using Automatic Saving Safely](/guides/ios/best-practices/using-automatic-saving-safely.md)
- [Manage your iOS status bar with view controllers](/guides/ios/faq/view-controller-based-status-bar-appearance.md)
- [Strategies For Multiple Bundle Ids](/guides/ios/faq/strategies-for-multiple-bundle-ids.md)
- [Youtube Links](/guides/ios/miscellaneous/youtube-links.md)
- [Version Numbering](/guides/ios/best-practices/version-numbering.md)