Smule

Smule's listing is built around one idea and states it early: singing is better together. The catalogue is the headline number, over 15 million songs, and the product is duets, which you can join for free with singers around the world or with recordings "inspired by" artists such as Ed Sheeran, Dua Lipa and Olivia Rodrigo. That phrase is doing careful work: these are recorded duets over an artist's track, not a live performance alongside them.

You pick a song, sing it with scrolling lyrics and pitch guidance, and the app's tools shape the result: reverb, vocal effects, filters, and a key adjustment so that a song fits your range. Duets are the core mode — adding your voice to an existing recording, harmonising, or building a group performance — and live karaoke sessions let you host or join in real time. Recordings can be turned into videos with visual effects and lyric overlays, and the listing mentions smart voice tools and optional AI-powered features for tone, texture and style. Its singers are described as being in over 190 countries, which is the company's figure and one we have not verified.

You can start free and the listing says so: joining duets costs nothing and you can sing with other creators right away. VIP is the paid tier and it is described in terms of what it unlocks rather than what it removes — recording solo, starting your own duets, and creating private group performances. That is a clear split, with free getting you into other people's songs and paid letting you start your own, and it is stated without the usual hedging.

There is no safety content in this listing at all — no moderation, no reporting, no age requirement and no encryption — which is worth pausing on for an app whose entire proposition is performing in front of strangers. The one control the page mentions is private group performances, and that sits behind the paid tier, so keeping a performance within a group you choose costs money. The listing also does not say who can see a recording by default, which is the first question a new user or a parent would ask. For a product built on sharing your voice publicly, the distance between how much is described about performing and how little about who is watching is the thing to notice.

People who want to sing and to hear themselves improve, and who like the asynchronous version of collaboration — adding a voice to a track rather than performing live with someone. Anyone who wants to keep a performance private should know that the control for it is on the paid side, and that the free experience is built around singing with strangers.

The most clearly described product in this batch: the free and paid split takes one sentence each, and the duet mechanic is explained well enough to know whether you want it. The artist duets are the draw and the wording around them is careful, because "inspired by" describes karaoke rather than collaboration. What the page does not cover is anything about who hears you — no moderation, no age requirement, and privacy that costs money, which is a great deal to leave unsaid for an app about performing.