My most-liked Instagram photo ever was taken on a $200 phone. I talk about that a lot, mostly to make a point: the gap between “phone photo” and “real photo” is closing faster than most people realize. What I don’t talk about as much is how that gap closes. It isn’t just the hardware improving, it’s the software sitting on top of it, quietly doing math that would have required a studio setup a decade ago.

So when I came across a Peter McKinnon tutorial claiming that a $10 app could outperform Apple’s native camera, I did what any skeptical photographer would do. I watched it on my Sunday morning photo walk, then immediately downloaded the app and tested it myself. The app he covers is Leica Lux, a computational photography app developed by Leica, and his argument is straightforward: the software processing engine behind it renders images differently than Apple’s built-in camera, and the results speak for themselves. Watch the full tutorial on YouTube if you want to see his side-by-side comparisons first.

For anyone who shoots casually on their phone, whether that’s family moments, travel snapshots, or street photography between “real” camera sessions, this is worth understanding. Here’s what the tutorial covers, broken down into actionable steps.

Step 1: Understand Why Software Now Matters More Than Optics

Peter explaining Leica Lux app against a forest backdrop Peter explaining Leica Lux app against a forest backdrop Phone lenses can only improve so much given the physical space available inside a device. What continues to improve dramatically is the computational layer, the software that interprets and processes what the sensor captures. Leica Lux takes advantage of this by applying Leica’s own image science to your phone’s camera hardware. Think of it as putting a different brain behind the same set of eyes.

This is the core argument McKinnon makes before even opening the app, and it reframes how you should think about phone photography upgrades. Before you spend money on a clip-on lens or a new phone case, consider that the processing software you use might be the highest-leverage change you can make right now.

Step 2: Download Leica Lux and Open It Instead of Your Default Camera

Leica Lux app name and icon mentioned on screen Leica Lux app name and icon mentioned on screen The app costs around $10, either as a one-time purchase or through a subscription depending on the version available in your region. Once installed, the goal is simple: replace the habit of reaching for Apple’s native camera with the habit of reaching for this one. That behavioral shift is harder than it sounds, but it’s the only way to actually see the difference in your own photos over time.

When you open Leica Lux, the interface feels cleaner and more deliberate than Apple’s default. It’s built around the idea of manual intention. You’re not just pointing and tapping. You’re making small decisions about how the image should look before you press the shutter.

Step 3: Choose Your Leica Lens Profile

Discussing focal length selection within the Leica Lux app Discussing focal length selection within the Leica Lux app One of the most distinctive features McKinnon highlights is the ability to select a Leica lens profile within the app. You can choose from classic Leica focal lengths like the 28mm or the 50mm, and the app adjusts the field of view and rendering characteristics to match that lens’s optical signature.

If you’ve ever shot with a 50mm on a mirrorless or DSLR and loved how it rendered subjects, this gives you a version of that feel on your phone. The 28mm works well for environmental shots and street photography. The 50mm tends to suit portraits and tighter compositions. Pick one and stick with it for a full shoot before switching, because consistency helps you actually learn the look rather than just chasing something new.

Step 4: Use the App in Real Shooting Conditions, Not Just Test Shots

Filming in smoky, backlit forest with atmospheric light Filming in smoky, backlit forest with atmospheric light McKinnon shoots throughout this tutorial in genuinely challenging lighting: a smoky outdoor scene with strong backlighting and hazy atmosphere. He’s not testing the app in a clean studio. He’s using it in the exact conditions where phone cameras typically struggle most, harsh contrast, mixed light sources, and unpredictable shadows.

When you try Leica Lux for yourself, don’t start with a controlled, easy scene. Take it somewhere your Apple camera has failed you before. A bright window with a dark interior. A golden hour scene where the sky always blows out. That’s where the difference in processing becomes visible and where you’ll actually learn what the app does differently.

Step 5: Compare the Output to What Apple Would Have Given You

Showing a photo that appears to be from an expensive camera Showing a photo that appears to be from an expensive camera McKinnon makes the point early that the images produced look like they could have come from a camera costing several thousand dollars. That’s a strong claim, and the honest version of it is this: the rendering style, the color science, and the tonal handling are closer to what you’d expect from a dedicated camera than from a default phone camera app.

After your first shoot with Leica Lux, pull up the same scene shot with Apple’s camera and compare directly. Look at shadow detail, highlight rolloff, and how skin tones or natural textures are handled. The differences are subtle in some conditions and striking in others. Training your eye to see those differences is itself a valuable photography skill.

Step 6: Reconsider What “Best Camera” Actually Means for Your Workflow

Peter reflecting on what camera he actually uses day-to-day Peter reflecting on what camera he actually uses day-to-day McKinnon is honest that his camera bag contains professional gear but that his camera roll is mostly phone shots. The phone is the camera that’s always there. His reasoning for caring about Leica Lux isn’t that it replaces professional work, it’s that the moments captured on a phone deserve better processing too.

That mindset shift matters practically. If you’re a photographer who keeps a mirrorless camera for “serious” work, consider that your phone photos of everyday life might actually benefit more from a software upgrade than your professional workflow does. The images you take casually are often the ones with the most personal weight.

My Own Caveat: Give It Three Weeks Before You Judge It

I’ve been guilty of downloading apps, using them for three days, deciding they’re not magic, and going back to my defaults. Leica Lux is not magic. It’s a processing approach that requires you to actually look at your images afterward and develop an opinion about the difference.

After about three weeks of using it as my primary phone camera, including one Sunday photo walk where I forced myself to shoot only with Leica Lux, I started noticing that I reached for editing less. The images landed closer to what I wanted out of the gate. For me, that’s the real test. Not whether the app is impressive in a YouTube video, but whether it reduces the friction between the photo I took and the photo I meant to take.

The single most important takeaway from this tutorial is that your phone camera’s ceiling isn’t set by the hardware anymore. It’s set by the software processing layer, and that layer is now something you can change for less than the cost of a memory card. If you’ve been assuming your iPhone’s default camera is the best your phone can do, this tutorial is worth your time.

Watch the full tutorial on YouTube to see McKinnon’s actual sample images and hear his full reasoning on why computational photography is the real battleground for mobile cameras right now.