Lifesum is the app people recommend when someone says every calorie tracker feels like a spreadsheet. It is the best-looking product in the category by a clear margin, and unusually among mainstream trackers, it has an actual point of view about how you should eat.
Everything factual below is sourced from Lifesum's own App Store listing or published research, read 23 August 2026. No hands-on testing is claimed. SlimAI makes a competing app and appears near the end.
What Lifesum is
Lifesum AB (com.sillens.iShape) positions the app around choice of eating style. Its listing describes logging by photo, voice, text or barcode, and frames the product as "a revolutionary way to track your meals, enhanced by AI". It claims 65 million users on the same page — a company figure, published by the company.
The real distinction is not the AI logging, which everyone now has. It is that your diet is a setup input rather than a label: pick an eating style and the plans, recipes and food ratings follow it.
What it does well
Design is a real feature, not decoration. The research on tracking says outcomes follow frequency — participants logging on 70.2% of days lost 2.19% of body weight against 1.54% for a sample logging about half the time (Payne et al., 2022, below). An interface people do not resent opening is a legitimate retention mechanism, and Lifesum is the strongest in the category on that axis.
Diet-led actually means diet-led. In most trackers, selecting keto or Mediterranean changes a string on your profile. In Lifesum it shapes the plans you are given and the recipes you see. For someone who has decided how they want to eat and needs help executing it, that is the whole product working correctly.
The recipe library is content, not filler. Meal plans arrive with grocery lists. This is a different job from calorie counting — it answers "what do I cook tonight" rather than "what did I just eat" — and it is genuinely useful to people who stall at the decision rather than the arithmetic.
Food ratings teach. Rating foods for quality rather than only counting them nudges toward better choices over time. It is coarse next to full nutrient tracking, but it is doing something a bare calorie number does not.
Sustained maintenance. Version 23.12.1 shipped 10 August 2026, on an app that first launched over a decade ago.
Where it gets harder
The annual price sits at the top of the category
As of 23 August 2026, Lifesum's App Store in-app purchase list reads:
| Listed product | Price |
|---|---|
| Lifesum Premium 1 year | $99.99 |
| Lifesum Premium 1 year | $119.99 |
| Lifesum Premium 6 Months | $69.99 |
| Lifesum Premium 3 Months | $39.99 |
| Lifesum Premium 3 Months | $29.99 |
| Lifesum Premium | $44.99 / $29.99 / $21.99 |
Two things follow. First, $99.99–$119.99 a year is at the top end of the tracker market, and it is worth comparing that against what other apps include in their base subscription before committing. Second, the same duration appears at two prices, so the offer you are served decides your cost — check your own screen rather than any figure quoted in a review, including this one.
The free tier is a demo of the paid tier
Lifesum's own description is candid: the app is "free to download and use with limited features". The named free features — calorie counter, macro tracker, water tracker, meal plans with grocery lists, fitness integration, Life Score — read generously, but the depth of the diet-specific plan and recipe content is the paid product, and that content is the reason most people install Lifesum in the first place.
This is the most common complaint from long-term users, and it is a structural one rather than a grievance: over the years, more of what people considered core moved behind the subscription.
Plans are templates, not adaptive models
A diet-led plan is chosen, not derived. It does not recalculate from your logged intake and weight trend the way an adaptive-expenditure model does. For a beginner that is fine and arguably better — fewer moving parts. For someone whose weight has plateaued, a fixed template is exactly the wrong tool, because the thing that needs to change is the number the template assumed.
Nutrient depth is not the point
Lifesum tracks calories and macros well and does not attempt serious micronutrient coverage. That is a scope decision, not a defect, but it rules the app out for anyone tracking because of a deficiency or a supervised plan. It also inherits the category-wide database problem: across 14 validation studies of 12 dietary-record apps, every app underestimated energy intake, pooled at −202 kcal/day, and the error shrank to −57 kcal/day when the app and the reference shared a food table (Zhang et al., 2021).
Who should use Lifesum
- You have chosen an eating style and want help executing it. Keto, Mediterranean, high-protein — this is the mainstream app that treats that choice as structural.
- You abandoned tracking because the app was joyless. Design is not a tiebreaker here; it is the reason to pick it.
- You want to be told what to cook. Plans plus grocery lists solve a different problem from calorie counting, and solve it well.
- You are new and macros feel like homework. Food ratings and Life Score are a softer entry than gram targets.
Who might want something else
- You want the lowest annual cost. This is near the top of the market.
- You are past a plateau and need targets that move. Templates do not adapt.
- You need verified micronutrient data.
- You want body composition, not just weight.
Alternatives worth considering
YAZIO — the closest like-for-like swap. Same plan-and-recipe model, strong European food coverage, ordinarily lower annual pricing. If you like what Lifesum does but not what it charges, start here.
Cronometer — for accuracy over aesthetics. Lab-verified entries, 84 nutrients, Gold listed at $10.99/month or $59.99/year, and a free tier capable enough to use indefinitely. It is less pleasant to use and considerably more correct.
SlimAI Calorie Tracker — for logging speed and for targets that move. Preferred diet, favourite cuisine and region are setup inputs that shape your calorie and macro targets rather than labelling your profile; every AI estimate opens as an editable ingredient list before it saves; and AI Body Assessment estimates body fat percentage from two photos, so a stalled scale is not the only signal you have. Where SlimAI does not compete: it has nothing like Lifesum's recipe library or its interface polish, and its food database is curated and smaller. Current pricing here.
Sources and References
- Lifesum App Store listing — rating, ratings count, in-app purchase list, the 65 million user claim and the free-version feature list, read 23 August 2026 — https://apps.apple.com/us/app/lifesum-ai-calorie-counter/id286906691
- Payne JE, Turk MT, Kalarchian MA, Pellegrini CA (2022). Adherence to mobile-app-based dietary self-monitoring — impact on weight loss in adults. Obesity Science & Practice 8(3):279–288. doi:10.1002/osp4.566 — https://pmc.ncbi.nlm.nih.gov/articles/PMC9159560/
- Zhang L, Misir A, Boshuizen H, Ocké M (2021). A systematic review and meta-analysis of validation studies performed on dietary record apps. Advances in Nutrition 12(6):2321–2332. doi:10.1093/advances/nmab058 — https://pmc.ncbi.nlm.nih.gov/articles/PMC8634532/
Related reading: best Lifesum alternatives, SlimAI vs Lifesum, why two calorie trackers disagree on the same meal, and the free macro calculator.
