This utility app helps you calculate and scale screen resolutions based on aspect ratios. Save and manage your frequently used resolutions for easy access. Sync your presets across Apple devices.
Reviews of Resolutioner are mixed: the Developer Tools app is rated 4.5/5 from 954 App Store ratings. What users like most: very good app, excellent for calculations. Top complaints: resolution not changing, app doesn't work. Summarized from real user reviews.
2.2.1
October 22, 2026
Resolutioner is now ready for iPhone Duo! This update brings full support for iPhone Duo. The app now adapts to both screens, all poses, and all orientations. New with v2.2.1: added iPhone Duo screenshots to the App Store listing
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8 issues
Resolution does not change
App does not work
4 requests
Add sync to device option
Add button to improve/submit resolution
Resolutioner is a utility app designed to help you calculate and scale screen resolutions. It allows you to determine a missing resolution based on a set aspect ratio, or to scale an existing resolution up or down while maintaining its aspect ratio. You can also save frequently used resolutions as presets for future reference.
You can calculate resolutions by filling in one side of the resolution (e.g., width or height) and setting your desired aspect ratio. The app will then compute the corresponding other side. You can input standard fractions like 16:9 or use an existing resolution to define the ratio for scaling.
Yes, you can save any resolution you calculate or create as a preset. Simply tap 'Add Preset' and give it a custom name. These saved presets can be edited at any time, making it convenient to access your preferred resolutions quickly.
The application is free to download and use, with options for in-app purchases. This model allows users to try out the core functionality before deciding to invest in additional features or content.
Resolutioner supports a range of Apple devices, including iPhone, iPad, and Mac. All your saved resolution presets can be synced across these devices using iCloud, ensuring consistency and accessibility no matter which device you are using.
