twiist AID System: A Complete Guide to the Newest Insulin Pump (2026)

The insulin pump landscape just got a new entrant — and the T1D community is paying close attention. The twiist™ Automated Insulin Delivery (AID) System by Sequel Med Tech launched in the US in July 2025, bringing something the space hasn't seen before: a pharmacy-based subscription model, Tidepool's open-source Loop algorithm in a commercial product, and acoustic insulin measurement technology that detects blockages up to 9x faster than competing systems.

If you've been hearing about twiist and want to understand exactly what it is, how it works, what makes it different, and yes — what accessories and pump patches work with it — this is your complete guide.

Written by Emily Imblum, Co-founder of Pump Peelz and T1D since 2010. Updated March 2026.

What Is the twiist AID System?

The twiist™ AID System is an Automated Insulin Delivery system made by Sequel Med Tech, a company built specifically around the technology. At its core, twiist combines three components:

• The twiist pump — a compact tubed insulin pump powered by DEKA's acoustic insulin measurement technology
• The twiist Loop algorithm — a commercial version of the community-built Tidepool Loop algorithm, FDA-cleared and powered by Tidepool
• A compatible CGM — currently FreeStyle Libre 3 Plus or Eversense 365

The system is approved for people with type 1 diabetes ages 6 and up and requires a prescription. It launched commercially in the United States on July 7, 2025.

The name "twiist" comes from the twist motion used to open the device — and the double "ii" stands for intelligent insulin. The lowercase "t" is intentional: the brand says it fits the pump's small, sleek design philosophy.

twiist At a Glance: Specs and Key Details

How Tidepool Loop Works in twiist

The algorithm powering twiist has one of the most interesting origin stories in diabetes technology. Loop started as a DIY, open-source project built by people with diabetes and their families — people who were frustrated with the limitations of commercial systems and decided to build their own. The nonprofit Tidepool took that community-built algorithm, ran it through the FDA approval process, and it became the first community-developed, FDA-cleared AID algorithm.

twiist is the first commercial pump built from the ground up to run that algorithm.

Here's how twiist Loop works in practice:

• Every 5 minutes, it reads your CGM glucose value and recent trend
• It factors in your personal settings (correction target, insulin sensitivity, carb ratio), current insulin on board, and your carb history
• It builds a 6-hour glucose forecast based on all of those inputs
• Based on that forecast, it automatically adjusts basal insulin delivery upward, downward, or suspends it entirely — working to bring glucose to your target without you having to do anything
• When glucose is predicted to exceed your threshold, it can recommend a correction bolus (you confirm it before delivery)

What Makes twiist Different: Key Features

iiSure™ Sound Wave Technology

This is one of twiist's most technically distinctive features. Most insulin pumps detect blockages (occlusions) using pressure sensors or by counting motor steps — indirect methods that can lag behind an actual blockage by a meaningful amount of time. During that lag, glucose can rise dangerously.

twiist uses acoustic (sound wave) technology to directly measure the volume and flow of insulin at four checkpoints during every dose. It knows not just how much insulin was commanded, but how much was actually delivered. This makes blockage detection up to 9 times faster than other AID systems — so you can take action before a missed dose becomes a significant glucose spike.

The Widest Glucose Target Range Available

twiist allows you to set your correction target anywhere from 87 to 180 mg/dL — the widest range of any AID system currently on the market. For comparison, Omnipod 5's minimum correction target is 110 mg/dL. That 23-point difference is meaningful for people who want to run tighter control or who have a lower personal threshold for what "in range" means.

Retroactive Carb Editing

One of the most practically useful features for real-world eating: you can update your carb entry before, during, or even after a meal. Ate more than you thought? Ate less? Changed your mind about dessert? You can go back and adjust, and twiist's algorithm will recalculate accordingly. This is a significant usability improvement over systems where a carb entry is locked in at bolus time.

Food Type Presets

Different foods raise glucose at different rates — a banana hits differently than a bowl of pasta, which hits differently than a slice of pizza. twiist lets you select food type (fast, medium, or slow-absorbing carbs) to optimize insulin timing and delivery curve for what you're actually eating. This kind of nuance has historically been a manual workaround for experienced pumpers; twiist builds it into the interface.

Apple Watch Control

twiist is the first FDA-approved AID system that can be fully controlled from an Apple Watch — including bolus delivery and carb entry. This is meaningful for discretion, convenience, and situations where reaching for your phone isn't practical (during a meeting, a workout, a swim). The pump can communicate with the watch from up to 33 feet away.

Compact 300-Unit Capacity

At under 2 ounces, twiist is the smallest available pump with a 300-unit reservoir. For context, the minimum basal rate is 0.1 units/hour and basal rates can be set in 30-minute intervals throughout the day. The pump body itself is reusable for up to 3 years; only the reservoir is disposable.

CGM Compatibility: What Works With twiist

As of early 2026, twiist is compatible with two CGM systems:

The addition of the Eversense 365 in 2026 is a significant differentiator — no other commercial AID system currently supports the year-long implantable CGM. For people who want to minimize the frequency of sensor changes, this pairing is unmatched.

Dexcom CGM compatibility has not been announced as of this writing. iPhone users who currently use Dexcom G7 with another pump will need to be aware of this when evaluating twiist.

twiist vs. Other AID Systems: How It Compares

How to Get twiist: Pricing and Access

Sequel Med Tech built twiist specifically for pharmacy availability — a model that's significantly more accessible than traditional DME (durable medical equipment) contracts used by most insulin pump companies.

Through the twiist Savings Program:

• Eligible patients with commercial insurance can receive the Starter Kit for $0
• Refill Kits are available for a maximum of $50/month
• The system is designed to be covered by most commercial insurance plans
• No long-term DME contract required

For those not covered by the Savings Program, the pay-as-you-go pharmacy model still aims to remove the barrier of a large upfront DME commitment. Call 1-877-4twiist (1-877-489-4478) or visit twiist.com to check your specific coverage.

Wearing twiist: Your Options Right Now

Because twiist is a tubed pump (unlike tubeless options like Omnipod), the device itself clips to clothing, fits in a pocket, or can be worn on a belt — similar to how traditional tubed pumps have always been worn.

On-body adhesive wear is officially in development by Sequel Med Tech, which will allow users to wear the pump directly on the skin similar to how a pod system sits on the body. This is one of the most anticipated updates from the twiist community.

In the meantime, many twiist users are exploring their own carry solutions — pump clips, pump pouches, and SPIbelt-style wearables are popular community favorites. The compact form factor (under 2 oz) makes twiist significantly more pocketable than older-generation tubed pumps.

twiist Pump Patches and Accessories

One of the most common questions from new twiist users: can I personalize it? The short answer is yes — and Pump Peelz is here for it.

While on-body wear accessories for twiist are still expanding, Pump Peelz carries twiist pump patches — decorative accessories designed to add color, pattern, and personal expression to your twiist setup. Whether your style is bold prints, seasonal designs, or clean minimalist patterns, wearing a pump you love to look at is part of owning your diabetes management.

Emily Imblum founded Pump Peelz in 2011 because she didn't want her diabetes devices to define how she looked. Over a decade and 200,000+ customers later, that same philosophy applies to every new device that enters the space — including twiist.

Frequently Asked Questions About twiist

More Guides for the T1D Community

• Dexcom G7 Complete Guide: Everything You Need to Know in 2026
• How to Keep Your CGM On: The Complete Guide
• GLP-1 Medications, CGM & Dexcom Stelo: What You Need to Know
• Living With Diabetes: The Complete Guide (2026)
• CGM Patches for Kids: A Parent's Complete Guide to Keeping Sensors On