Privacy-first nutrition scanner · iPhone
Nutrition, made clear. And kept to yourself.
Scan a barcode or photograph a label. Theli reads it in a beat — calories, macros, the whole panel — and logs it. Your diary stays on your phone and syncs to Apple Health if you choose — never to us. No account, no subscription, no tracking.
theli · THEH-lee · Tamil (தெளி) for clarity
Coming soon to the App Store · iPhone only
Scan. Confirm. Log. That's the whole app.
Two ways in, one calm review screen, and it's in your day. No menus to wrangle, no profile to build first.
Point at the barcode
Theli looks it up in Open Food Facts, with a USDA fallback for US products that aren't there yet. Facts appear, scaled to your serving.
Or photograph the label
No barcode? Fresh, local, or imported food? Snap the Nutrition Facts panel. Apple's on-device Vision reads it — the photo never leaves your phone and is discarded after parsing.
Check it, then log it
One review screen. Adjust the serving and every number recomputes instantly. Tap to log. It lands in today's diary, grouped by meal, totaled against your targets.
It keeps the longer view, too.
Theli isn't only a daily log. Watch your weight settle into a trend over days and weeks, and let the built-in goal calculator set sensible calorie and macro targets from your own numbers — all on your phone, none of it synced to us.
- Weight trend — log your weight and a smoothed line reads the direction through the daily noise.
- Goal calculator — Mifflin–St Jeor targets from your sex, age, height, weight, and activity.
Most nutrition apps are data businesses. Theli isn't.
Free. The whole thing.
Every feature is open — scanning, label OCR, your daily log, targets, and history. Theli is built as a labour of care, not a funnel: no premium tier, no locked features, nothing held back. The only thing money ever touches is an optional tip jar.
paywall
Fair questions to ask a nutrition app.
Is my data really never uploaded?
Correct. There's no Theli account and no Theli server. Your diary lives in on-device storage; label photos are read on your phone and discarded after parsing. The only thing that ever leaves is a barcode number — sent to Open Food Facts or USDA purely to look up a product.
Do I need an account or a subscription?
No — and you never will. Theli has no account, no subscription, and no server. Your log lives on your phone; turn on Apple Health and your entries are written there too — guarded by Apple, never sent to us. There's nothing to sign up for because there's nowhere else for your data to go.
What if a food isn't in the database?
Photograph the Nutrition Facts label and Theli reads it on-device — no barcode needed. Or add it by hand in a few taps. Either way it's logged just like a scan.
Does it work offline?
Barcode lookups need a connection, since they query Open Food Facts and USDA. Label scanning, manual entry, and your whole diary work fully offline — the OCR runs on your phone.
How accurate are the numbers?
Barcode data comes from Open Food Facts, which is crowdsourced and occasionally wrong, so every value is editable on the review screen before you log it. Always verify against the actual label — Theli is a logging tool, not medical advice.
iPad or Android?
Theli is built for iPhone. There's no iPad-optimized layout or Android version planned — the focus is doing one thing well on the phone in your pocket.
What does the tip jar unlock?
Nothing — that's the point. Every feature is free for everyone. The tip jar is a small, optional thank-you toward the Apple Developer fee; it changes nothing about the app.