4 powerful free and open-source Android apps you definitely haven’t heard of


Covering free and open source software has always had a degree of fun, but there was a time when we were starved for choice. These days, it’s just the opposite. There are many excellent open source apps out there, but without marketing budgets, it’s easy for these gems to fall through the cracks. Here are some of the ones I’ve been genuinely impressed by recently.

Like most open source Android apps, you can find each of these in F-Droid—Android’s defacto home for FOSS mobile apps. Still, I’ll link to the Play Store where possible.

Lotus

A gorgeous music player that could have come straight from Google

Most of us open a music streaming app when we want to play an album, but with those major platforms, none of us have a say in which app we use. Things are different for those of us who have our own library of downloaded MP3s. Our storage is filled with thousands of files, and we need an app powerful enough to not only play them, but preferably do so instantly, while also looking good in the process.

There are many open source music players I can point you toward. I used Auxio for years, and I’ve since been quite impressed by Symphony, but Lotus is my current go-to. This deceptively simple app fully embraces Android’s Material 3 Expressive design language, offering large buttons and plenty of white space. Yet behind that facade, there is a powerful music player that not only allows you to toggle an equalizer and customize the interface, but it can also display lyrics.

You won’t find Lotus in the Play Store, so head over to the Lotus F-Droid page for the download.

PhotonCamera

Higher quality photos than you typically get from open source camera apps

I have these apps installed on my repairable Murena Fairphone 6 running a /e/OS/, a de-Googled version of Android. While the phone does come with Fairphone’s version of the camera app, de-Googling your phone often means taking a hit in camera quality. Fortunately, PhotonCamera can take photos that look like those you once had to leave behind.

I have a Google Pixel 10a on hand for testing. Out of the box, there is a noticeable difference in quality between the photos that come out of the Pixel 10a and the Fairphone 6. Yet when I take photos using PhotonCamera, the gap is small enough that it’s largely a non-issue. PhotonCamera isn’t perfect. It takes a moment longer to capture a shot and do all the processing, but it’s still fast enough to be the app I default to when double-tapping my phone’s power button.

Murena Fairphone (Gen. 6)

Brand

Murena

Display

6.31 inches

The Murena Fairphone (Gen. 6) is the perfect option to bring together privacy and sustainability. Powered by the /e/OS operating system, the Fairphone (Gen. 6) protects you and your data at all times, while at the same time protecting the planet.


You’ll not only need F-Droid to download this one, but the third-party IzzyOnDroid repo as well.

A powerful photo management app for your phone

There’s no such thing as one-size-fits-all, especially when it comes to gallery apps. While I’m quite content with a simple camera roll with limited options to crop and rotate, there was a time not that long ago when such an app would have been too simple for me, and I know many will only consider ditching Google Photos for a similar self-hosted alternative. If you merely want a local gallery app with all the bells and whistles, Aves Gallery should be one of the first options you consider.

Aves Gallery can display detailed metadata, supports all kinds of album organization, handles geolocation, and supports tags. You can modify the interface in all manner of ways, and it also doubles as a video player. Give this a go if you feel Fossify Gallery has become a bit too basic. That said, don’t expect AI features. When I say all the bells and whistles, I don’t mean the new bells or the new whistles.

Grit

A task and habit tracker with style

Not too long ago, if you had asked me to recommend a to-do list app, I’d point you toward Tasks.org. That app is still around, and it remains a solid choice, but the field has diversified. I’m currently intrigued by Grit, a to-do list app that also helps you stay on top of habits. Think of the tasks that you want to do every day, like drinking more water or taking up journaling. You can set recurring reminders for these, check them off, and view your streaks.

While there’s nothing stopping you from making a recurring task in any to-do list app, I like the presentation here. This is an app that feels great to open on my phone. That matters a lot when we’re talking about a piece of software that is ultimately tasked with helping me keep track of the more mundane aspects of life.


Searching for free and open source apps sparks a different kind of joy

It has been a long time since I felt any excitement when opening the Play Store. Too many of the apps are manipulative and exploitative, designed to maximize attention or collect information. But open source apps? They’re just intended to be useful and fun. They put the enjoyment back in using my phone, and I hope they do the same for you.



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“It was severely downgraded,” Gilbert confirms. “I never would have found it if I was just looking through Google results.” (I tried the same prompt in Gemini earlier this month, and after an initial denial, the tool also gave me Eiger’s number.)

After this experience, Eiger, Gilbert, and another UW PhD student, Anna-Maria Gueorguieva, decided to test ChatGPT to see what it would surface about a professor. 

At first, OpenAI’s guardrails kicked in, and ChatGPT responded that the information was unavailable. But in the same response, the chatbot suggested, “if you want to go deeper, I can still try a more ‘investigative-style’ approach.” Their inquiry just had to help “narrow things down,” ChatGPT said, by providing “a neighborhood guess” for where the professor might live, or “a possible co-owner name” for the professor’s home. ChatGPT continued: “That’s usually the only way to surface newer or intentionally less-visible property records.” 

The students provided this information, leading ChatGPT to produce the professor’s home address, home purchase price, and spouse’s name from city property records. 

(Taya Christianson, an OpenAI representative, said she was not able to comment on what happened in this case without seeing screenshots or knowing which model the students had tested, even after we pointed out that many users may not know which model they were using in the ChatGPT interface. She also declined to comment generally about the exposure of PII by the chatbot, instead providing links to documents describing how OpenAI handles privacy, including filtering out PII, and other tools.) 

This reveals one of the fundamental problems with chatbots, says DeleteMe’s Shavell. AI companies “can build in guardrails, but [their chatbots] are also designed to be effective and to answer customer questions.”

The exposure issue is not limited to Gemini or ChatGPT. Last year, Futurism found that if you prompted xAI’s chatbot Grok with “[name] address,” in almost all cases, it provided not only residential addresses but also often the person’s phone numbers, work addresses, and addresses for people with similar-sounding names. (xAI did not respond to a request for comment.) 

No clear answers

There aren’t straightforward solutions to this problem—there’s no easy way to either verify whether someone’s personal information is in a given model’s training set or to compel the models to remove PII. 



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