Jammin’ Jars

Jammin’ Jars Slot Review

Slot Provider: Push Gaming

RTP: 96.83% | Variance: High | Maximum Win: 20,000x

Our Score: 7.6

Play at Grand Ivy Casino
QUICK LINKS: Game Information | Where To Play | Full Review | Testing Notes | Tips For Players | About The Developer

WHY YOU CAN TRUST THIS REVIEW: The information and opinions on this page are the result of an comprehensive process of information gathering and live game testing by the gambling experts who work at allslotsites.com. Find out more here.

About Jammin’ Jars

Reviewed by:

Published Date: 23rd July 2024

How We Review Slot Games

We test and rate all slot games across 5 criteria, assigning a score out of 10 for each and an overall score that is an average of the 5. To build an accurate assessment of each game we gather information from the supplier and play in real play or demo mode. Find out more.

Jammin Jars by Push Gaming is a classic slot that you’ll find at the majority of online casinos. Its fun disco theme plays out on an 8×8 grid with a cluster pays mechanic. Jam Jar wilds roam the grid with increasing multipliers and a free spins round gives you a shot at the 20,000x max payout. With an RTP of 96.83% this is a generously paying slot, with a £0.20 minimum bet.

Jammin’ Jars Game Information

  • Release Date: 18.09.18
  • RTP: 96.83% | 95.25% | 90.45%
  • Variance: High
  • Maximum Win: 20,000x
  • Progressive Jackpot: No
  • Reels: 8
  • Rows: 8
  • Minimum Stake: £0.20
  • Theme: FruitMusic
  • Features: Cascading WinsFree SpinsMultipliersWilds
  • Format: Cluster Pays

Testing Notes: Here’s What Happened When We Played Jammin’ Jars

IMPORTANT: To give you an accurate assessment of the games we review our writers play 200 spins. Whilst this is a useful tool to help us review games and to give an example of what might happen when you play, keep in mind that 200 spins is only a very small sample and cannot be used to accurately predict what might happen over another 200 spins. The outcome of all slots play is always random.

Boom Or Bust? Our Session By The Numbers

Test spins and results analysis by Mark Wadie.

Results from 200 spins with real money on Jammin’ Jars at Casumo.

  • Stake Size: £0.2
  • Start balance: £972.80
  • End balance: £999.30
  • Hit Rate: 26% (52 winning spins in 200)
  • Biggest Win: 190.05x
  • Free Spins Round: 1

Jammin’ Jars took a while to warm up but it did deliver a couple of good wins towards the end of my 200 spins. It’s got a really fun feel to it with all those bright fruits, disco balls and the funky guitar soundtrack. The win rate came in at 26% which isn’t bad at all, but symbol values for smaller clusters are not great so a lot of those were small in value and the balance ran down fast. The wild jars turn up frequently, but don’t always produce wins. And the rainbow feature that re-sets the grid after a non -winning spin only appeared twice, and with little affect.

Wild Multipliers in Jammin Jars
Two 7x Wild Multipliers

Like all cluster pays slots it’s about building sequences of wins with avalanches, and in this case building bigger multipliers on the wild jars. In theory that’s easier in the free spins round where they stick. I had one shot at that with a 33.7x win from 6 spins with 3 jars in action, with two 7x’s a 5x multiplier by the end of the round. However, it was actually the base game that produced the best win overall, a 190.05x win – £38.01 from 20p stake – thanks to two 7x multiplier jars. If you can get them next to each other or close, you have more chance of building clusters, and it’s easy to see how the game can escalate fast.

Big Win In Jammin Jars
190.05x win from 2 7x multiplier wilds

Of course Jammin’ Jars can go much, much higher than that, but this was still a good taster. It’s a simple game with a nice look and not surprising it’s one of Push’s most popular.

What We Liked

  • Bright, upbeat design and fun theme
  • Roaming multiplier wilds can boost your wins
  • Rainbow feature can turn non-winning spins into winners
  • Jam Jar Wilds stick in free spins to grow multipliers even higher
  • Big 20,000x payout potential

What We Didn't like

  • Low RTP at some slot sites

Jammin’ Jars Review Scores

  • Theme and Design 7
  • RTP and Variance 8
  • Maximum Win 8
  • Symbols and Paytable 7
  • Features and Gameplay 8

What Our Reviewer Says ...

"Deserving of its place as one of Push Gaming's best slots thanks to upbeat production and simple but fun gameplay"

Overall Score: 7.6

Theme & Design

Our Score 7

With a funky disco background and colourful fruits on the reels, this slot is visually stunning. It’s bright and bold with a glowing backdrop, complete with a sparkling glitterball. Of course, the slot also features a classic disco soundtrack. Whether you actually grooved your way through the 80s or you’ve just always fancied it, you’ll struggle not to tap your foot to the beat. 

Jammin Jars by Push Gaming
Jammin Jars – disco vibes!

There are plenty of other disco themed slot games, but Jammin Jars and its sequel Jammin Jars 2 have arguably taken the (dancing queen) crown as the favourites of this genre.

RTP and Variance

Our Score 8

What is RTP?

RTP (Return to Player) refers to the amount a game will pay out in cash prizes expressed as a percentage of all the money wagered on that game. For example, a 96% RTP means a game will pay out £96 for every £100 wagered. This is an average number and will vary from one session to the next.  Read more here.

What is Variance?

Variance refers to how far a game will deviate from its RTP over time. High variance games deviate a lot and produce uneven win distributions and unexpected windfalls. Low variance games provide a more stable and even distribution of wins. Read more here.

The default RTP of 96.83% is excellent. Push Gaming is fairly well known for their high RTP slots and this one doesn’t deviate from the script one bit. The volatility is high, really high. For big win chasers this isn’t bad news, but for those on a tight budget, something with smaller swings might be a better choice. This selection of Rock n Roll slots has a variety of different RTPs and volatilities, providing plenty of choice for music-loving players.

Push Gaming have created versions of Jammin Jars with lower RTPs – 96.83%, 95.25% and 90.45%. Some UK slot sites may run the game at less than optimum rate. Check on the game rules page once you load up the game to see what rate your casino has chosen.

Maximum Win

Our Score 8

What Is Maximum Win?

Maximum win refers to the maximum amount a player can win from one spin. It is expressed as a multiple of the stake. For example, where the maximum win is 100,000x, from a £1 stake, the maximum win would be £100,000.  

The top payout of 20,000x your win is above average for a slot of this RTP. Part of this slot’s runaway success has been the big wins its handed out, so those looking for a huge payout are in the right place.

Symbols and Paytable

Our Score 7

Played on an 8×8 grid, Jammin Jars has a cluster pays mechanic. This means that there are no predefined paylines, but rather you can make a win anywhere on the grid. Clusters are made by at least 5 matching symbols touching horizontally or vertically. 

There are six pay symbols as well as a wild symbol. All of the pay symbols are fruit and in order of lowest value to most premium are: blueberry, plum, apple, raspberry, orange, and strawberry. The blueberry pays out 10x your stake for 25 or more, while the strawberry pays out 100x your stake for 25 or more.

Jammin Jars Paytable
The paytable with 100x for 25+ strawberries

The wild is the rainbow jam jar and can substitute for any pay symbol to make wins.

Features and Gameplay

Our Score 8

Jammin Jars is a fairly straightforward game, but does have some mechanics that make the gameplay more exciting. Let’s take a look at how they all work in-depth.

Avalanche Wins

After every winning spin, all of the symbols that made up the cluster are removed and new ones drop in (like an avalanche) to replace them. If you make another win then these symbols are removed and new ones drop in, until eventually, no new winning combination can be created. At this point, the total payout is calculated. 

Multiplying Wild Jam Jars

There are what makes the game.

If a wild jar is part of a winning cluster then instead of being removed for the avalanche it will instead move to an adjacent position. This process repeats if the wild is part of another cluster from the subsequent avalanche.

The wilds also come with multipliers which increase by 1x every time they form part of a winning cluster. If  multiple wilds are included in a cluster then their multipliers are added together before being applied to the total payout. And at the end of the avalanche sequence then wilds are removed for the next spin.

Rainbow Feature

If you don’t land a winning spin then don’t panic, you could unlock the rainbow feature. This only happens after non-winning spins, but it happens at random. A rainbow appears on the reels and generates an enormous fruit. If any of the symbols next to it match this fruit, then it makes a winning cluster. 

Rainbow Feature in Jammin Jars
Rainbow Feature

Free Spins Round

In this game, the jam jar wilds also act like scatters. If you land three or more of them in the same spin then you trigger the free spins round. You begin the round with 6 free spins and all of the same mechanics as usual in place. However, the jam jar wilds and their multipliers will stay in place for the duration of the whole free spins round, allowing you to collect much larger multipliers.

The Final Verdict

Jammin Jars was practically a classic the second it hit online casinos in 2018. The graphics are bold and bright, the theme is fun, and the gameplay is simple. The RTP of 96.83% is really pretty generous and that max win is tantalizing. 

Those who like in-depth slot games with dozens of features and mechanics probably won’t feel at home here. However, players who enjoy exciting multipliers and a simple-to-understand slot will love it. The high volatility could be a hindrance to those on a tighter bankroll, but it does make way for larger wins, which can be no bad thing.

Useful Tips When Playing Jammin’ Jars

Remember, online slots are games of chance, there is NO strategy that can improve your odds of winning. However, reading our review and following these tips will help you get the most out of your time playing this slot game.

1. Look For Jam Jar Wilds

These are the powerful symbols that drive all the best stuff. Remember, their multipliers grow each time they are used in a cluster win.

2. Three Jam Jars Triggers Free Spins

And if you land 3 on one spin you’ll enter the free spins feature where wilds stick. That’s your best chance of hitting that 20,000x max win.

3. Play Low Stakes

This is a high volatility slot so it can burn your balance down without much return. Choose a low stake to avoid an early exit!

4. Play At Our Recommended Slot Sites

We have chosen the sites on this page because they all scored high in our reviews and they are licensed by the UK Gambling Commission. That makes them fair and safe places to play slots.

Who Made Jammin’ Jars?

  • Name: Push Gaming
  • Established: 2010
  • UK License: 54984
  • Total Games: 30 +
  • Known For: High variance grid slots, smart artwork, high max win slots
  • Popular Slots: Big Bamboo, Mad Cars, Razor Returns, Fat Rabbit
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