For iPhone · Ketosis first · The best of its kind

Stay locked in ketosis.

Snap it, scan it, or just say it. Ketolock answers the only question that matters — does this keep you in, or knock you out?

Free to download · All logging free & unlimited · No account required
217keto recipes built in
31restaurant chains
$0to start, no account
Ketolock Today screen: the ketosis dial reading 5 grams of a 25 gram net-carb limit, In Ketosis, with protein, fat and calorie totals and a seven-day trend below.
In Ketosis5 g of 25 g net carbs
Macros verifiedagainst USDA
The Deceptive-Carb Radar

It reads the ingredients,
not the front of the pack.

One real barcode scan from inside the app, unedited.

Ketolock barcode result for Coca-Cola showing 11 grams of net carbs per 100 grams, a Moderation verdict, tappable macros labelled Tap to correct these numbers, a portion shown as three-eighths of a cup with a grams or ounces toggle, the serving size credited to the product label, and a radar warning that corn syrup can break ketosis.
1

Any barcode, in about a second.

Free and unlimited, with no daily cap. The scan reads the actual label rather than the marketing on the front of the pack.

2

Net carbs first, then the ingredient list.

You get the number that decides your day, and the Radar reads what is underneath it — here, corn syrup, called out plainly as something that will break ketosis.

3

Ketolock calls it.

No euphemism, no maybe — every result carries a plain verdict: keto safe, moderation, or kicks you out.

✕  Keto Safe · Moderation · Kicks You Out
4

The Radar runs on everything you log.

Maltitol, hidden starches, “sugar-free” syrups that aren’t. And it stays quiet about erythritol, allulose and stevia — warning you about your own keto sweetener would just teach you to ignore it.

✓  Free for everyone, forever
Logging that fits the moment

Three ways to log.
Pick whichever is fastest right now.

Every estimate tells you how confident it is and why. When a food matched a nutrition database, it says so. When it’s a guess, it says that too.

Ketolock entry editor showing AI confidence of 100 percent with a nutrition-database match, a correctable portion, editable fiber, and sodium, potassium and magnesium.
Snap a photo

It splits the plate, not guesses at it.

Point the camera at your food and Ketolock itemises the meal — each part verified separately, each portion correctable with a tap.

Describe a Meal chat replying with per-item net carbs, fat and protein for eggs, avocado, bacon and coffee.
Just describe it

“Two eggs, half an avocado, black coffee.”

Type it or dictate it. On iPhones with Apple Intelligence this runs entirely on your device — nothing leaves your phone, no limit, no cost.

0 12345 67890 5 Unlimited barcode scans, free —
no daily cap, no trial clock
Scan the barcode

Free and unlimited. Deliberately.

The barcode reads the real label, so it’s the most accurate route there is — and the big trackers charge for it. Ketolock never will.

A tour in seven screens

Every screenshot here is the real app.

No mockups, no renders — these are captures from Ketolock running, honest numbers included.

Today screen: the ketosis dial reading 5 grams of a 25 gram net-carb limit, with protein, fat and calories below Barcode scan with the radar verdict Entry editor showing AI confidence, a correctable portion in cups with a grams or ounces toggle, editable fiber, and electrolyte totals The recipe library grouped by meal, with net carbs and cook time on each Restaurant keto guide The fasting screen with the 16:8 protocol, fasting zones and the logging streak The daily log with the electrolytes card, showing sodium, potassium and magnesium alongside the day's net carbs
Why keto

A century of clinical use.
Not a trend diet.

Keto works on one lever: carbohydrate is the macronutrient that raises blood glucose most, so cutting it lowers both your glucose load and the insulin your body has to make. Here is who tends to feel that most.

🩸

Insulin resistance and type 2 diabetes

Fewer carbs in means less glucose to manage and less insulin demanded of a system that has stopped responding well to it. The American Diabetes Association lists low-carbohydrate eating as one recognised option for managing type 2 diabetes.

Read this first: if you take insulin or sulfonylureas, cutting carbs can drop your blood sugar fast. That is a conversation with your doctor before you start, not after.

📚

Students, and anyone who needs a steady afternoon

A high-carb lunch spikes blood glucose and then drops it — that dip is the 3pm slump. Keeping carbs low flattens the curve, and once you are fat-adapted your brain also runs partly on ketones, a fuel that does not depend on what you last ate.

Honest framing: this is about steadier energy, not a higher IQ. Nobody has shown keto makes you smarter.

🍳

Appetite that settles down

Fat and protein are more filling than refined carbohydrate, and steady blood sugar means fewer hunger spikes. Many people end up eating less without counting a single calorie.

🏥

It began as a medical treatment

The ketogenic diet was formalised at the Mayo Clinic in 1921 to treat epilepsy, and it is still used today for seizures that resist medication. Whatever else keto is, it is not new.

⚡️

The keto flu is an electrolyte problem

The headaches and fatigue of week one are usually sodium, potassium and magnesium falling as water leaves with the carbs. Ketolock tracks all three — most trackers ignore them entirely.

Ketolock is a wellness and food-tracking app, not a medical device, and none of this is medical advice. If you have a diagnosed condition or take medication, talk to your doctor before changing how you eat.

Side by side

Half the price. None of the hedging.

The things that matter on keto, and who actually gives them to you.

Ketolock Carb Manager MyFitnessPal
Yearly price$19.99$39.99$79.99
Barcode scanning freeYesPremiumPremium
AI meal scanning freeUnlimitedMeteredPremium
Net carbs as the headlineYesYesCalories first
Flags deceptive ingredientsFree for all
Shows AI confidenceEvery scan
Works with no accountYesSign-up requiredSign-up required
On-device AI optionYes

Competitor pricing and features as published on their own US App Store listings and websites, July 2026. They’re good apps with far longer track records — we’re newer, cheaper, and more honest about what a number is worth.

The best of its kind

Six things no other
keto tracker does.

“Best of its kind” is easy to say, so here is the specific version: these exist in Ketolock and, as of August 2026, in none of the major keto or calorie trackers we compared against.

01 The Deceptive-Carb Radar

Maltitol, hidden starches, “keto” bars that quietly are not — flagged on every food you log, with the reason. No other tracker warns you that a compliant-looking label will still knock you out of ketosis. It is free for everyone, because gating it would defeat the point.

02 AI that shows its working

Every scan reports its own confidence and how many items matched a nutrition database — “73% · 4 of 5 matched.” Every other AI food scanner hands you a number with no indication of whether to trust it.

03 Every way of logging, free and uncapped

Photo scanning, describe-a-meal and barcode all have no daily cap and no trial clock. The others meter their AI by the scan and put barcode behind the paywall; here the whole logging surface is free, and the subscription sells the fasting timer and recipe library instead.

04 Electrolytes, tracked properly

Sodium, potassium and magnesium, from labelled foods and one-tap adds. The keto flu is an electrolyte problem, and this is the trio nearly every other tracker ignores completely.

05 Runs without an account — or the cloud

No sign-up, ever. On iPhones with Apple Intelligence, meal chat runs entirely on the device; choose “On-device only” and your photos never leave the phone either. Competitors require an account before you can log a single egg.

06 Built for how ketosis actually works

Fasting zones, breath-ketone logging, a Glucose Ketone Index from a paired CGM, and net carbs as the headline instead of calories with a keto label bolted on.

Compared against the current US App Store listings and public feature pages of Carb Manager, MyFitnessPal, Cronometer, Senza and Cal AI, August 2026. If one of them ships any of the above, tell us and this section changes.

Eat out

31 chains. Real numbers.

A searchable guide built into the app, with keto-viable orders and the macros that come with them — not a blog post you have to go hunting for.

Simple pricing

Under $20.
For the whole year.

$19.99 a year works out to $1.67 a month, or pay $3.99 monthly if you’d rather not commit. One subscription, priced honestly. Cancel any time in your iPhone’s settings and keep the free tier forever.

Free
$0
forever
  • Unlimited barcode scanning
  • Unlimited AI photo scanning — no daily cap
  • Unlimited “describe a meal” chat
  • Deceptive-Carb Radar on everything
  • Net carbs, macros, electrolytes, water, steps, weight
  • Bio-Sync: glucose, GKI & meter logging
  • 3 recipes + 5 restaurant guides
  • No account required
7 days free
Ketolock Pro
$19.99/year
≈ $0.38 a week · or $3.99 monthly
  • Everything in Free
  • The intermittent-fasting timer & ketosis zones
  • All 217 recipes + meal plans & grocery lists
  • All 31 restaurant chains
Billed through the App Store. Try Pro free for 7 days — cancel before it ends and pay nothing.
Private by design

Your food diary is nobody’s business.

Ketolock’s App Store privacy label reads “Data Not Linked to You” — because there’s no account to link anything to.

No accountNo adsNo analytics SDKsNo data brokersOn-device AI optionHealth data stays on your phone
Good things to know

Questions, answered straight.

What exactly are net carbs?
Total carbohydrates minus fibre and sugar alcohols — the portion that meaningfully affects blood glucose for most people. It’s the number keto runs on, so it’s the number Ketolock puts first.
How accurate is the AI?
Honest answer: it depends on the food, and Ketolock tells you instead of hiding it. Barcodes read the real label. Photo and text scans are estimates verified against the USDA database wherever possible — and every result shows its confidence and how many items matched, so you decide how much to trust it. Portions are always one tap to correct.
Do I need an account?
No. There’s nothing to sign up for. The app is fully usable the moment it opens, and your log lives on your phone.
Does it work with Apple Health, CGMs and ketone meters?
Yes. Apple Health can share steps, active energy and glucose (from a paired CGM). Blood-ketone readings from any meter power your Glucose Ketone Index, and breath-acetone readings from any breath device are tracked as their own honest trend — never fake-converted between units.
Is there an Android version?
Not yet — Ketolock is built natively for iPhone first, including its on-device Apple Intelligence features.
Is Ketolock a medical device?
No. Ketolock is a wellness and food-tracking app. It doesn’t diagnose, treat or prevent any condition, and it’s not a substitute for a clinician. Talk to a doctor before making decisions about your health.

Your first day in ketosis starts with one photo.

Free on the App Store. No account, no ads — your first scan is thirty seconds away.