Double Bubble app guide

Double Bubble app: the slot vs the bingo brand

Searching for a Double Bubble app throws up two different things. One is Double Bubble Bingo, a bingo and slots brand with its own app, which we profile neutrally on our Double Bubble Bingo app page. The other is the slot itself, a game created by Gamesys, the British studio and operator that became part of Bally’s Corporation in 2021. Some listings credit Roxor Gaming for later builds of the game; whichever name appears, the core mechanics described here are the same.

The slot isn’t available as a standalone real-money app. It runs inside casino and bingo apps that have licensed it, and you play from your normal account balance. It has been a fixture of British bingo sites for years, which explains its friendly look: bright colours, bubbles and simple fruit-style symbols rather than a story-led theme.

How Double Bubble looks on your phone

In portrait, the 5 × 3 reels take up the middle of the screen with a horizontal strip of bubbles underneath: that strip is the bubble line, and it’s easy to miss on a small phone if you only watch the main reels. The stake and spin controls sit at the bottom. Landscape spreads the same elements across a wider area and makes the bubble line easier to follow.

The bonus game is built around tapping bubbles, so it suits a touchscreen well. On larger phones you can play it one-handed in portrait; on compact phones, our small screen phones guide has tips for avoiding accidental taps near the spin button.

How to play Double Bubble in a casino app

1. Open your casino or bingo app and log in.
2. Search “Double Bubble”. Several versions may appear, so open the one simply called Double Bubble for the classic game.
3. Open the paytable or help screen to check the RTP and how the bubble line multiplier works in this version.
4. Set your stake. In versions with adjustable lines, playing all 20 maximises the bubble line multiplier.
5. Tap spin. Each spin lasts at least 2.5 seconds in Great Britain, with no autoplay.
6. Watch both the main reels and the bubble line beneath them for wins.

If you’re new to slots on a phone, our step-by-step guide on how to play slots on your phone covers bet panels, paytables and game history in more detail.

Double Bubble features explained

The wild

The Double Bubble logo is the wild symbol. It substitutes for regular symbols to complete line wins, but not for the bonus symbol. It is also the most valuable symbol on the paytable when it lands in a full line on its own.

The bubble line

Beneath the reels sits a row of bubbles. Symbols occasionally appear inside them and pay according to the paytable with a multiplier. In common versions, that multiplier is linked to how many paylines are active, rising to 22x with all 20 lines in play. This is the main reason to keep every line active: reduce the lines and you reduce what the bubble line can pay.

The bubble bonus

Three bonus symbols in one spin start a pick-style mini game. Bubbles float on screen and you tap one to pop it and reveal a prize. Because the bonus always pays something once it starts, it’s a gentler feature than the free spins rounds in most modern slots. On a phone it takes a couple of taps and lasts only a few seconds.

Double Bubble versions you might see in an app

Because the game has been popular for so long, there are several spin-offs, including jackpot versions. They share the bubble theme but have different reels, features and RTPs, and the maximum win varies by version. That’s why we don’t quote a single figure for it.

When you search an app and see more than one Double Bubble tile, open the help screen in each one before staking. The game name, RTP and feature list are always there. Our guide to jackpot slots apps explains how jackpot editions differ from standard slots.

Double Bubble RTP and volatility in real terms

The published RTP for the classic game is 96.02%, though some casinos may run alternative versions. Check the help screen in your app to confirm. Volatility is generally rated medium: wins come along reasonably often, mostly small, with the bubble line and bonus adding variety. Some reviewers describe it as higher, so don’t treat the rating as a promise.

Low stakes are part of Double Bubble’s appeal on bingo sites; with 20 lines, a 1p line bet costs 20p a spin. Even so, the average cost adds up over time, and any session can end below the average. Treat it as the cost of entertainment and set limits before you start.

UK rules that apply to Double Bubble on mobile

• Online slot stakes are capped at £5 per spin for players aged 25 and over and £2 for those aged 18 to 24.
• No autoplay or quick spin, and each spin takes at least 2.5 seconds.
• No feature buy for the bubble bonus.
• Your balance and net position are shown during play.
• Play-money demos need a verified account first.

The same rules apply whether you play in a casino app or a bingo app. Our UK casino app rules guide explains each one and when it started.

Double Bubble vs other British bingo-site favourites

Fluffy Favourites and Rainbow Riches are the other long-running staples of UK bingo and casino apps. Starburst is a lower-volatility option if you want frequent small wins.

Double Bubble on a phone: pros and cons

Where to play Double Bubble on your phone

Search for Double Bubble in any licensed app before depositing, since not every casino carries it. Partner offers below are for new players aged 18+ and terms apply: Casumo matches 50% of a £20+ first deposit up to £100 (10x wagering within 7 days), Coral gives 100 spins at 10p on selected games after £10 staked on slots, and 10bet matches 100% up to £25 (10x within 3 days). Our slots apps guide compares more options.

18+. Gambling should be entertainment that costs money, not a way to make it. Set a deposit limit before you play: how to set limits. Free, confidential help: National Gambling Helpline 0808 8020 133.