A smartphone app using action planning helped 57% of Appalachian adults meet their sugar drink reduction goals in a 2026 study of 119 participants. According to Gram Research analysis, the iSIPsmarter app combined personalized goal-setting with barrier identification and strategy selection, supported by daily text message tracking. Participants who completed the action planning exercises reduced their sugary drink intake and lost an average of 2.1% body weight by 6 months, with 54% achieving their personal weight loss goals.
Researchers tested a smartphone app called iSIPsmarter designed to help people in Appalachia drink fewer sugary beverages. The app used action planning—where users set goals and identify obstacles—combined with text message tracking. Among 119 participants, 80% completed all five action plans, and 57% met their sugar drink reduction goals by the end of the program. The study shows that personalized digital tools with built-in planning features can effectively help people change their drinking habits, especially in rural areas where access to health programs is limited.
Key Statistics
A 2026 study of 119 Appalachian adults found that 80% completed all five action planning sessions in the iSIPsmarter app, with 57% meeting their self-selected sugar drink reduction goals by week 9.
According to research reviewed by Gram, 46% of participants in the iSIPsmarter intervention achieved the recommended sugar drink intake of less than 8 ounces per day, with 53% selecting new strategies during action planning.
A 2026 digital health intervention study found that participants who used action planning achieved an average weight loss of 2.1% by 6 months, with 54% of the 90 participants meeting their personal weight loss goals.
Research shows that 62% of participants who completed weight action plans in the iSIPsmarter app modified their barriers, with the top obstacles being cravings for sweets, portion sizes, and difficulty eating healthy foods.
The Quick Take
- What they studied: How well a smartphone app helps people reduce sugary drink consumption by using action planning—a technique where users set goals, identify barriers, and choose strategies to overcome them.
- Who participated: 119 adults from rural Appalachian counties, mostly white women aged 18-44 with college education. These are communities that often have limited access to health programs.
- Key finding: 57% of participants met their personal sugar drink reduction goals, and 46% achieved the recommended limit of less than 8 ounces per day. Most participants (80%) completed all five action planning sessions in the app.
- What it means for you: If you struggle to cut back on sugary drinks, a structured app that helps you plan specific strategies and track progress may work better than willpower alone. This is especially helpful if you live in an area without easy access to health coaches or programs.
The Research Details
Researchers recruited 119 adults from rural Appalachian counties and gave them access to the iSIPsmarter app for 9 weeks. The app had six modules (called Cores), and five of them included action planning exercises. Participants set their own goals for how much sugary drink they wanted to consume and their target weight. In each module, they identified barriers (obstacles) they faced and selected strategies to overcome them. They also received text message reminders to track their drinks and weighed themselves weekly on a special scale that sent data to the app.
The researchers tracked how many action plans each person completed, how difficult participants found the tasks, whether they achieved their goals, and what barriers and strategies they chose. They followed participants for 9 weeks and again at 6 months to measure weight changes.
This approach is called a process evaluation, which means the researchers focused on understanding how the app worked and how people used it, rather than just measuring final outcomes.
Understanding how digital tools help people change behavior is important because many apps exist, but we don’t always know which features actually work. By studying the action planning process specifically, researchers can help app developers create better tools. This is especially valuable for rural communities where people may not have access to in-person health coaching.
The study tracked actual app usage and completion rates, which is reliable data. However, the sample was mostly college-educated white women from one region, so results may not apply equally to all populations. The study didn’t include a control group (people not using the app), so we can’t be certain the app caused the changes rather than other factors. The 6-month follow-up had slightly fewer participants, which is normal but means some data is less complete.
What the Results Show
Participants showed strong engagement with the app’s action planning feature. On average, people completed 4.5 out of 5 possible action plans, and 80% finished all five. This high completion rate suggests the app was user-friendly and kept people motivated.
When it came to reducing sugary drinks, results were moderate but meaningful. By week 9, 57% of participants met their self-selected sugar drink goals (the targets they personally chose). When measured against the health recommendation of less than 8 ounces per day, 46% achieved this standard. Nearly half the group achieved their weekly sugar drink goals, and another third made progress toward them, even if they didn’t fully meet their targets.
For weight loss, participants who set weight loss goals (94 out of 119) lost an average of 1.3% of their body weight by week 9. By 6 months, this increased to 2.1% average weight loss. About 61% met their personal weight goals by week 9, and 54% maintained this by 6 months. These are modest but real changes that can improve health.
The study revealed important information about how people adapted their strategies. About 45% of participants changed which barriers they focused on during action planning, and 53% selected new strategies as they progressed through the program. This flexibility suggests people learned what worked for them and adjusted accordingly.
The top barriers people identified for reducing sugary drinks were caffeine dependence, taste preference, and habit. For weight loss, the main obstacles were cravings for sweets, portion sizes, and difficulty eating healthy foods. Understanding these specific barriers helps explain why behavior change is challenging and where support is most needed.
Participants’ perception of difficulty remained fairly consistent throughout the program: about 48% found tasks impossible or hard, 29% found them neutral, and 24% found them easy or very easy. This suggests the app maintained an appropriate challenge level—not too easy to be boring, not too hard to be discouraging.
Previous research shows that action planning is an effective behavior change technique, but most studies haven’t examined how digital tools deliver this technique. This study fills that gap by showing that smartphone-based action planning can work as well as in-person coaching for some people. The high completion rates (80%) are notably better than many digital health programs, which often see dropout rates above 50%. The weight loss results (2.1% by 6 months) are consistent with other digital interventions, though modest compared to intensive in-person programs.
The study had several important limitations. First, the sample was not diverse—mostly college-educated white women aged 18-44. Results may differ for men, older adults, or people with less education. Second, there was no control group, so we can’t prove the app caused the changes rather than other factors like seasonal changes or personal motivation. Third, some participants dropped out by the 6-month follow-up, which could bias results if people who quit were different from those who stayed. Finally, the study measured self-reported data (what people said they drank and weighed), which can be less accurate than objective measurements.
The Bottom Line
If you want to reduce sugary drink consumption, using a structured app with action planning features appears helpful (moderate confidence). Set a specific goal for how much you want to drink, identify your personal barriers, and choose concrete strategies to address them. Track your progress regularly through the app. This approach works best when combined with self-monitoring (tracking what you actually drink). For weight loss, expect modest results (1-2% body weight loss over several months), which is realistic and sustainable.
This approach is particularly valuable for people in rural areas with limited access to health programs, people who prefer digital tools over in-person coaching, and anyone struggling with sugary drink habits. It may be less suitable for people without smartphone access or those who need intensive, personalized coaching. The study focused on adults; results may differ for teenagers or children.
You should expect to see initial progress within 9 weeks, with more substantial changes by 6 months. Don’t expect dramatic results—the average weight loss was about 2% over 6 months, which is healthy and sustainable. Consistency with the app and honest tracking are more important than perfection.
Frequently Asked Questions
Can a phone app really help me drink less soda and sugary drinks?
Yes, according to a 2026 study, 57% of people using the iSIPsmarter app met their sugar drink reduction goals. The app works by helping you identify specific barriers (like caffeine cravings) and choose concrete strategies to overcome them, plus tracking your progress daily.
How much weight can I expect to lose using an app like this?
The study found average weight loss of 2.1% over 6 months, with 54% of participants reaching their personal goals. This is modest but healthy and sustainable—for a 200-pound person, that’s about 4 pounds, which doctors consider realistic and maintainable.
What are the most common barriers to cutting back on sugary drinks?
The study identified three main barriers: caffeine dependence, taste preference, and habit. Understanding your specific barrier helps you choose an effective strategy—for example, switching to unsweetened iced tea if caffeine is your main challenge.
Do I need to use the app every single day for it to work?
The study showed that 80% of participants who completed regular action planning sessions achieved their goals. Daily tracking through text messages and the app appears important, but the structured planning process itself—done weekly—was the key to success.
Is this app designed for people like me in rural areas?
The iSIPsmarter app was specifically tested in rural Appalachian communities with limited health program access. It’s designed for people who prefer digital tools over in-person coaching and may not have easy access to health professionals.
Want to Apply This Research?
- Track daily sugary drink intake in ounces and weekly weight. Set a specific weekly goal (e.g., ‘reduce from 32 oz to 16 oz per week’) and monitor progress against this target. Use the app’s barrier identification feature weekly to stay aware of obstacles.
- Complete one action plan per week in the app. For each plan, identify one specific barrier you face (e.g., ‘I crave caffeine in the afternoon’) and select or create one concrete strategy (e.g., ‘Drink unsweetened iced tea at 3 PM instead’). Adjust your strategies based on what actually works for you.
- Use the app’s text message reminders to log drinks daily and weight weekly. Review your progress every 2 weeks and modify your barriers and strategies if needed. Celebrate small wins—meeting 50% of your goal is still meaningful progress.
This research describes how one specific digital intervention worked for a particular group of adults in rural Appalachia. Results may not apply equally to all populations, and individual results vary. Before making significant dietary changes or starting a weight loss program, consult with your healthcare provider, especially if you have diabetes, heart disease, or take medications affected by caffeine or sugar intake. This study did not include a control group, so we cannot definitively prove the app caused the changes rather than other factors. Digital apps work best as part of a comprehensive approach that may include professional guidance, dietary changes, and physical activity.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.