Traditional exercise trackers make you scroll through dropdown menus with hundreds of exercises, pick from confusing categories, and manually enter duration, intensity, and body weight before you get a calorie estimate. Most people give up before they even finish logging. PlateLens takes a completely different approach: just type what you did in plain text, and AI does the rest.
Instead of navigating menus and databases, you simply type a short description of what you did. It can be as simple as "30 min running" or as conversational as "played tennis for about an hour." You can even type in your native language — "45 min de natación," "jugué pádel 45 min," or "cours de yoga 1h" all work perfectly.
Behind the scenes, PlateLens's AI analyzes your text to identify the activity, estimate the duration, and look up the corresponding MET (Metabolic Equivalent of Task) value — a scientifically validated measure of how much energy an activity requires relative to resting. The AI then multiplies the MET value by your body weight and exercise duration to calculate an accurate calorie estimate.
Within two to three seconds, you see the identified activity type and estimated calories burned. If the estimate does not look right — maybe you were going at a lighter pace than usual, or you pushed harder than normal — you can adjust the number with a simple slider before confirming. One tap, and the exercise is logged.
No scrolling through 300 exercises. No guessing which subcategory your workout falls under. You describe what you did in your own words, and the AI figures out the rest.
Most exercise trackers give you a fixed list of activities. If your workout is not on the list, you are stuck picking the closest match and hoping the calorie estimate is somewhere in the right range. PlateLens is not limited to a predefined database.
The AI understands thousands of activities described in virtually any way. "CrossFit class," "light stretching," "heavy bag work," "hiking uphill with a backpack" — it processes all of these and maps them to the appropriate MET values. It handles niche activities, regional sports, and compound descriptions that a dropdown menu could never account for.
It also works in any language. Type in English, Spanish, French, Portuguese, German, or any other language you are comfortable with. "30 min de remo," "cours de yoga," "una hora de bicicleta" — the AI parses the activity and duration regardless of language. You never have to translate your workout into English before logging it.
Internally, the system maps your description to optimized activity categories for accurate MET calculations, but from your perspective, you simply describe what you did however feels natural.
Generic calorie databases show a single number for each exercise — "running burns 400 calories per hour" — as if every person is the same. That number might be based on a 70 kg reference person, which means it is wrong for most people who actually look it up.
PlateLens uses your actual body weight combined with scientifically validated MET values to calculate a personalized calorie estimate. A 60 kg person and a 90 kg person will see meaningfully different calorie burns for the same 30-minute run, because that is how energy expenditure actually works. A heavier body requires more energy to move, and the calculation reflects that.
As you update your weight over time — whether through manual entries or synced data from a smart scale — your exercise calorie estimates automatically adjust. The numbers stay accurate as your body changes, without you having to think about it.
If you use an Apple Watch, Fitbit, or Android wearable connected through HealthKit or Health Connect, PlateLens automatically imports your exercise data. Calories tracked by your wearable appear in your daily totals without any manual effort.
Manual exercise logging in PlateLens is designed to complement wearable data, not conflict with it. If you log an exercise manually on top of wearable-tracked activity, both are counted. There is no complicated deduplication logic to worry about — the two sources work together cleanly.
If you do not have a wearable at all, manual exercise logging fills the gap entirely. You get the same personalized, MET-based calorie estimates that keep your daily energy balance accurate. The app works equally well whether you are wearing a $400 smartwatch or nothing at all.
One of the most debated topics in fitness tracking is whether you should "eat back" your exercise calories. Some people want their burned calories to increase their daily calorie allowance — if you burned 300 calories running, you get 300 more calories to eat. Others, especially those on strict cutting diets, prefer to keep their calorie target fixed regardless of exercise.
PlateLens gives you a simple toggle setting to control this. Turn it on, and burned calories increase your daily allowance. Turn it off, and your calorie target stays the same no matter how much you exercise. There is no right or wrong answer — it depends on your goals and your approach — but PlateLens makes sure the choice is yours.
This is particularly useful for people who find that eating back exercise calories stalls their weight loss. Instead of doing mental math to ignore the extra allowance, you simply turn the setting off and your targets stay clean.
Some days involve more than one type of exercise. Maybe you did a strength session in the morning and went for a walk in the evening. Or you played a sport and then did some stretching. With most trackers, you would need to go through the full logging flow separately for each activity — navigate to the exercise screen, search, select, enter duration, confirm, go back to the home screen, and repeat.
PlateLens lets you quick-select from your frequent exercises and log multiple activities at once. Select three, four, or five items from your list, confirm them together in one tap, and all of them are added to your daily log. No back-and-forth, no repetitive navigation. If you do the same workout routine regularly, the whole process takes just a few seconds.
Your frequent exercises list builds automatically based on what you log, so the activities you do most often are always right at the top — ready to be selected and logged without typing anything at all.
Just type what you did and let AI handle the rest. PlateLens gives you personalized calorie estimates in seconds — no wearable required.