RedDimmer
RedDimmer vs Iris
Considering an Iris alternative for Mac? Both Iris and RedDimmer offer ways to change screen colour and brightness. RedDimmer focuses on a free native Mac experience with two sliders and a few useful routines.
Choose RedDimmer if you want free warmth and dimming with editable presets and local schedules. Consider Iris if its wider collection of modes, advanced settings or rest-timer options is what you need. Check the Iris edition and licence before deciding.
Try RedDimmer's interactive preview →RedDimmer's Mac App Store release is in preparation.
RedDimmer and Iris: at a glance
| What matters | RedDimmer | Iris |
|---|---|---|
| Price | Free; no account or subscription | Full Iris has a trial and paid licence options; editions differ |
| Brightness and warmth | Independent sliders; software brightness down to 10% | Brightness and colour controls |
| Presets | Three editable everyday presets | Multiple modes and customisable colour schemes |
| Daily routine | Sunset/sunrise or fixed-time schedules | Automatic day/night settings and advanced options |
| Focus | Native Mac menu-bar dimming and warm-to-red colour | Broader collection of display preferences |
| Getting it | Mac App Store release in preparation | macOS download on IrisTech |
Iris references: Iris product and macOS download ↗ · Iris Pro feature documentation ↗ · Iris licences and editions ↗
Save the evening setting you actually use
RedDimmer starts with a small set of controls: warmth, software brightness and three editable presets. You can move from neutral colour to warm amber or pure red, then choose a darker image independently. Fixed-time or sunset schedules can make that choice part of your day. There is no account or subscription to manage, so the decision can stay focused on the appearance you prefer.
Explore RedDimmer's evening controls →When Iris is the better fit
Iris offers multiple modes and advanced preferences beyond a simple colour slider. Its documentation includes a rest timer, colour schemes and additional customisation. If those particular settings are part of your workflow, it deserves a look. Iris is a product family, so the full Iris app, Iris Pro and Iris mini should not be treated as the same purchase or feature set.
Iris product and macOS download ↗ · Iris Pro feature documentation ↗ · Iris licences and editions ↗
For someone moving from a trial to a daily routine
Write down the settings you actually use rather than comparing the longest feature lists. If they are brightness, warmth, a favourite evening preset and a scheduled change, RedDimmer covers that focused routine for free. If you rely on a specific Iris timer or specialised setting, check whether you would miss it before switching. A filter's feature list does not establish a medical benefit; the research discussion on our homepage explains the evidence separately.
Compare the appearance on your own display, keep text readable, and return to normal colour for colour-sensitive work. Our linked research explanations separate screen preferences from health claims.
Questions before you choose
Is RedDimmer an Iris alternative for Mac?
Yes, if your main requirements are software brightness, warmth, editable presets and schedules. Iris has additional preferences, so compare the settings you use before switching.
Is Iris free like RedDimmer?
The full Iris product has a trial and paid options. Iris mini is a separate product with different terms. RedDimmer is free without an account or subscription.
Does software dimming prove that a screen has no flicker?
No. RedDimmer does not measure flicker or promise to eliminate it, and it leaves hardware backlight control to you. A software setting alone cannot certify a display's physical behaviour.
Sources and how we compare
Iris product and macOS download ↗ · Iris Pro feature documentation ↗ · Iris licences and editions ↗
This comparison is written by Guiix, the maker of RedDimmer. It uses the official product descriptions linked above and RedDimmer's current features. It is a feature guide; it does not report a head-to-head hardware test, clinical study or independent review. Other product names belong to their respective owners. Check the official release notes and licence terms for the version you choose.
A softer screen for your evenings.
Free warmth and dimming. Editable presets. A routine that fits your day.
Mac App Store release in preparation.