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Features, pricing and Editor Score side by side — to help you pick the right health & lifestyle tool in 2026.
Quick verdict
On our Editor Score, Lumen and Simple land almost level. Pick Lumen if you want handheld breath analysis of fat vs carb burning; choose Simple for AI coach Avo with daily personalized actions and check-ins. On pricing, Simple is the one with a free or freemium plan, so it's the cheaper place to start.
| Pricing | Subscription | Freemium |
| Free tier | ||
| Best for | handheld breath analysis of fat vs carb burning | AI coach Avo with daily personalized actions and check-ins |
Metabolism tracker with AI nutrition guidance
AI weight-loss coach focused on habits over calorie counting
Choose Lumen if…
Choose Simple if…
Your use case decides this one: Lumen leans into handheld breath analysis of fat vs carb burning, while Simple is built for AI coach Avo with daily personalized actions and check-ins. Weigh features and pricing for your workflow. Simple is the lower-cost place to start thanks to its free or freemium plan; the other is worth a trial if its feature set fits better.
Neither is universally better — it depends on your budget and which features matter most. The side-by-side breakdown above shows where each one wins.
Lumen (subscription) is best for handheld breath analysis of fat vs carb burning, while Simple (freemium) is best for AI coach Avo with daily personalized actions and check-ins. See the full feature and pricing comparison above.
Simple has a free or freemium plan, so it's the cheaper way to start. For paid plans, check each tool's current pricing on its review page.
Simple is usually the easier starting point thanks to a lower barrier to entry. Beginners should favour a free tier and a simple interface over raw power.
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Last updated August 2026. Comparisons are ranked by our Editor Score (features, value and pricing, blended with verified user reviews where a tool has them) — see our methodology.