Under a key tied to your account
Your health data, photographs included, is encrypted per member on Loopa’s servers.
Weight and progress
See the trend, not just today’s number.
Track weight over time and add the signals a scale cannot show: measurements, photographs and the months either side of this morning.
Included in Loopa Basic Progress photos are free too.
Why it matters
One weigh-in is a point. The trend is the pattern.
A scale reading is the sum of body mass, water, glycogen, salt, and what is still in transit. Day to day those move several pounds on their own, which is why a single number is such bad feedback and why people quit on a Tuesday that meant nothing.
You weigh inWhenever suits you. Daily is easiest to read
Loopa smooths itA trend line that leans on recent days
You see directionInstead of arguing with one morning
The rest joins itPhotos, measurements, food and movement
How you see it move
Four ways to watch the same thing
The scale is one of them, and on its own it is the least informative.
The trend line
A line that ignores the noise
Loopa draws a smoothed line through your weigh-ins using an exponentially weighted moving average. Recent days count for more, and the influence of any one morning halves over about a week.
It helps you see the direction. It is a smoothing method rather than a more accurate weight, and Loopa says so on the screen: the line smooths day-to-day water and glycogen shifts.
It refuses rather than guesses. Under three weigh-ins, or a span shorter than a week, it tells you what is missing instead of drawing a line through nothing.
Free- Free, over a rolling window on Loopa Basic
- Raw weigh-ins and the smoothed line together
- Your goal marked on the same chart
- Says when it does not have enough to draw
Progress photos
The change a scale cannot show
Some months the scale barely moves and everything else does. Photographs are the record that catches it.
One row per pose, oldest to newest, opening at the newest end. A match-pose overlay lines the next shot up with the last one. Compare puts two dates side by side, and it will only pair the same pose, because a front shot next to a back shot is not a comparison.
Free, on all three surfaces, and not subject to the rolling window. Your whole set stays visible on Loopa Basic.
Free- Free to take, view, compare and delete
- A timeline per pose, and a two-date comparison
- Match-pose overlay so shots line up
- Fix a pose or a date you got wrong
- Encrypted, and never used to advertise to you
Measurements
Where the change actually happened
Waist, chest, hips, thigh, arm and neck. A waist that drops while the scale holds still is the most common shape of a good month, and it is invisible without a tape.
Loopa can also derive a body-fat estimate from them. It names the formula it used, and a figure you enter yourself always wins.
Premium- Six sites, logged as often as you like
- A body-fat estimate, labelled as an estimate
- Part of Loopa Premium
- Deleting one you logged stays free
The forecast
A range, and a refusal when it should refuse
Loopa projects your current rate forward and shows a range rather than one confident date, with a band either side of it.
It is bounded on purpose. It will not project an intake below 1,500 calories a day for men or 1,200 for women. It stops at a year out, because past that the band is wider than the line. And when your current plan does not reach your goal at all, it says so rather than producing a date that flatters you.
A forecast is an estimate built on one assumption: that your current rate continues. Nothing about a body guarantees that.
Premium- A range with a confidence band, not a single date
- Bounded by an intake floor it will not project below
- Stops at a year out
- Says plainly when your plan does not get there
- Part of Loopa Premium
Where the numbers come from
Which numbers you gave Loopa, and which it worked out
You entered itYour weigh-ins, your measurements and any body-fat figure you type. Loopa keeps them exactly as given and never overwrites yours with an estimate.
MeasuredA weight arriving from a connected scale or Apple Health. Premium, because device sync is.
EstimatedThe trend line, the body-fat estimate and the forecast. All three are calculated, all three are labelled, and the body-fat estimate names which formula produced it.
Privacy
Photographs are the most personal thing in here
So they are treated that way.
Because there is no advertising
No ad SDK, no advertising ID, no tracking pixel, and never your health data in analytics, on either plan. Nothing in your record is sold or used to target you.
Completely
Delete a photo and it goes. Delete your account and the whole record goes with it.
What Loopa can see
What it costs
Weight and progress: free versus Premium
Only the progress half. There is a full comparison for everything else.
Start here
Loopa Basic
Everything you need to watch the direction.
- Unlimited weigh-ins
- The trend line and your goal
- Progress photos: take, view, compare, delete
- The photo timeline, with no time limit on it
- Total lost since you started, over your whole history
- A rolling 30 days of trends
- Weight badges as you pass each milestone
- No ads, and no card
Loopa Premium
The whole record, and the tools around it.
- Everything in Loopa Basic
- Body measurements, and the body-fat estimate
- The weight forecast and its range
- Full history, back to your first weigh-in
- The rich trends surface
- Your personal report, and a clinician share report link
- CSV and spreadsheet export
- Milestone and before-and-after share cards
Keep reading
What to look at next
Why weight jumps day to day Water, glycogen and salt, and what the trend line is for.
Activity and movement Steps, active minutes and sessions, free, in the same record.
Food logging The other half of the picture, and the free half.
Reports and export Your personal report as a PDF, and your raw data as CSV or a spreadsheet.
FAQ
Questions about tracking progress
The ones that come up before the first weigh-in.
Is weight tracking free?
Yes. Logging a weight is free, the chart is free, and Loopa Basic reads a rolling 30 days of it. Nothing is deleted when the window rolls. One figure is deliberately not clamped: your total lost since you started is calculated over your whole history even on Loopa Basic, because a partial number there would be wrong rather than merely shorter.
Are progress photos free?
Yes, on all three surfaces. Taking them, viewing them, deleting them, the timeline, the before-and-after comparison, and correcting a pose or a date are all part of Loopa Basic. They are also the one thing not subject to the rolling window, so a free account keeps the whole set.
What is the trend line?
A smoothed line through your weigh-ins. Loopa uses an exponentially weighted moving average, which leans on recent days and has a half-life of about a week, so one heavy Monday does not swing it and one light Friday does not either. It makes the direction easier to see; it is a smoothing method, not a truer weight.
Why does my weight jump around day to day?
Mostly water, glycogen and what is still in transit, which together move several pounds without any change in body fat. That is the whole reason for a trend line. There is a longer explanation in the guide.
When does Loopa refuse to show a trend?
Under three weigh-ins, or when they span less than a week, it says so and tells you what is missing rather than drawing a line through two points.
How does the weight forecast work?
It projects your current rate forward and shows a range rather than a single date. It is bounded on purpose: it will not project an intake below 1,500 calories a day for men or 1,200 for women, it stops at a year out, and when your current plan does not reach your goal at all it says that instead of producing a date. A forecast is an estimate built on the assumption that your current rate continues, which nothing can guarantee. The forecast screen is Premium.
Can I track my weight in kilograms, pounds or stones?
Yes. You choose Metric or Imperial (US) when you sign up, and you can pick body weight in kilograms, pounds, or stones and pounds on its own, with height, body measurements and the rest each set the same way. Loopa keeps your weigh-ins in one standard form and converts them for display, so switching never changes a number you entered: 150 lb stays 150 lb. The setting is free on every plan and follows you to every device.
What body measurements can I track?
Waist, chest, hips, thigh, arm and neck, plus a body-fat percentage you enter. Body measurements are Premium to read and to log, and deleting one you logged stays free so a lapsed account can still remove its own record.
Is the body-fat estimate accurate?
It is an estimate from a formula, not a measurement. Loopa uses the U.S. Navy circumference method where it has your waist and neck, Relative Fat Mass where it has a waist and a height, and a BMI-based formula otherwise, and it names which one it used. These formulas carry meaningful error for an individual. A figure you enter yourself always wins over the estimate.
Can I export my data?
With Premium, as a raw data export in CSV or a spreadsheet. Your personal report is separate and saves as a PDF, and a clinician share report is the one you send to a clinician as a link. Viewing your own trends in the app is free. Reports and export.
Weigh in tonight. The line starts building tomorrow.
Weight logging, the trend line and progress photos are part of Loopa Basic. The useful part arrives in the second week.