Abbott's current CGM lineup — 15-day wear, AID system compatibility, and a single universal app that changed the scan-vs-stream story. Here's what's actually different between the two and how to choose.
Device specifications change frequently — always verify current information directly with the manufacturer before making any decisions. Full disclaimer.
New to Libre? Start here.
The old Libre 2 and Libre 3 were discontinued September 30, 2025. They are no longer being manufactured. The current lineup is the Libre 2 Plus and Libre 3 Plus. If you or your patients are on the old sensors, a new prescription is required to transition. Coverage for the Plus versions is the same as their predecessors.
FreeStyle Libre is available through US Med, the "#1 distributor for FreeStyle Libre systems nationwide" — and a longtime Juicebox Podcast sponsor. usmed.com/juicebox · 888-721-1514 · Free benefits check · 90-day supply · fast & free shipping
With the new universal Libre app (April 2025), Libre 2 Plus users receive real-time glucose readings pushed automatically to their phone — no scanning needed for current data. Scanning is now mainly used to recover any data gaps from signal loss. This largely dissolves the old scan-vs-stream distinction.
High and low glucose alarms work continuously in the background — no scanning required to receive them. Alarms can be silenced for a customizable window up to 6 hours in the new app. Urgent Low (below 55 mg/dL) alarm is always active.
Compatible with Omnipod 5 and twiist AID systems. Not compatible with iLet, t:slim X2, or Tandem Mobi. If your patient's AID system isn't on this list, they need Libre 3 Plus.
A dedicated reader device is available as an alternative to the smartphone app — useful for younger children, patients without compatible phones, or those who prefer a separate device.
About the size of two stacked pennies — 21mm × 2.9mm. Worn on the back of the upper arm. The smaller size and lower profile reduce the footprint and can improve comfort, especially for children and those who want maximum discretion.
Sends a glucose reading to your phone every minute automatically — no scanning required at any point. 33-foot Bluetooth range (vs ~20 feet for Libre 2 Plus). Readings appear on your phone as they happen.
Compatible with iLet Bionic Pancreas, twiist, Tandem t:slim X2, and Omnipod 5. If your patient is on or planning an AID system, Libre 3 Plus is the more future-proof choice. Does not work with Tandem Mobi.
FDA-approved for ages 2 and older — lower than Libre 2 Plus (ages 4+). For pediatric patients under age 4, Libre 3 Plus is the only current Libre option.
Both Plus sensors last 15 days — up from 14 days on the old Libre 2 and 3. Two sensors per month instead of two-plus. Applied to the back of the upper arm only.
One hour after applying a new sensor before readings begin — same for both versions. Plan sensor changes around this window.
Both sensors are water resistant to 3.2 feet for up to 30 minutes. Swimming, showers, and rain are fine within this range. Not rated for extended submersion or hot tubs.
One app works for both sensors (and old Libre 2/3). LibreView shares data with clinicians. LibreLinkUp lets up to 20 followers see glucose data in near real-time. Note: LibreLinkUp and AID system use cannot run simultaneously.
Patient uses Omnipod 5 or twiist. Patient is age 4+. Patient prefers or needs a reader device. Cost or formulary coverage is the primary driver. AID needs are limited to these systems.
Patient is on or planning iLet, t:slim X2, or multiple AID options. Patient is under age 4. Patient wants the smallest possible sensor. Patient wants the broadest future compatibility.
Patients on old Libre 2 or Libre 3 (discontinued September 2025) need a new prescription for the Plus versions. Coverage mirrors the outgoing sensors — same Medicare and commercial coverage pathways apply.
Critical for pediatric use: FreeStyle Libre sensors can connect to EITHER the AID system OR LibreLinkUp — not both simultaneously. For parents who need real-time remote follow while a child is on AID, this is a Dexcom advantage.
The Libre's AID story is genuinely good news — and expanding fast. The caregiver follow limitation is the detail that clinicians most often miss. And the new universal app changed the user experience more than any hardware update.
AID Compatibility — Which Sensor Works with Which System| AID System | Libre 2 Plus | Libre 3 Plus |
|---|---|---|
| Omnipod 5 | ✓ | ✓ |
| twiist (Sequel Med Tech) | ✓ | ✓ |
| iLet Bionic Pancreas | ✗ | ✓ |
| Tandem t:slim X2 | ✗ | ✓ |
| Tandem Mobi | ✗ | ✗ |
| MiniMed 780G | ✗ (Instinct sensor) | ✗ (Instinct sensor) |
| DIY Loop / Trio / AndroidAPS | Limited / bridge only | Limited / bridge only |
The caregiver follow limitation is real and commonly missed. FreeStyle Libre sensors can only connect to one system at a time — either the AID pump or LibreLinkUp (caregiver follow app). You cannot have both simultaneously. For pediatric patients where parents need real-time remote glucose visibility AND the child is on AID, this is a meaningful prescribing consideration. Dexcom G7 allows Share/Follow while the AID system is also running.
| Feature | Libre 2 Plus | Libre 3 Plus |
|---|---|---|
| Wear time | 15 days | 15 days |
| MARD (adults) | ~8.1% | ~8.2% |
| MARD (ages 6–17) | — | ~8.2% |
| MARD (ages 2–5) | — | ~9.7% |
| Data transmission | Auto-stream + scan for gaps | Auto-stream every minute |
| Bluetooth range | ~20 feet | 33 feet |
| Sensor size | Compact | World's smallest (2 stacked pennies) |
| Minimum age | 4 years | 2 years |
| Warmup | 60 minutes | 60 minutes |
| Water resistance | 3.2 ft, 30 min | 3.2 ft, 30 min |
| AID compatibility | Omnipod 5, twiist | Omnipod 5, twiist, iLet, t:slim X2 |
| Optional reader | Yes | Yes |
| App | Universal Libre app | Universal Libre app |
Libre 2 → Libre 2 Plus and Libre 3 → Libre 3 Plus each require a new prescription. Coverage and copay tiers mirror the outgoing sensors. Some plans may require prior authorization for the Plus versions — confirm with patient's insurer before submitting.
Patients transitioning from old Libre to Plus versions while on AID systems will need to re-pair their sensor with their pump. Confirm the pump's software supports the Plus sensor version (some pumps required software updates for the newer sensors).
Before prescribing Libre for any pediatric AID patient, explicitly discuss the LibreLinkUp + AID limitation. If parents require simultaneous caregiver follow during AID use, they need Dexcom. If they only need AID (no simultaneous follow), either Libre works.
Clinic data flows through LibreView (web-based). If your institution uses Epic, Libre data may now be available directly in the patient's chart via the Epic integration announced April 2025. Confirm availability with your Epic administrator.
FreeStyle Libre is the most widely used CGM system globally, with over 7 million users worldwide. The clinical evidence for its effectiveness in improving glycemic outcomes is extensive — and the Plus versions represent meaningful improvements over their predecessors.
Accuracy in ContextA MARD of 8.2% means that at a true blood glucose of 100 mg/dL, you can expect the sensor to read approximately 91.8–108.2 mg/dL on average. Both Plus sensors are within the clinically accepted range for making treatment decisions without confirmatory fingersticks.
For ages 2–5, Libre 3 Plus has a MARD of 9.7% — higher than its adult figure. For ages 6–17, MARD is 8.2%. For comparison, Dexcom G7 achieves 8.1% for ages 6–17 and 7.7% for ages 2–6. The pediatric accuracy gap is a real prescribing consideration for young children.
All CGMs measure interstitial fluid glucose, not blood glucose. There's an inherent 5–15 minute lag between changes in blood glucose and the corresponding CGM reading. This is particularly relevant when glucose is changing rapidly — during exercise, meals, or hypoglycemia recovery.
Both Plus sensors are factory-calibrated and do not require fingerstick calibration during normal use. Fingersticks may be needed if sensor readings don't match symptoms, or when making dosing decisions during the 60-minute warmup period.
Libre 2 Plus: MARD ~8.1%. Libre 3 Plus: MARD ~8.2%. Both within clinically acceptable range for treatment decisions. No fingerstick calibration required. Factory-calibrated.
Ages 6–17: Libre 3 Plus MARD 8.2%. Ages 2–5: Libre 3 Plus MARD 9.7%. For very young children, Dexcom G7 may offer better accuracy. Libre 2 Plus not approved under age 4.
Omnipod 5: either sensor. twiist: either sensor. iLet or t:slim X2: Libre 3 Plus only. Tandem Mobi: neither sensor (Dexcom only). MiniMed 780G: Instinct sensor only.
LibreLinkUp: up to 20 followers, near real-time. Cannot run simultaneously with AID pump. For pediatric AID patients requiring simultaneous parental follow, Dexcom is required. Explicitly counsel families before prescribing.
LibreView: clinic reports (similar to Dexcom Clarity). Epic EHR integration available (April 2025). LibreLinkUp for caregiver sharing. Universal Libre app for patients — works for all current and recent Libre sensors.
Widely covered: Medicare, Medicaid, most commercial plans. US Med is the #1 Libre distributor nationwide and a Juicebox Podcast partner (usmed.com/juicebox). Pharmacy and DME channels both available.