Science & Sources

How Uncount works

Last updated: 12 November 2026

Uncount is built on research about stress, sleep, cravings and weight. This page explains, in plain words, what each number in the app means, how it is calculated, and what the research behind it says.

The idea: stress, sleep and cravings#

Most weight-loss apps focus on calories. Uncount focuses on what makes eating less hard in the first place.

• Stress and sleep predicted success. In a 6-month weight-loss program with 472 adults, people with lower stress and mid-range sleep at the start were more likely to succeed, and weight loss went together with falling stress (Elder et al. 2012).
• Short sleep changed what was lost. On the same diet, people given 5.5 instead of 8.5 hours in bed lost less of their weight as fat and more as lean mass (Nedeltcheva et al. 2010).
• Short sleep is linked to hunger hormones. Less sleep was linked to lower leptin (which signals fullness) and higher ghrelin (which signals hunger), and in one study to more hunger and appetite (Spiegel et al. 2004; Taheri et al. 2004).
• Stress is linked to belly fat. Women with more central fat released more of the stress hormone cortisol in response to stress (Epel et al. 2000).
• Counting adds pressure. In a 3-week study, tracking calories raised how stressed people felt, and restricting calories raised cortisol (Tomiyama et al. 2010).
• Strict diets rarely last. A review of long-term diet studies found that one third to two thirds of dieters regained more weight than they had lost (Mann et al. 2007).

This is why Uncount works on stress, sleep, cravings and habits, and has you eat in planned meal windows instead of counting.

The MRI (Mental Readiness Index)#

The MRI is a score from 0 to 100. It is calculated from three ratings you give in your evening check-in:

The score is shown in three bands:

• Resisting: below 45
• Okay: 45 to 77
• Optimal: 78 and above

The MRI sums up, in one number, the factors that research links to weight-loss success (see the idea above).

What the MRI is not. It is a self-reported wellness indicator. It does not measure hormones, metabolism or anything in your body. It is not a medical test, and it has nothing to do with an MRI scan (magnetic resonance imaging).

Your plan estimate ("up to X× faster")#

After onboarding, the app shows how much faster you could reach your goal with Uncount, from 1.4× up to 2.8×.

How it's calculated

• Everyone starts at 1.4×.
• The estimate goes up the more of these you report: stress, sleep debt, emotional eating, craving moments and past diet derailers, plus a little more if your weight came back after an earlier diet. The idea is that the more is working against you today, the more there is to gain.
• The maximum is 2.8×.
• It compares two paces: your estimated pace with Uncount, as your readiness improves, and the pace if your readiness stayed where it is today.

What it is. This is Uncount's own model: an illustrative estimate, not a clinically measured result and not a guarantee.

The research behind it. In the study by Elder and colleagues, participants with the lowest stress and mid-range sleep had about double the success rate of those with the highest stress who slept 6 hours or less (Elder et al. 2012). We use this as support for the direction of the estimate, not for its exact size.

Your estimated arrival date#

The app estimates the month you'll reach your goal weight.

• From readiness to pace. Your MRI is turned into an expected weekly pace of about 0.2 to 0.8 kg per week: slower when readiness is low, faster when it is high.
• Always within safe limits. The pace is capped at about 1% of your body weight per week, and never more than 1 kg per week. That stays within common public-health guidance of about 0.5 to 1 kg (1 to 2 lb) per week (CDC; NHS).
• Your scale takes over. As your weekly weigh-ins come in, the estimate leans more and more on your real weight trend, up to 80%. So a plateau moves the date out, and steady progress keeps it on track.
• It moves. Weight loss is not a straight line: the body adapts as weight changes (Hall et al. 2011). The date is a moving estimate, not a promise.

The exercises#

The exercises in Practice are based on these findings:

• Double Breath (two inhales and a long exhale, also called a "physiological sigh"): five minutes a day of cyclic sighing improved mood and lowered breathing rate more than mindfulness meditation in a one-month study (Balban et al. 2023).
• Meditation: a large review found moderate evidence that mindfulness meditation programs improve anxiety, depression and pain (Goyal et al. 2014).
• Tense & Release (progressive muscle relaxation): tensing and relaxing muscle groups increased relaxation compared with a control group (Toussaint et al. 2021).
• Brain Dump: writing a to-do list for five minutes before bed helped people fall asleep faster than writing about tasks already done (Scullin et al. 2018). In Uncount, nothing you write in Brain Dump is saved.
• Mindfulness and eating: mindfulness-based programs were moderately effective for weight loss and improved eating behaviours linked to weight gain (Carrière et al. 2018).
• Eating slowly: eating the same meal slowly led people to eat less and feel fuller (Andrade et al. 2008).
• Everyday movement: everyday activity outside the gym (called NEAT) explained large differences in how much fat people gained when overfed (Levine et al. 1999), and short light walks that break up sitting lowered blood sugar and insulin after meals (Buffey et al. 2022).

The lessons#

Uncount's 8 short lessons cover stress, sleep, cravings, hunger, movement and consistency. They put the research on this page into simple, everyday language. Simplifying means leaving out detail, so for the full picture, see the sources below.

Limitations#

• Self-reported data. The MRI and estimates rely on your own ratings, which naturally vary from day to day.
• Group research. The studies describe averages across groups of people. Your body may respond differently.
• No Uncount trial yet. There is no clinical trial of Uncount itself. The plan estimate and arrival date are model-based estimates, not proven results.

Sources#

1. Elder CR, Gullion CM, Funk KL, et al. Impact of sleep, screen time, depression and stress on weight change in the intensive weight loss phase of the LIFE study. Int J Obes (Lond). 2012;36(1):86–92. PubMed · Full text
2. Nedeltcheva AV, Kilkus JM, Imperial J, et al. Insufficient sleep undermines dietary efforts to reduce adiposity. Ann Intern Med. 2010;153(7):435–441. PubMed · Full text
3. Spiegel K, Tasali E, Penev P, Van Cauter E. Sleep curtailment in healthy young men is associated with decreased leptin levels, elevated ghrelin levels, and increased hunger and appetite. Ann Intern Med. 2004;141(11):846–850. PubMed
4. Taheri S, Lin L, Austin D, et al. Short sleep duration is associated with reduced leptin, elevated ghrelin, and increased body mass index. PLoS Med. 2004;1(3):e62. PubMed · Full text
5. Epel ES, McEwen B, Seeman T, et al. Stress and body shape: stress-induced cortisol secretion is consistently greater among women with central fat. Psychosom Med. 2000;62(5):623–632. PubMed
6. Tomiyama AJ, Mann T, Vinas D, et al. Low calorie dieting increases cortisol. Psychosom Med. 2010;72(4):357–364. PubMed · Full text
7. Mann T, Tomiyama AJ, Westling E, et al. Medicare's search for effective obesity treatments: diets are not the answer. Am Psychol. 2007;62(3):220–233. PubMed
8. Hall KD, Sacks G, Chandramohan D, et al. Quantification of the effect of energy imbalance on bodyweight. Lancet. 2011;378(9793):826–837. PubMed · Full text
9. Balban MY, Neri E, Kogon MM, et al. Brief structured respiration practices enhance mood and reduce physiological arousal. Cell Rep Med. 2023;4(1):100895. PubMed · Full text
10. Goyal M, Singh S, Sibinga EM, et al. Meditation programs for psychological stress and well-being: a systematic review and meta-analysis. JAMA Intern Med. 2014;174(3):357–368. PubMed · Full text
11. Toussaint L, Nguyen QA, Roettger C, et al. Effectiveness of progressive muscle relaxation, deep breathing, and guided imagery in promoting psychological and physiological states of relaxation. Evid Based Complement Alternat Med. 2021;2021:5924040. PubMed · Full text
12. Scullin MK, Krueger ML, Ballard HK, et al. The effects of bedtime writing on difficulty falling asleep: a polysomnographic study comparing to-do lists and completed activity lists. J Exp Psychol Gen. 2018;147(1):139–146. PubMed · DOI
13. Carrière K, Khoury B, Günak MM, Knäuper B. Mindfulness-based interventions for weight loss: a systematic review and meta-analysis. Obes Rev. 2018;19(2):164–177. PubMed
14. Andrade AM, Greene GW, Melanson KJ. Eating slowly led to decreases in energy intake within meals in healthy women. J Am Diet Assoc. 2008;108(7):1186–1191. PubMed
15. Levine JA, Eberhardt NL, Jensen MD. Role of nonexercise activity thermogenesis in resistance to fat gain in humans. Science. 1999;283(5399):212–214. PubMed
16. Buffey AJ, Herring MP, Langley CK, et al. The acute effects of interrupting prolonged sitting time in adults with standing and light-intensity walking on biomarkers of cardiometabolic health in adults: a systematic review and meta-analysis. Sports Med. 2022;52(8):1765–1787. PubMed · Full text
17. Centers for Disease Control and Prevention (CDC). Steps for Losing Weight. cdc.gov
18. NHS. Tips to help you lose weight. nhs.uk

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