CarbLens AI
Meal + blood sugar journal for diabetics
See what every meal does to your blood sugar.
Have fun improving your time in range with AI meal scans, bolus grades, and friends who get it.
Works with Dexcom + FreeStyle Libre
💚 Built by a type 1 diabetic · 3-day free trial
Every meal gets a rating.
Stay in range and the meal earns a star ⭐ — your own personal menu of guaranteed Ws.
Eat. Watch. Win.
Snap it
Point at your plate. The AI reads carbs, macros, and how fast it'll hit.
Watch it land
Your CGM curve attaches to the meal for 3 hours. Then it gets graded.
Remember it
In-range wins become starred meals — proof of what works for you.
An AI that reads your patterns.
Ask CarbLens sees your meals, your doses, and your curves — and answers with the pattern, not a lecture. One insight at a time, three sentences max.
It will never tell you how many units to take. Ever. It exists so you walk into your next endo appointment with better questions.
Illustrative exchange. That last line is real — it’s required on every answer that reads your numbers.
Diabetes is less lonely with your crew.
Friends, group chats, 1-on-1 battles, and diabetics near you. Streaks, quests, and XP make the logging itself the game — because the honest truth is that the log is what teaches you.
- 💚 Meet other diabetics — in your city, or in the feed
- ⚔️ Battle friends and keep each other logging
- 🔥 Streaks and quests that reward showing up
- 📱 Live Activity grades your meal right on the lock screen
From people living it
“I was mad at my bg & then I went from 73% in range to 92.6%. great app.”
“I’m so grateful. This app has been so helpful!”
Individual experiences — not a promise of results. Glucose outcomes depend on your care plan.
Real quick — we’re not your doctor.
- 📊 CarbLens AI gives you information about your blood sugar and meals.
- 🚫 It does not recommend insulin doses, diagnose anything, or replace your CGM.
- 🩺 Use what you see here to have smarter conversations with your care team.
- 💚 You’re the boss of your diabetes. We’re just the game that makes it fun.
That’s the screen every new user sees before anything else. Here’s why it’s there.
Questions, answered
Is CarbLens AI a medical device?
No. CarbLens AI is a logging and information tool. It shows you what you ate, what you dosed, and what your glucose did afterward — it never recommends insulin doses, diagnoses anything, or replaces your CGM. Medical decisions stay between you and your care team.
Which CGMs does it work with?
Dexcom (via Dexcom Share) and FreeStyle Libre (via LibreLinkUp — the follower app, not the LibreLink scanning app). Connect once and CarbLens pulls your glucose about every 5 minutes. No CGM? You can still scan meals, log doses, chat with the AI, and compete with friends — the automatic 3-hour curve is the part that needs CGM data.
Does it tell me how much insulin to take?
No — and it never will. The AI estimates carbs from the photo, and if you've entered your own carb ratio the app can prefill the arithmetic, clearly marked as a guess you can edit. Before you ever see a prefilled number, the app makes you acknowledge a warning not to dose off the estimate alone. Dosing is a decision for you and your endocrinologist.
Is this the same app as carblens.com, carblens.app, or carblens.org?
No. Several unrelated products use the name CarbLens. This is CarbLens AI, the iPhone app by Viral Builders that pairs meal photos with your real CGM curve — it's the one that never suggests insulin doses. See our comparison of the apps named CarbLens for the differences.
How much does it cost?
CarbLens AI is free to download with a subscription inside, and the yearly plan starts with a 3-day free trial. Current pricing is always on the App Store listing.
What happens to my glucose data?
Your CGM login stays in your iPhone's Keychain — CarbLens never sees your Dexcom or Libre password. Your glucose readings and meal log are backed up to your account so a new phone doesn't mean losing your history, protected so only your account can read them. Details are in our privacy policy.
More in Support — or email viralbuildersllc@gmail.com.
Let's make diabetes fun.
Snap a meal, watch the curve, rack up wins with your crew.
Install on the App StoreiPhone · Works with Dexcom + Libre · 3-day free trial