Short answer
Pick Cal AI if you want fast photo-based logging and a clean, AI-first experience. Pick MyFitnessPal if you want the biggest food database, barcode scanning on anything, and years of existing data worth preserving. MFP acquired Cal AI in March 2026, so expect the two to converge over the next 12-18 months.
Cal AI at a glance
Cal AI launched in 2024 as an AI-native calorie tracker. Snap a photo, the app estimates calories, macros, and portion size using computer vision. Strengths: 30-second meal logs, polished modern UI, photo recognition good enough for common meals. Weaknesses: smaller food database than MFP, less accurate on complex homemade dishes, newer and less mature as a product. Pricing: roughly $70/year premium. Ratings: 4.7 stars on App Store with over 1 million downloads.
MyFitnessPal at a glance
MyFitnessPal launched in 2005 and is the incumbent calorie tracker. 20-million-item food database, barcode scanner that recognizes nearly every packaged food, macro tracking, exercise logging, integration with most fitness trackers. Strengths: unmatched database depth, mature data export, strong community features. Weaknesses: free tier feels increasingly restricted, ads in free experience, innovation velocity slowed after Under Armour (2015) and Francisco Partners (2020) acquisitions. Pricing: free tier exists but aggressively upsells; premium is $19.99/month or $79.99/year.
Pick Cal AI if
- You want the fastest possible meal log
- You do not have years of MFP data to preserve
- Your meals are mostly common dishes, not unusual homemade items
- You prefer a clean UI over feature depth
- You will accept 15-20 percent error for a 30-second log
Pick MyFitnessPal if
- You already use MFP and your historical data matters
- You track with macro precision (bodybuilding, medical diet)
- You buy a lot of packaged foods and scan barcodes often
- You want the most accurate database entries per food
- You do not mind a heavier UI or occasional upsell prompts
Where they overlap
Both now sit in the same corporate family post-March 2026. Both support iOS and Android. Both integrate with Apple Health and Google Fit. Both offer barcode scanning (Cal AI's is less comprehensive). Both have annual subscription pricing in the $70-80 range for paid tiers. The Cal AI technology is being integrated into MFP over the next 12-18 months, which will likely blur the distinctions further.
Where they genuinely differ
Cal AI's primary differentiator is the photo-to-log pipeline. You skip the search step entirely. MFP's primary differentiator is the database and barcode scanner. These are different logging philosophies. Cal AI assumes the photo is faster than search. MFP assumes the user knows what they ate and just needs to find the entry. For a typical day of eating, Cal AI logs faster. For tracking a specific packaged food or a chain-restaurant item with a known entry, MFP logs more accurately.
For a different approach entirely, where the question is not "how many calories" but "how did that meal make me feel 2 hours later," see Aloe AI vs Cal AI. The food-to-feeling approach is a different kind of tracking that neither Cal AI nor MFP attempts.
The acquisition effect
The March 2026 acquisition is the most important variable in this comparison. Cal AI continues to operate as a standalone product in the short term. Historically, MFP's previous acquirers (Under Armour, Francisco Partners) slowed innovation and added ads and paywalls to the free tier over 1-2 years. Whether that pattern repeats is the open question. If you are choosing between the two products today, assume Cal AI's lean feel has a 12-18 month window before it likely shifts toward the broader MFP experience. If that matters, it is a reason to consider an independent alternative.
Bottom line
Cal AI and MyFitnessPal now live under the same roof. The product-level difference is speed versus depth. Cal AI is faster to log, MFP has more data. Neither is "better." The right pick depends on which friction annoys you more: searching a huge database (MFP pain point), or manually correcting an AI-estimated photo (Cal AI pain point). Try both for a week if you are genuinely unsure. Most users pick one and stick with it within 2-3 days.