What makes PepLabo a better MacroFactor alternative?
MacroFactor answers the question “how much should I eat this week?”. PepLabo answers a different one: “what is due today, from which vial, and where did I inject last time?”. These are the places where that difference matters.
A moving calorie target is not a dose schedule
MacroFactor’s strength is change: it re-estimates your expenditure and adjusts your targets at each weekly check-in [1]. An injection routine works the other way. The schedule is fixed by you or your clinician, and the job is to follow it, record it and notice when something slips.
PepLabo is built for that job. The first screen shows your next dose, the compound, the time and the vial it will be drawn from. Logging it takes one tap from the app, a widget or the Live Activity, and the rest of the day is arranged around that entry.
Bottom line: if your plan is a set of doses rather than a set of macros, PepLabo matches the shape of what you actually do.
Vials, mixing and syringe units in one place
Peptide routines often start with a lyophilised powder and bacteriostatic water. PepLabo’s calculator takes the vial amount, the water you add and the dose you were given, and shows the result as units on an insulin syringe. Save the vial, and every dose you log draws it down, so a vial running low is visible well ahead of time.
We did not find vial tracking, reconstitution or syringe tools in MacroFactor’s listing or website [1][3]. That is not a flaw in a macro tracker; it simply is not what the product was made for.
Bottom line: PepLabo takes over the scrap of paper and the separate calculator that often sit next to a peptide routine.
Programs with on weeks, off weeks and site rotation
Real routines have structure. You may run two compounds on different days, pause for a planned break, or move between abdomen, thigh and arm. PepLabo gives each program its own schedule, on and off periods and weeks off, and stores the site with every dose so the rotation stays visible.
An estimated level chart, drawn from a half-life you enter from your own source, shows how logged doses overlap across days and weeks. It is a picture of your own log, not medical advice.
Bottom line: PepLabo keeps the structure of a cycle intact instead of reducing it to a list of entries.
Side effects and progress, logged beside the dose
MacroFactor’s health insights cover expenditure, a smoothed weight trend, habits and periods [1]. We did not find symptom or side-effect logging there [1]. PepLabo can ask how you feel a few hours after a dose, and its check-in records energy, sleep, mood, symptoms and overall severity, linked to a dose from the last 72 hours.
Weight sits against a goal you set, progress photos sit in the same tab, and Cycle Story pulls a cycle together when it ends. Everything stays next to the doses it relates to.
Bottom line: when you want to see how a routine feels as well as what the scale says, PepLabo keeps both in one record.
Reminders that catch a missed dose, even abroad
A dose app is only as good as its timing. PepLabo can remind you before a dose, at the scheduled time and again if the dose has not been logged, so a late injection does not pass silently.
On Pro, travel mode lets you choose a destination time zone and how to handle the shift, and your dose reminders follow that choice. We did not find dose or medication reminders in MacroFactor’s listing [1].
Bottom line: PepLabo’s notifications are built around doses and keep working when your clock moves.
Private by default: no account and no analytics
You can install PepLabo and start tracking without signing up. Records stay on your phone, and the app contains no analytics, advertising or tracking SDKs. Sign-in is needed only for Pep AI, and before your first message the app shows what will be sent and states that dose amounts never are.
Moving to a new phone is done with an export file instead of a cloud account. That is a deliberate trade: a little less convenience across devices in exchange for more control over where injection records live.
Bottom line: if keeping health records on your own device matters, PepLabo is designed around that choice.
A report for your clinician and a habit that sticks
PepLabo Pro produces a PDF of your dose log to keep or bring to an appointment, and the full data export works on the free plan. Side-effect check-ins, weight history and photos sit in the same app, so the conversation can start from your record.
Keeping that record complete is mostly about showing up. PepLabo tracks a logging streak, awards badges for milestones such as a first weigh-in, and on Sundays Pep, the character inside the app, recaps the week.
Bottom line: PepLabo turns daily logging into a record you can use, and makes the daily part lighter to keep up.
Where MacroFactor is still better
MacroFactor is a carefully built product for anyone whose goal is expressed in calories and macros. In that lane it offers things PepLabo does not try to match:
- An expenditure estimate and coaching algorithm that adjusts calorie and macro targets every week [1].
- A verified food database with micronutrient breakdowns, recipes and a timeline-style food log [1].
- A Weight Trend insight, plus built-in period and habit trackers [1].
- An iPad app [1], and a separate MacroFactor Workouts app for training [3].
Bottom line: PepLabo pulls ahead once the daily task is a dose, a vial and a cycle rather than a macro target.
Pricing: a free core against a premium-only app
In PepLabo, everything an injection routine needs each day is free: dose logging, reminders, vials, injection sites, the reconstitution calculator and the research library. PepLabo Pro costs $9.99 a month or $59.99 a year in the US, and eligible new subscribers get 3 days free on the yearly plan. Pro adds access to Pep AI chat, meal estimates from a photo, voice or restaurant menu, Apple Health, Health Connect and WHOOP data, widgets, travel mode and PDF reports.
MacroFactor describes itself as a premium app with a 7-day trial and no free subscription tier. Its US prices are $11.99 a month, $47.99 for six months or $71.99 a year [1].
Bottom line: if your main need is the injection routine, PepLabo covers it without a subscription, and Pro’s listed US prices sit below MacroFactor’s monthly and yearly plans [1], though the two subscriptions pay for different things.
Keeping MacroFactor for macros, PepLabo for injections
If MacroFactor already runs your nutrition and you like its weekly check-ins, there is no need to drop it. Leave calories and macros there and move the injection side to PepLabo: doses, vials, sites, cycles and side effects. The two apps have no direct link, so each one keeps its own job.
If precise macro coaching is not something you need, PepLabo can cover the whole routine on its own. Barcode logging is free, and Pro estimates meals from a photo, your voice or a restaurant menu, next to the doses of the same day.
Bottom line: pair them when nutrition is its own project; switch fully when the injection routine is the project.
Overall
MacroFactor is a thoughtful macro tracker with an adaptive coach, a verified food database and a non-judgemental tone [1], and it suits people whose plan is written in calories. PepLabo is the better choice when the routine itself needs managing: peptides or GLP-1 medicines, vials to mix and track, sites to rotate, cycles with breaks and reminders that notice a missed dose. It keeps all of that in one private app, and the core costs nothing.
Trademarks and sources
MacroFactor is a trademark of Stronger By Science Technologies LLC. PepLabo has no affiliation with Stronger By Science Technologies LLC. Everything said here about MacroFactor comes from its public App Store listing, Google Play page and website, read on 20 October 2026, and may have changed since. “Not mentioned in the sources we read” means we could not confirm a feature there, not that the app lacks it.
