Free Glycemic Index Apps: What Is Actually Free in 2026

Every app in this category is listed as “Free” in the App Store. Almost none of them are. The word describes the download, not the product.

This page is not a ranking of quality. It answers one question that the store listings deliberately do not: what do you actually get without paying, and where exactly does the wall fall? We checked eleven apps on 13 September 2026 — free tiers, trial lengths, scan limits and annual prices. We build one of them (LOGI), so we also say exactly where our own paywall drops, which is after ten scans, and name the apps that are cheaper or more generous than ours.

Short version. For a glycemic index lookup table you never pay for, Glycemic Index Load Net Carbs wins: the whole GI list is free and the annual upgrade is $12.99, the cheapest price anywhere on this page. For free photo scanning of real meals, Glycemic Snap is the only app that gives you three scans a day, forever. For the deepest free food diary — with no GI framing at all — Cronometer. For free blood sugar logging when you already own a meter, mySugr, in 32 languages. LOGI gives ten free scans and then charges; on the specific question “what is free”, Glycemic Snap beats us, and that should be said plainly.

”Free” means four different things

Almost every disappointment in this category comes from confusing four business models that share one word:

1. Free forever, with a daily cap. You can use it every day indefinitely, but a counter stops you. Glycemic Snap works this way: three meal scans per day, no end date.
2. Free forever, with features removed. The core is usable, the good parts cost money. Cronometer, Carb Manager and MyFitnessPal work this way.
3. Free for a trial. Seven days, then a charge. LOGI and MyFitnessPal Premium work this way.
4. Free to download only. Installs for nothing, unusable after two screens. This is the most common result in an App Store search for “glycemic index app free”.

An honest app tells you which of the four applies before you install. Most do not.

What is actually free, app by app

Glycemic Index Load Net Carbs — the free table, and by far the cheapest upgrade

App Store id 1087424868, version 4.3.16, updated 18 August 2026, rated 4.52 from 3,497 ratings, 17 languages.

Free: the complete glycemic index list plus a weight tracker with charts and stats. That is precisely what someone typing “is there a free glycemic index app” is looking for — a table you can look things up in.

Not free: the food diary, the meal calculator and the advanced analytics. Reviewers report that roughly 80% of the functionality is behind the paywall, so treat the free tier as a lookup table with a weight chart attached.

Price: in-app purchases at $1.99/week, $3.99/month, $9.99 for six months, $12.99/year, a $19.99 one-time purchase, and a separate “Glycemic Premium” at $59.99. Remove Ads costs $0.99.

What is not good: the interface is dated, there is no photo input, no prediction and no planner. Seven different price lines on one store listing is confusing in itself.

Glycemic Snap — the only genuinely free daily photo scanning

Verified on the vendor’s own site, 13 September 2026. App Store id 1522964184, version 5.9.0, updated 7 September 2026, rated 4.48 from 214 ratings, 14 languages.

Free: three meal scans per day, the full diary, daily glycemic-load budget tracking and weight tracking. No end date. This is the most generous free tier here for anyone who wants to photograph plates.

Not free: unlimited scans, glucose logging, Apple Health sync and the web app. Pro is $39.99/year or $9.99/month on the US App Store.

What is not good: Apple Health and CGM integration is iPhone-only — Android Health Connect is not supported. There is no meal planner. The vendor states that “two out of three people who use Glycemic Snap have no meter”; that is their own number and cannot be checked from outside, but it describes the audience accurately.

One correction we owe readers: our own April comparison described Glycemic Snap as English-only at $4.99/month and $59.88/year. That is no longer true. It now ships in 14 languages and its annual price has dropped to $39.99 — exactly the same as ours.

Cronometer — the best free diary, with no glycemic index in it

App Store id 1145935738, version 4.58.3, updated 4 September 2026, rated 4.77 from 97,893 ratings. Store listing in English only.

Free: food, exercise and biometric logging, up to 84 nutrients, custom macro and micronutrient targets, barcode scanner, device sync, a database of over a million foods, and seven-day reports. This is the richest free tier on the page by a distance.

Not free: Gold at $10.99/month, or $4.99/month billed annually — $59.99/year. Gold adds photo and voice logging, an AI coach, a recipe importer, a macro scheduler, a fasting timer, custom charts, unlimited history and no ads.

What is not good for this search: Cronometer does not talk about glycemic index or glycemic load anywhere. If your question is “will this plate spike me”, it answers with grams, not with an answer.

Carb Manager — a wide free tier pointed at keto

App Store id 410089731, version 12.6.7, updated 28 May 2026, rated 4.82 from 734,747 ratings — an order of magnitude more feedback than anything else here. Store listing in English only.

Free: food logging, exercise logging, weight tracking, 360,000+ recipes and an introductory course.

Not free: premium recipes, curated meal plans, the smart meal planner, shopping lists, advanced reports, voice and natural-language logging, and Fitbit/Garmin sync. Price on carbmanager.com: $3.33/month billed annually, about $39.99/year, presented as 39% cheaper than the quarterly plan.

What is not good: the framing is keto, not glycemic. Glycemic load exists as data on food items; it is not the lens the app thinks in. And the English-only listing matters if you are not reading this in English.

MyFitnessPal — free, but not where you need it

App Store id 341232718, version 26.36.0, updated 8 September 2026, rated 4.71 from 2,356,655 ratings, 19 languages.

Free: calorie tracking and a basic macro split.

Not free — and this is the part that stings: free users cannot set their own gram targets for carbs, protein and fat. Custom macros, the barcode scanner and an ad-free experience all sit in the paid tiers. Premium is $79.99/year ($6.67/month effective). Premium+ is $99.99/year, or $24.99/month billed monthly, and Premium+ is the tier that includes meal planning. There is a 7-day free trial for anyone who has not used one before.

What is not good: no glycemic index or glycemic load feature at all.

mySugr — free and in 32 languages, if you already own a meter

App Store id 516509211, version 3.146.0, updated 6 September 2026, rated 4.68 from 32,857 ratings, 32 languages — the widest coverage in this comparison. Published by mySugr GmbH, part of Roche.

Free: the core app. Fingerstick logging, carbs, insulin doses, and syncing with several glucose meters. PRO is $4.99/month or $39.99/year.

What is not good for this search: mySugr does not compute glycemic load on a mixed plate and does not predict anything. If you have a meter and a diabetes diagnosis, mySugr is a better app than any prediction app on this page — it is simply not a glycemic index app.

Fooducate — where the keyword and the product do not match

App Store id 398436747, version 7.28, last updated 18 February 2026, rated 4.65 from 77,539 ratings, 6 languages. Published by Maple Media Apps, an app-portfolio company.

The fact that matters: Fooducate’s App Store description does not mention glycemic index once. It describes barcode scanning, food logging, macro tracking and an “eat to beat diabetes” personalisation option. In-app purchases run from $1.99 to $89.99 across several plan names, with no single published price. Whatever the listicles say, this is not a glycemic index app.

LOGI — our app, and exactly where free ends

Free: ten scans, then a soft paywall. A 7-day free trial is available inside the app.

Not free: everything after that, and the meal planner sits behind a hard paywall — of all the features people do not expect to be locked, the planner is the one. Pricing is $2.99/week or $39.99/year, about $3.33/month.

What is not good: ten scans is about three days of normal use. Glycemic Snap is more generous on exactly this point, with three scans every day and no end date. Paid weekly, LOGI works out at roughly $12.99/month, which is expensive; only the annual price is competitive. The AI misreads cluttered plates, and typing a correction is often faster than re-shooting the photo. And the predicted 3-hour curve is shown without a confidence interval, which means the prediction is presented as more certain than it is.

What is good, for completeness: a photo returns a glycemic load, a macro breakdown, a predicted 3-hour curve and specific swaps; the planner builds 1–14 days for 1–6 people; there is HOMA-IR tracking and a PDF export designed to hand to a doctor; the ingredient database holds 7,158 items; and the app and site exist in six languages.

Table: what you get without paying

App	Free forever?	What you get for nothing	Annual price	Languages
Glycemic Index Load Net Carbs	Yes	Full GI table + weight tracking	$12.99	17
Glycemic Snap	Yes	3 photo scans per day, diary, GL budget	$39.99	14
Cronometer	Yes	Full diary, 84 nutrients, barcodes	$59.99	EN listing
Carb Manager	Yes	Diary, weight, 360k recipes	≈ $39.99	EN listing
MyFitnessPal	Yes	Calories + basic macros, targets locked	$79.99	19
mySugr	Yes	Full glucose and insulin log	$39.99	32
Fooducate	Yes	Barcode scanning, A–D grades	No single published price	6
LOGI	No	10 scans, then a 7-day trial	$39.99	6

Prices from the US App Store and vendor sites on 13 September 2026; local pricing and promotions vary.

Which free app for which reader

“I only want to look up the GI of a food, without a subscription.” Glycemic Index Load Net Carbs. Free for the table, $12.99 a year if you want the diary. Nothing else comes close on price.

“I want to photograph meals for free, every day.” Glycemic Snap, for the three daily scans that never expire. Do not install LOGI if free is your criterion — ten scans in total is less.

“I want the glycemic load of a whole plate, not the GI of one ingredient.” Here you have to pay. LOGI or Glycemic Snap, both $39.99/year. Take LOGI if you want a meal planner or a PDF for your doctor; take Glycemic Snap if you want to test it for a long time before paying anything.

“I have a glucometer and a diagnosis.” mySugr, free. A predicted curve is not a substitute for a real reading.

“I want the most complete free food diary.” Cronometer, accepting that it will never mention glycemic load.

“I am doing keto.” Carb Manager.

Three things nobody in this category does well, us included

Free tiers are unreadable before you install. No store listing says “three scans a day” or “ten scans total”. You have to install to find out. That is a category-wide failure and LOGI is part of it.

Published annual prices move week to week. Yazio, SNAQ and Fooducate each show five to seven different price lines on their App Store listing depending on the campaign running. Any price comparison, including this one, is a dated snapshot.

Prediction never shows its uncertainty. A smooth three-hour curve implies a precision nobody has. The honest output would be “likely peak between these two values, in about forty-five minutes”. LOGI does not show that either.

The two-minute test

Install whichever free app matches your case above. Photograph or type the meal you were about to eat. Read what it tells you. Take the swap it suggests. Do that for a week: if one food decision per day changes, the app has earned something; if nothing changes, delete it before the trial ends — that is useful information too.

Download LOGI on the App Store — Get LOGI on Google Play — Read more on logifoodcoach.com