Most digital pianos are bought to be practised on. The SING is bought to be used, which sounds like a marketing distinction until you notice how many instruments in a spare room stop being played after three weeks.
This review works from the manufacturer's own product documentation: what the instrument does, which two apps ship with it, what is genuinely different about it, and where the limits are.
If you are still deciding, the cheapest useful test is a single evening. Pick one song you already know, let the accompaniment carry it, and see whether you enjoy the result. That answer tells you more than any specification table, because the SING is the rare instrument bought for how it feels to use rather than for how it measures.
Short version: a portable, lit-key piano that generates its own accompaniment, built around singing and playing rather than repertoire.
What is the SING?
A portable smart piano built around singing and playing.
A portable lit-key smart piano that generates its own accompaniment, so you can sing and play real songs without first learning to voice chords.
Mechanically it is a portable instrument with built-in speakers and lit keys, and, like the rest of the range, it reports every key press to an app so the software can say which note to play next. What makes it a different product is the pairing of that hardware with an accompaniment engine: the app generates the backing from an intelligent chord sheet, the lyrics sync with the lights, and the player's job is reduced to pressing the lit key at the right moment and singing.
The instrument also carries a USB MIDI port, so it can be connected to a computer and used with recording software, and the sound set runs to 256 instrument sounds, selectable in both of the apps that support it.
The design logic is worth stating plainly, because it explains the product's compromises as well as its appeal. Everything that requires years of technique has been automated, and what remains is the part that is fun on the first evening.
Who is it for?
Singers who want accompaniment rather than chord practice.
Singers who want to accompany themselves, households where music is a social activity, and anyone whose living space rules out a fixed console piano.
The clear fit is someone who wants to sing and accompany themselves without spending a year learning to voice chords, and who would rather play real songs than study. It also fits a household where the piano is a social instrument rather than a solitary one, and anyone whose living situation makes a fixed console impractical.
The poor fit is a student working towards classical repertoire, who needs weighted keys and graded action to develop touch. The Sing Pro in the same range is the model built for that requirement; the SING is not pretending to be it. Anyone whose main goal is reading music fluently should also look at the learning side of the app range before deciding that the sing-along features are what they want.
What do the two apps do?
One accompanies the singing, the other teaches the piano.
One app accompanies the singing from a chord sheet, and the other teaches piano with lessons, sheet music and rhythm games.
The sing-along app is the feature. It presents an intelligent chord sheet that generates the accompaniment from the chords being followed, so the player is not building the harmony; the song library is updated weekly and covers a range of styles. Performances can be recorded and shared with the lyrics displayed on screen, which is the part that makes the instrument feel like an activity rather than a chore.
The second app is the learning app used across the whole range, with selected sheet music, beginner lessons and rhythm games available at no cost, a period of Premium bundled with the instrument, and an optional paid upgrade for the step-by-step beginner path. The Sing app guide covers the accompaniment in more detail, and the guide to learning from the instrument itself covers the other side.
The bundling is listed on the SING product page as twelve months of the sing-along app and three months of Premium on the learning app, with the paid upgrade available afterwards. Bundle terms have moved around across this range, so it is worth confirming on the product page at the time of purchase rather than trusting a review.
It is worth knowing which of the two apps you will actually open, because most buyers assume it will be the learning side and find that it is not. The sing-along app is what makes the instrument worth having on a Tuesday evening, and the learning app is what stops you plateauing at the same six songs. If you only ever use one, use the sing-along one: playing something you enjoy badly is a better foundation than practising something you dislike well. The two are designed to be used together, but only one of them is the reason to buy this instrument rather than any other.
The ONE SING specifications and what comes in the box
| Format | Portable smart piano with built-in speakers |
| Key lighting | Lit keys indicating the next note, synchronised with the lyrics |
| Sound set | 256 instrument sounds, selectable in both apps |
| Apps | Sing-along app plus the learning app |
| Recording | Performance recording and sharing through the app |
| MIDI | USB MIDI port for connecting to a computer |
| Bluetooth | Requires devices supporting Bluetooth BLE 5.0 or later; iOS 15.6+ and Android 7.0+ |
| Wired connection | Android 7.0 or later through USB Host or OTG |
The connection standards are worth checking before purchase if the phone is elderly: the requirement is a device supporting Bluetooth BLE 5.0 or later, on top of the operating system version. The underlying specifications are maintained by the Bluetooth SIG, and instruments that exchange note data with software use MIDI.
SING or Sing Pro
The honest summary is that the Sing Pro costs more and buys you weighted keys rather than features. Its specification lists 88 hammer-action weighted keys, red and blue light guidance where the blue lights mark the left hand, and four built-in speakers, while keeping the same sing-along accompaniment.
So the decision is about hands rather than about software. If the instrument is going to be used mainly for singing and playing songs, the lighter portable model does the same job. If it is also going to be someone's piano, with scales and pieces and the expectation of developing touch, the weighted keys are the difference that matters, and skipping them is the decision people regret a year later. The choice between the two is set out in the Sing app guide.
Whichever model, the same two practical points apply. Practising with headphones is the polite default in a flat, and headphone volume is worth keeping moderate because the hearing damage from listening is cumulative rather than dramatic, which is the mechanism set out in the NIDCD guidance on noise-induced hearing loss and addressed by the WHO listening-safety programme. And the reason an instrument like this tends to get played is social rather than technical, which is the point NAMM makes about participation in music.
There is a practical test that settles the choice faster than any comparison table. Sit at the instrument and think about what you want to do in six months. If the answer is singing along to songs you like, in your own room, with a few friends joining in, the SING does everything that requires, and the extra money buys nothing you will notice. If the answer is playing a piece properly, with dynamics and control, and possibly sitting an exam, then the weighted keys are the whole point of the upgrade. The mistake in both directions is the same: buying the instrument for the player you might become rather than the one you are.
FAQ
Do you need to be able to sing to enjoy the SING?
No. The accompaniment follows the song and stays in key, and the playing is reduced to pressing lit keys, so the instrument works for someone who would never sing in front of an audience. What it actually removes is the fear of the first attempt, because you cannot be badly out of tune against a backing track that follows you. If you can hold a tune in the shower, the SING will make you sound better than you expect within an evening, and that is the whole point of the design.
Is the SING good for learning piano properly?
It teaches songs and basic playing well, and the learning app supplies lessons, sheet music and rhythm games that develop real reading and timing. For technique, though, weighted keys matter, and the SING's action is lighter than a console piano's. If your aim is classical repertoire, graded material or touch control, the Sing Pro in the same range is the model built for that. Buying the cheaper model and expecting it to behave like a weighted piano is the mistake to avoid.
Which apps come with it?
Two: a sing-along app that generates the accompaniment from an intelligent chord sheet, and the learning app used across the range for lessons and sheet music. The SING product page lists twelve months of the sing-along app and three months of Premium on the learning app, with a paid upgrade available afterwards. Bundle terms have changed across this product line more than once, so confirm the current offer on the product page before buying rather than relying on this review or any other.
Can it be used as a normal keyboard for recording?
Yes. It has a USB MIDI port for connecting to a computer, and it offers 256 instrument sounds, so it can be used as a controller and a sound source rather than only as a sing-along instrument. That matters if you write music, because it means the piano can be the input device for a studio setup rather than a device that only works with its own app. The instrument also records through the app, which is enough for sharing a performance rather than for production work.
Verdict
The SING is a good purchase for a singer who wants to accompany themselves, and for a household that wants music to be something people do together rather than something one person practises. It is a poor purchase for someone who wants weighted keys and classical technique, and the price difference between it and the Sing Pro is really the price of that decision. Specifications, bundle terms and current pricing are on the SING product page.
Shipping and returns in short. TheONE ships free within the 48 contiguous United States, with orders usually processed in 1–3 business days and delivery estimated at 3–7 business days after dispatch. International delivery is estimated at 5–15 business days, with shipping and applicable taxes included in the price shown at checkout. Returns within the United States can be requested within 30 calendar days of receipt and require approval.
See the full specification and current bundle for the SING.
