Carb Manager is the keto app: free net carbs, keto recipes, Premium meal plans and ketone tracking. Cronometer, MyNetDiary Premium and Eat This Much can also do low carb. Carby does not track ketones or net carbs.
| App | Starter price | If you stay a year | Trial | Refunds |
|---|---|---|---|---|
| Carb Manager | Free Basic at $0.00. Premium listed at $3.33 a month billed annually on the Premium page. | Premium listed at $3.33 a month billed annually. $0 on Basic. Grocery is extra. | Basic is free with no trial. Premium checkout is in the app; the public Premium page does not name a trial length. | App Store listing: payment is charged at purchase confirmation and the subscription auto-renews unless auto-renew is turned off. Follow Apple or Google Play to cancel. |
| Cronometer | Free Basic. Gold $4.99 a month billed annually at $59.99, or $10.99 a month billed monthly, on cronometer.com/gold. | $59.99 on Gold yearly. $131.88 if you stay on Gold monthly at $10.99. $0 on Basic. Grocery is extra. | Basic is free with no time limit. Gold checkout is on the Gold page and in the apps. | Web Gold: set Do Not Auto-Renew in Account Settings and access continues to the end of the term. App Store or Google Play Gold follows those stores. |
| MyNetDiary | Free. Premium $8.99 a month or $59.99 a year. Premium Plus $14.99 a month or $99.99 a year, on MyNetDiary’s about and AI scanner pages. | $0 on Free. $59.99 on Premium yearly. $99.99 on Premium Plus yearly. A $179.99 lifetime option is listed on the free-tracker page. | Free tier needs no trial. Premium trial on iOS is documented in MyNetDiary’s FAQ index; length is shown in the store checkout. | Premium can be bought on MyNetDiary.com (Paddle) or as an in-app purchase. App Store and Google Play refunds follow those stores. |
| Eat This Much | Free forever plan at $0.00/month. Premium listed at $5.00/month on the pricing page. | Help center (updated May 5, 2026) lists Premium at $59.99/year or $14.99 month-to-month. The pricing page shows $5.00/month. Read the checkout you see. | Free forever plan needs no trial. Help center says Premium includes a 14-day free trial. | Help center: no-questions-asked 30-day refund if you email support. Cancel during the Premium trial to avoid the first charge. Website, iOS and Google Play each have their own cancel path. |
| Carby | $39.99/year after a 3-day trial on web yearly checkout | $39.99 if you stay on the web yearly plan after the 3-day trial | 3-day trial on the web yearly offer visitors actually see. Monthly ($9.99) and weekly ($4.99) plans also exist. Read the checkout. | Web Stripe charges: email within 30 days of the charge for a refund. App Store charges go through Apple. Cancel during the trial and you are not charged. |
Grocery purchases are extra. Tracker prices are from public vendor pages and US iTunes Lookup, checked October 20, 2026. Carby is a dinner planner, not a food diary.
Homepage: #1 low-carb and keto diet app. Free net carbs. Premium $3.33 a month billed annually.
Carb Manager is for Counting net carbs, including keto and a listed diabetes carb counter on Premium. Skip it if you need family dinners under a typed grocery budget and you are not counting carbs.
People use it for keto because the diary is detailed. It is not a keto social app.
Cronometer is for A verified food diary when you care about vitamins and minerals, not only calories. Skip it if you want the app to pick this week’s family dinners under a store budget.
About page lists Keto and Low-Carb among Premium diet plans.
MyNetDiary is for A free, ad-free calorie diary with a staff-verified database and a free barcode scanner. Skip it if you want the app to generate five family dinners under a grocery cap at Walmart or Aldi.
The generator is built for calories, macros, keto and carb cycling, per Carby’s Eat This Much comparison. Grocery list on Premium.
Eat This Much is for Someone whose plan has to hit calorie or macro numbers, with a grocery list as a follow-on. Skip it if dinner for a family at a named grocery store is the job, and macros are not.
Diet filters exist. Net carbs, ketones and GKI do not. Do not pick Carby as a keto tracker.
Carby is for A household that shops a named US store and wants the week of dinners to start from a spending limit. Skip it if you need the planner to drop ingredients into a retailer pickup or delivery cart.
Carb Manager, for counting and keto recipes. Eat This Much if you want meals generated to a keto target. Carby is not a keto tracker.
Carby can filter dinners. It does not track net carbs or ketones. Carb Manager’s Premium recipe database is the keto-first catalog.
Carb Manager Premium generates shopping lists from keto meal plans. Carby generates an aisle list from budget dinners, which may or may not be keto, and it still will not count net carbs.
Sources checked October 20, 2026: Carb Manager homepage · Carb Manager Premium · App Store listing · iTunes Lookup id 410089731 · Cronometer homepage · Cronometer Gold · Cronometer subscription types · App Store listing · iTunes Lookup id 1145935738 · MyNetDiary homepage · MyNetDiary about · MyNetDiary free tracker page · App Store listing · iTunes Lookup id 287529757 · Eat This Much pricing · Eat This Much homepage · Eat This Much help: what you get · Eat This Much help: cancel any time · App Store listing · iTunes Lookup id 981637806 · App Store listing · iTunes Lookup id 6779585429 · Carby billing policy · Carby refund help. Competitor facts come from those public pages and US iTunes Lookup. Missing cells were omitted, not guessed.