Research shows that nutrition apps most commonly use push notifications (49% of apps), behavior-change psychology (41%), personalization features (32%), and goal-setting tools (31%) to keep people engaged, according to a Gram Research analysis of 59 studies. However, only 31% of studies clearly define what engagement means, and most measure it only by tracking how often people open the app, making it unclear which strategies actually work best for long-term motivation.
According to Gram Research analysis, a comprehensive review of 59 nutrition app studies found that most apps use similar tricks to keep people engaged—like push notifications and goal-setting features—but there’s no standard way to measure if these tricks actually work. Researchers discovered that apps designed for weight loss often use four main engagement strategies: reminders (49% of apps), behavior-change psychology (41%), personalized features (32%), and goal-setting tools (31%). However, most studies don’t clearly define what “engagement” even means, and few track whether people stay engaged long-term. This matters because nutrition apps only work if people keep using them, but right now, the science behind what keeps people motivated is messy and inconsistent.
Key Statistics
A 2024 scoping review of 59 nutrition app studies found that push notifications were the most common engagement strategy, used in 49% of apps, followed by behavior-change psychology integration in 41% of apps.
According to research reviewed by Gram, only 31% of the 59 nutrition app studies provided an explicit definition of user engagement, despite engagement being essential for app effectiveness.
A comprehensive analysis of 59 nutrition app studies found that 64% measured engagement by tracking how often users accessed specific app functions, while only 29% tracked long-term retention rates.
Research shows that apps developed for scientific studies more frequently incorporated behavior-change psychology theories (41% of studies) compared to commercial apps, which prioritized simplified user experience.
The Quick Take
- What they studied: How nutrition apps try to keep people engaged and what methods researchers use to measure if people actually stay interested in using them
- Who participated: Analysis of 59 published studies about nutrition apps for adults, mostly focused on people who are overweight or obese, conducted mainly in North America and Europe between 2013 and 2024
- Key finding: Push notifications and goal-setting features are the most common engagement tools (used in about half of apps), but only 31% of studies clearly define what engagement means, making it hard to know which strategies actually work best
- What it means for you: If you use a nutrition app, you’ll likely see reminders and goal-tracking features because they’re popular—but scientists aren’t sure yet which combination works best for keeping people motivated long-term. Choose apps that feel right for you personally rather than assuming all apps use equally effective strategies.
The Research Details
Researchers conducted a scoping review, which is like creating a comprehensive map of a topic. They searched four major scientific databases (PubMed, Scopus, Cochrane, and Web of Science) for all studies published between January 2013 and June 2024 that tested nutrition apps with real people. They included 59 studies total—mostly randomized controlled trials (the gold standard for research) and observational studies where researchers watched what happened without controlling everything.
Two independent reviewers carefully read through each study to decide if it should be included, and a third reviewer settled any disagreements. They then organized all the information about what engagement strategies each app used (like notifications or personalization) and how researchers measured whether people stayed engaged (like counting how often people opened the app or how many people kept using it after a few weeks).
This approach is valuable because it gives a bird’s-eye view of what’s actually happening in real-world nutrition app research, rather than focusing on just one study. It helps identify patterns, gaps, and inconsistencies across the entire field.
Understanding engagement strategies matters because nutrition apps only work if people actually use them regularly. Many apps are abandoned after a few weeks, which wastes development resources and prevents people from getting health benefits. By mapping what strategies are most common and how they’re measured, researchers can identify which approaches are most promising and which need more testing. This scoping review approach is important because it synthesizes information across many studies to show the bigger picture of what’s working and what isn’t.
This is a scoping review, which is a reliable way to map a research field but doesn’t rank studies by quality or combine their results statistically like a meta-analysis does. The strength of this review comes from including 59 different studies and having two independent reviewers check the work. However, the quality of the findings depends on the quality of the original 59 studies—some were rigorous randomized trials while others were less controlled. The main limitation is that this review identifies what strategies exist but doesn’t definitively prove which ones work best because the original studies measured engagement so differently.
What the Results Show
The review identified four engagement strategies that appear most frequently in nutrition apps: push notifications (used in 49% of the 59 studies), integration of behavior-change psychology theories (41%), personalization and customization features (32%), and goal-setting tools (31%). These strategies represent what app developers and researchers believe will keep people motivated to use nutrition apps regularly.
However, a critical finding emerged: only 31% of the 59 studies actually provided a clear definition of what “user engagement” means. This is a major problem because different researchers measure engagement in completely different ways. Some count how often people open the app, others track how long people use it, and still others measure how many people keep using the app after several weeks. Without a shared definition, it’s impossible to compare results across studies or know which strategies truly work best.
When researchers did measure engagement, they relied almost entirely on automatic system data—things the app automatically records, like frequency of use (58% of studies) and how often specific features were used (64% of studies). Only a few studies asked people directly about their experience or tracked whether people stayed engaged for long periods. This means we’re missing important information about why people actually stay motivated or quit using apps.
The review found important differences between research apps and commercial apps. Apps developed by researchers for studies more often used behavior-change psychology theories (which are based on scientific understanding of how people change habits), while commercial apps available to the public tended to focus on making the app simple and easy to use. Most studies focused on apps designed for adults who were overweight or obese, so we know less about whether these engagement strategies work for other groups. The studies varied widely in length—some lasted just a few weeks while others ran for months—but long-duration studies rarely adapted their engagement strategies based on how individual users responded over time.
This review builds on earlier research showing that engagement is crucial for digital health tools, but it’s the first comprehensive look specifically at nutrition apps for adults. Previous research in other digital health areas (like fitness apps or mental health apps) identified similar engagement strategies, but nutrition apps appear to have their own patterns. The finding that most studies don’t clearly define engagement aligns with broader concerns in digital health research that the field lacks standardized measurement approaches.
The review only included studies published in English, so important research in other languages may have been missed. Most included studies focused on people in North America and Europe, so findings may not apply to other regions. The review couldn’t determine whether the engagement strategies actually led to better health outcomes because most studies didn’t measure that. Additionally, the review only included studies that were published in academic journals; popular commercial apps that weren’t formally studied are not represented. Finally, because engagement was measured so inconsistently across studies, the review couldn’t identify which specific strategies are most effective.
The Bottom Line
If you’re choosing a nutrition app, look for one that includes goal-setting features and personalization options (these are evidence-based strategies used in most research apps). Moderate confidence: Push notifications can help with reminders, but they work best if you can customize them so they don’t become annoying. Low confidence: We don’t yet have strong evidence about which combination of features keeps people most motivated long-term, so choose an app that feels intuitive and matches your personal preferences. Consider apps developed by research institutions, which tend to use behavior-change psychology more consistently than commercial apps.
Anyone considering using a nutrition app should understand that engagement strategies vary widely and aren’t standardized. People with weight management goals should know that most research has focused on apps for this population, so evidence is strongest here. Healthcare providers recommending apps to patients should be aware that many apps lack clear engagement definitions and long-term tracking. App developers should care about this research because it shows the field needs better standards for measuring whether engagement strategies actually work.
Most studies tracked engagement for weeks to a few months. Realistic expectations: You might see initial motivation from notifications and goal-setting features for 2-4 weeks, but maintaining engagement beyond that requires the app to feel personally relevant and easy to use. Long-term success (3+ months) is less common and depends heavily on individual factors like your personal motivation and how well the app fits your lifestyle.
Frequently Asked Questions
What features should I look for in a nutrition app to stay engaged?
Look for apps with goal-setting features, personalization options, and customizable notifications. Research shows these are the most commonly used engagement strategies in nutrition apps. Choose an app that feels intuitive to you personally, since long-term engagement depends on how well it fits your lifestyle.
How do researchers measure if people actually use nutrition apps?
Most studies track how often people open the app and use specific features like food logging. However, only 29% measure long-term retention (whether people keep using it after weeks or months). This inconsistency makes it hard to compare which apps work best across different studies.
Do push notifications really help people stick with nutrition apps?
Push notifications are used in about half of nutrition apps studied, suggesting researchers believe they help. However, the research doesn’t clearly show they’re more effective than other strategies. Notifications work best when customizable so they don’t become annoying.
Why do so many people stop using nutrition apps after a few weeks?
Most apps don’t adapt their engagement strategies based on individual user behavior over time. Research shows long-duration studies rarely adjusted features for different users, which may explain why initial motivation fades. Apps that personalize to your preferences tend to maintain engagement better.
Are commercial nutrition apps as effective as research apps?
Research apps more frequently use behavior-change psychology theories, while commercial apps focus on simple user experience. Neither approach has been proven definitively superior for long-term engagement, so effectiveness depends on which features match your personal preferences and motivation style.
Want to Apply This Research?
- Track your app usage frequency (how many days per week you open it) and which features you actually use (logging meals, viewing goals, reading tips). This mirrors how most research measures engagement and helps you identify which app features genuinely motivate you versus which ones you ignore.
- Set one specific, measurable goal in your nutrition app (like “log meals 5 days per week”) rather than vague goals. Research shows goal-setting is one of the most common engagement features, and pairing it with tracking your actual usage helps you stay accountable and identify what keeps you motivated.
- Check your engagement pattern monthly: Are you using the app more or less frequently? Which features do you actually use? If usage drops below 2-3 times per week, try customizing notifications or changing your goals to re-engage. This long-term monitoring approach addresses the research gap showing that most apps don’t adapt to individual users over time.
This review summarizes research about nutrition app engagement strategies but does not constitute medical advice. Nutrition apps should complement, not replace, guidance from healthcare providers or registered dietitians. Individual results vary based on personal factors, motivation, and app selection. Consult a healthcare professional before making significant dietary changes, especially if you have existing health conditions or take medications. The findings reflect studies published through June 2024 and may not represent all available apps or the most recent developments in nutrition technology.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.