Trevni User Reviews

Trevni: Film Negative Inverter

James Moore

📊 Productivity

📷 Photo & Video

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Really useful

Great app. I use it with my light table to preview before printing in my enlarger. I wish it had a straightening option, so I could pick my image corners and have corrections.

Nathanprice

2 months ago

Response from developer

Thanks so much. Really glad to hear Trevni is fitting into your darkroom workflow. That’s a great shout on straightening and corner correction too, especially when working from photographed negatives on a light table. Definitely something I’d like to explore in a future update.

Fast gut

Bitte auch eine Version für das iPad bereitstellen. Aufgrund der Größe und besseren Sichtbarkeit der Negative.
Ich verwende die iPhone Version auf dem iPad, jedoch wird das Karusell nicht dargestellt.

6Lupine6

6 months ago

Response from developer

Vielen Dank für das durchdachte Feedback, das ist sehr hilfreich. Du hast völlig recht, dass die Arbeit mit Negativen von einem grösseren Display profitiert, und es freut mich zu hören, dass du die App bereits auf dem iPad nutzt. Dass das Karussell auf dem iPad nicht angezeigt wird, ist nicht das erwartete Verhalten, das werde ich mir genauer ansehen. Eine native iPad-Unterstützung ziehe ich aktiv in Betracht. Vielen Dank, dass du dir die Zeit für dieses Feedback genommen hast.

Greatest app I have ever found

This app is hands down the best I’ve found for converting negatives into high-quality digital photos. Whether I’m working with old black-and-white rolls or color film, the results are consistently accurate, sharp, and true to the original. The color restoration is impressive—no strange tints or washed-out tones—and the black-and-white conversions retain beautiful depth and detail.

What really sets this app apart is its ability to balance precision with ease of use. The scanning and inversion process is smooth, and the built-in correction tools allow fine adjustments without needing extra software. It feels like having a darkroom in your pocket, but faster and more reliable. If you’re serious about preserving old film memories with professional-quality results, this app delivers. It doesn’t just digitize negatives—it brings them back to life. Having processed several thousand negatives with this app, I can confidently assert that the latest update has greatly improved its overall performance. The enhancements have introduced a more streamlined workflow and elevated the user experience, making it easier than ever to achieve exceptional results.

Peter Santoro

6 months ago

Response from developer

Thank you so much for this. I’m really happy to hear the results have been consistent across both colour and black-and-white film. It means a lot that the balance between quality and ease of use is working well for you. “A darkroom in your pocket” is exactly what I was aiming for. Thanks for the thoughtful review and support!

Looks good - doesn't help

The UI looks simple and good. But it doesn't really help.
I can't take pictures directly from the app - I'd even expect a (nearly) live conversion of what I can see via camera. You need to take pictures separately (or have them already in your photo gallery. You need to give full access to your Photos gallery (seems that you can only change allowances via iOS settings.
Annoying. Wasted 2,99 €

axl.r

6 months ago

Response from developer

Thanks for the review and you’re right... Trevni currently works with existing photos rather than offering in-app or live camera capture, and I'm sorry that wasn’t clear enough upfront. I understand how that gap can make the app feel unhelpful, especially if you’re looking for a more immediate, camera-first experience. I’m actively improving onboarding, photo access handling, and exploring in-app capture so the workflow feels clearer and more useful from the start. Your feedback directly shapes where Trevni goes next. Thanks for giving it a try and for taking the time to call this out. — UPDATE 26 NOV 2025 — The app now uses a new photo access approach: it does not have general photo access and only has write permission to save images. Loading a photo is a one-time, user-initiated permission action for that image alone and fully respects iOS privacy controls. I’ve also fixed an issue where selected images could fail to load when using Limited Access. I do hope you’ll consider Trevni again as part of your workflow, and please feel free to get in touch if you have any questions or feedback.

Worthless

Not intuitive and you have to import images of your negatives to use this. Wish I hadn’t spent $1.99 on this waste of time. Quality of image was abysmal.

jbing

9 months ago

Response from developer

Thanks for the feedback. This app is designed to work with already-photographed or scanned negatives, which I clearly need to explain better in the description. I’m sorry it wasn’t what you expected.

Best $1.99 spent

I was using an app with an inverted filter and I also used an app that scans negatives but they don’t compare to this app. It’s so easy to use and easy to adjust the photos. I love it.

n0jay

10 months ago

Response from developer

Thank you so much for the kind words and support! I’m really glad you’re enjoying the app and finding it easy to use. It means a lot to hear it compares so well to other tools, and that the adjustment controls are useful for your workflow.

Greatest app I have ever found

Peter Santoro

a year ago

Response from developer

Todor R.

A fantastic app with impressive attention to detail. I was going through a pile of old negatives, and Trevni made it incredibly easy to bring those forgotten moments back to life, and share them with loved ones. It brought smiles to many faces, including mine. Highly recommend!

Todor Rusanov

a year ago

Response from developer

Thanks for the recommendation and support! I’m really glad the app helped bring those memories back to life and made sharing them easier - that’s exactly what it was built for. Hearing that it brought smiles truly means a lot.

Easy to use, got exactly everything I need

Discovered film photography a while ago but only recently started developing my own film and open the door of a brand new world.

It’s an amazing feeling coming out of the darkroom with my negatives, and knowing I’ll be able to see them immediately using this app. It contributes to the joy even more. It’s designed so lite and simple to use, can’t even feel like using something digital in an analogue photography process.

Load photo-sample color- save. Whole thing takes 3 seconds and that’s it.

For me there are 3 magical moments in the film development process:
1. Take negatives out of the development tank and knowing there is time captured on these stripes.
2. Invert negatives. Start feeling proud of yourself looking at the images.
3. Enlarge and print. Watch a white paper transforming into a vivid picture.

And with this app, the 2nd moments became so enjoyable!

Nah iY

a year ago

Response from developer

Thank you so much for sharing this, it really means a lot. I love how you described those moments in the film process! Keeping it light, simple, and true to the analogue workflow was exactly the goal. Thanks for the thoughtful review and support!