IQOS ILUMA i FlexPuff: How It Adds Extra Puffs to Every TEREA Stick

By TEREA 365 Editorial · 29 November 2025 · updated 19 April 2026 · 7 min read

IQOS ILUMA i FlexPuff is the feature behind the extra puffs some TEREA sessions deliver, and this guide sets out exactly how it decides when to add them. You will find which ILUMA i models carry it, how to use it properly, and the habits that help or block it session after session.

IQOS ILUMA i FlexPuff: How It Adds Extra Puffs to Every TEREA Stick

What Does FlexPuff Actually Do on IQOS ILUMA i?

FlexPuff is a software feature built into the IQOS ILUMA i devices that changes how a session ends. Instead of cutting off at a fixed point, it reads your individual puffing pattern and works out, in real time, whether there is still usable tobacco left in the TEREA stick.

A standard IQOS session runs for up to 6 minutes or 14 puffs, whichever limit arrives first. When FlexPuff decides the stick has not been fully used based on how you have been drawing, it can add up to 4 more puffs, all still inside that same 6-minute window rather than extending the session itself.

Which IQOS ILUMA i Models Support FlexPuff?

FlexPuff currently ships on three devices only: the IQOS ILUMA i Prime, the flagship model with a touch screen; the IQOS ILUMA i Standard, a two-piece design that also carries a touch screen; and the IQOS ILUMA i One, the compact all-in-one version.

FlexPuff sits on top of the SMARTCORE INDUCTION SYSTEM technology that already runs across the ILUMA range, but that does not make it universal. The earlier IQOS ILUMA and IQOS ILUMA One devices, along with the older IQOS 3 DUO, use the standard fixed session only and have no way to add FlexPuff later.

IQOS ILUMA i One colours: Lime Green, Midnight Black, Orange, Blue, Digital Violet
IQOS ILUMA i Standard colours: Black, Orange, Violet, Blue
IQOS ILUMA i Prime colours: Black, Breeze Blue, Red, Aspen Green

How Does FlexPuff Work, Step by Step?

Through the session the device quietly tracks the length and strength of every draw you take. Once you reach the standard 14 puffs, its software checks whether the tobacco in the TEREA stick has actually been used up, or whether your particular draw style has left some of it unspent.

If tobacco remains, the device extends the heat cycle on its own and allows up to 4 extra puffs, with nothing for you to press or select. On the touch-screen models, the IQOS ILUMA i Prime and IQOS ILUMA i Standard, the screen confirms this is happening and the light ring extends anticlockwise as a visual cue that bonus puffs have kicked in.

The IQOS ILUMA i One has no screen, so there is no light-ring animation to watch. You get the same automatic boost when your draw pattern qualifies, but you will only know from the standard indicator lights and the vibration that marks the end of the stick.

How to Use FlexPuff on Your ILUMA i Device

FlexPuff needs no setup for a normal session. You insert a TEREA stick, start the device as you always would, and the feature runs in the background on its own.

IQOS ILUMA i Prime and Standard: start your session normally, then watch the touch screen and the anticlockwise light-ring extension to confirm extra puffs are being added; a subtle vibration also marks both the start and the near-end of the session
IQOS ILUMA i One: the feature triggers from the device's own internal monitoring, with no screen involved; rely on the standard indicator lights and the final vibration to know the stick is finished, and if your draw pattern qualifies the extra puffs arrive without any input from you

Puffing Habits That Help FlexPuff Add More Puffs

FlexPuff runs automatically, but your own draw technique still decides whether it has anything left to work with.

Draw slowly and gently, closer to a sip than a hard pull. Slower draws stop the coil from flooding and let the tobacco heat evenly, which makes it more likely FlexPuff finds spare tobacco to extend
Leave a 2 to 3 second gap between puffs. This gives the SMARTCORE INDUCTION SYSTEM time to reheat the tobacco properly, keeps the flavour consistent, and helps the device read the stick as not yet finished
Use fresh, sealed TEREA sticks. Ones that have been sitting too long, or left somewhere hot like a parked car, dry out and give up less vapour, which works against FlexPuff before the session has even started
Keep the device charged. FlexPuff itself is not a heavy power draw, but a low battery can push the device to prioritise the core heating over the smart features layered on top of it

What Stops FlexPuff From Activating?

A handful of habits and settings routinely block the extra puffs, and knowing them saves you wondering why a session ended early.

Pause Mode switched on: available on the IQOS ILUMA i Prime and Standard, Pause Mode and FlexPuff cannot run in the same session, so turning one on switches the other off for that session
Rapid, hard puffing: chain-pulling heats the tobacco too fast and unevenly, which reads to the device as a spent stick and ends the session before FlexPuff gets the chance to extend it
Counterfeit TEREA sticks: sticks that are not genuine IQOS TEREA lack the induction element and correct tobacco density the SMARTCORE system needs to read, so they may not heat properly at all and can also put your device's warranty at risk

FlexPuff Compared With an Older ILUMA Session

The real difference between an older ILUMA session and an ILUMA i session with FlexPuff is in how the ending is handled, not just the number on the counter.

End of session: older ILUMA models cut off at a fixed 14 puffs; ILUMA i with FlexPuff adapts, up to 18 puffs when your draw pattern qualifies
Flavour near the end: older models show a slight drop in flavour density on the closing puffs; ILUMA i keeps it smooth and consistent through to the finish
Puff count: fixed at 14 on older devices, versus a flexible 14 plus up to 4 extra on ILUMA i
Who sets the pace: older devices dictate exactly when the session stops; ILUMA i adjusts to your own drawing pace instead

Best TEREA Flavours to Pair With FlexPuff

FlexPuff works with every IQOS TEREA flavour TEREA 365 carries, though a few hold up particularly well through an extended session.

TEREA Yellow: light toasted tobacco with a soft zesty note, stays smooth and steady through the extra puffs
TEREA Turquoise: tobacco with clean menthol cooling, the menthol stays fresh right to the end
TEREA Bronze: rich tobacco with cocoa and dried fruit, the deeper notes carry further into the extended session
TEREA Purple Wave: mild tobacco with berry-like sweetness and light menthol, the sweet, fruity side stays balanced
TEREA Black Purple Menthol: strong menthol with a bold berry aroma, the intensity builds rather than fades once FlexPuff is active

Ordering an ILUMA i Device or TEREA Sticks From TEREA 365

TEREA 365 stocks the IQOS ILUMA i Prime, IQOS ILUMA i Standard and IQOS ILUMA i One, along with the TEREA flavours above, as an independent UAE retailer. We are not IQOS, TEREA, HEETS or their representative, simply a dealer who handles this stock every day.

To order, message TEREA 365 on WhatsApp at +971561652004 and pay cash or card when the order reaches you. Delivery runs 1 to 2 hours across Dubai, Sharjah and Ajman, and within 24 hours to the rest of the UAE.

Frequently asked questions

How do I use FlexPuff on my IQOS ILUMA i?

You do not need to activate anything. Insert a TEREA stick, start your session as normal, and FlexPuff runs in the background on its own. On the ILUMA i Prime and Standard, the touch screen and an extending light ring confirm it is adding puffs; on the ILUMA i One, the standard indicator lights and closing vibration are your only cues.

Does turning on Pause Mode affect FlexPuff?

Yes. Pause Mode, available on the ILUMA i Prime and Standard, and FlexPuff cannot run together in the same session. Switching Pause Mode on turns FlexPuff off for that session, so if the extra puffs matter more to you than pausing partway through, leave Pause Mode off and let FlexPuff work automatically.

Does FlexPuff drain the battery faster?

No, not by any noticeable amount. FlexPuff runs inside the device's existing optimised power settings, so while an extended session may run a little longer, the effect on a Pocket Charger's roughly 20-session capacity is minor, not something most users would notice across a normal day of use.

Can I switch FlexPuff off?

Yes. FlexPuff can be turned on or off at any time through the IQOS Web App, so if you prefer the fixed 14-puff session over the adaptive one, that option stays available to you. Most owners leave it on, since it only ever adds puffs to a session rather than removing any.

Why didn't I get any extra puffs this time?

Three common reasons: Pause Mode was switched on for that session, your draw was too hard or fast and the device read the stick as finished early, or your particular draw pattern simply did not leave enough tobacco unused for FlexPuff to activate. It works session by session, not on every single stick.

Is the IQOS ILUMA i price higher because of FlexPuff?

Not specifically. The price reflects the full set of features added across the i-series, including the touch screen on the Prime and Standard, FlexBattery and Pause Mode, not FlexPuff on its own. For current pricing on any ILUMA i model, message TEREA 365 on WhatsApp and we will confirm stock and cost.