Comparison

Milligram vs RetaPro

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Milligram

Optimize your health and performance with science-backed data. Track peptide levels, analyze bloodwork, and monitor progress with intelligent insights. Get personalized feedback on your protocol and health metrics.

Highlights
  • Intelligent protocol analysis
  • Compound level tracking
  • Bloodwork analysis and biomarker flagging
  • Comprehensive compound library
  • Progress scans for body composition
  • Stack analytics and interaction flagging
  • Journaling for health metrics
  • Reconstitution calculator
Features
Read full description

Whether you're optimizing for fat loss, muscle gain, longevity, recovery or anti aging, Milligram is for people who want to take back control of their health protocols with science-backed confidence. Every other tracker gives you a tidier place to write down what you already did. Milligram models what is actually in your system right now. Every dose charted against every half-life. Everything in the stack with info and the database covering over 3,581 references total. Bloodwork read against what you are actually running. And an AI assistant that answers from your real-time numbers, read against a database made specifically for your protocol, not everyday questions. FEATURES Your Protocol: Everything you run, on one screen. Each compound with its own schedule, dose, vial and supply tracked, and the whole protocol read as one picture rather than being scattered across different notes, files and spreadsheets. Dose tracking: Log every dose, whether that's an injectable or an oral supplement - Milligram works with every compound and every dosing route. Reminders arrive on the protocol's schedule and know which compound, which dose and which injection site. Milligram Intelligence: An assistant that already has your stack, your doses, your bloodwork and your Apple Health data loaded. Ask "which doses did I miss this month", "how is my weight tracking against my retatrutide cycle", or "did my IGF-1 move on tesamorelin", and get an answer from your own numbers. Level Buildup: See your compound levels build from each trough to peak. Every dose is charted against the published half-life of your compound, so you know exactly when you've reached the right zone at the right titration, how each dose is keeping you there, and how much a missed dose can actually move the needle. Bloodwork: Upload a PDF or a photo of your labs. Every biomarker is extracted and out-of-range values flagged, then kept where they can be read against the compounds that might be moving them. Compound Library: 202 compounds with mechanisms, dose ranges, half-lives, expected timelines and side-effect profiles, each referenced to clinical sources. Retatrutide, tirzepatide and semaglutide. Testosterone esters, Masteron, Anavar. Tesamorelin, BPC-157, GHK-Cu, MK-677, Ipamorelin and CJC-1295. Creatine, Omega-3 Fish Oil, Magnesium, Zinc, Vitamin D3, and more. AI calorie and nutrition tracking: Scan any meal with your camera. Snap a photo, scan a barcode, or scan a nutrition label and Milligram extracts calories, protein, carbs and fat instantly. Track every meal against your daily targets with a clean macro breakdown. Apple Health: Two-way sync for sleep, HRV, vitals, activity, weight and body composition, so protocol data and health data sit in the same timeline. SUBSCRIPTION AND TERMS Milligram Pro is accessible via an auto-renewing subscription. You may switch off auto-renew in your Apple ID Account Settings. Purchases of subscriptions will be charged using your Apple ID upon confirmation of purchase. Subscriptions renew on a monthly or yearly basis, unless canceled at least 24 hours before the end of the current period. If canceled, subscriptions remain valid until the end of the current period, and any unused portions are not valid for a refund. By signing in with Apple or by purchasing a subscription, you affirm your understanding of the following: Terms of Service: https://milligram.health/terms Privacy Policy: https://milligram.health/privacy Milligram is not a medical device and is not intended to diagnose, treat, cure, monitor, or prevent medical conditions or illnesses. Always consult your physician first. All information provided is for general informational purposes only.

About

RetaPro

This app helps users meticulously track their retatrutide treatment. It logs doses, manages vials, calculates reconstitutions, and monitors progress with features like meal logging and weight tracking. Smart reminders ensure no dose is missed.

Highlights
  • Retatrutide dose logging
  • Vial volume monitoring
  • Reconstitution calculation
  • Protocol and cycle tracking
  • Personalized meal logging
  • Weight and progress photo tracking
  • Smart injection reminders
Features
Read full description

RetaPro: Your Retatrutide Companion The most complete tracker built exclusively for retatrutide. Log every dose, monitor your vials, calculate reconstitution, and stay on top of your full retatrutide protocol — all in one place. Retatrutide Dose Log & Injection Tracker Log every retatrutide injection with a single tap. Track your dose amount, injection site rotation, and the vial you're drawing from. RetaPro keeps a complete injection log so you always know when your last dose was, how much remains in each vial, and where you injected last. Reconstitution & Vial Calculator Take the guesswork out of retatrutide preparation. RetaPro's built-in peptide calculator helps you calculate reconstitution volumes, BAC water ratios, and exact dose per syringe draw — so every injection is precise. Retatrutide Cycle & Protocol Tracker Track your complete retatrutide protocol over time. Set cycle start dates, log dose escalations, and review your full injection history at a glance. Built for precision, not guesswork. Log Meals Your Way Food logging built for retatrutide users. Search a vast food database, scan barcodes, photograph your plate, or describe your meal by voice. Your daily protein, fiber, water, and calorie targets are calculated specifically for you — based on your body stats, activity level, and treatment plan. Monitor Your Weight & Body Composition Add weight entries manually or sync with Apple Health. Track your trend over time with clear charts, monitor your BMI, and see exactly how your body is responding to your retatrutide treatment. Progress Photos Capture your transformation with in-app progress photos. Compare before and after side-by-side and see the changes your scale doesn't fully capture. Smart Injection Reminders Never miss a dose. RetaPro sends smart reminders when your next retatrutide injection is due, based on your personal dosing schedule. Also get nudges for meals, hydration, and activity. Home Screen Widgets Track your injection status, daily protein, water, and steps without opening the app. Widgets for iOS keep your retatrutide schedule visible at a glance. Key Features - Retatrutide dose log with injection site rotation tracking - Vial tracker: monitor remaining volume across multiple vials - Reconstitution calculator (BAC water, mcg/mg, exact syringe draw) - Retatrutide cycle tracker with full dose history and protocol timeline - Meal logging via search, barcode scan, AI photo recognition, and voice - Personalized protein, fiber, water, and calorie targets - Weight trend charts with BMI tracking - Progress photo timeline with side-by-side comparison - Apple Health integration - Home screen widgets for iOS - Full offline support - Available in 40+ languages RetaPro is a personal tracking tool and is not a medical device. Always follow your healthcare provider's guidance regarding your treatment. Apple Terms of Use Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Milligram4 screens
RetaPro4 screens

Verdict

The call

The clearest difference is update cadence: Milligram at every 5 days against RetaPro's every 2 months. Milligram also leads on review sentiment (58% vs 40%) and ratings volume (430 vs 45). RetaPro's advantage is iOS requirement (15.5 vs 17.0). On price, rating, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Milligram sells 3 in-app purchases, starting at $17.49 per month and RetaPro sells 2 in-app purchases, starting at $39.99 per year. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for Milligram against 4.6 for RetaPro. That said, the two scores are not equally well evidenced: Milligram has 430 ratings behind it against 45, so its average is the more settled of the two. Written reviews are what separate them: 58% of Milligram's written reviews are positive against 40% of RetaPro's.

UpkeepUpdate frequency

Milligram ships an update every 5 days, RetaPro every 2 months. Both last shipped on October 25, 2026.

Scorecard4 real differences · 6 level
Milligram versus RetaPro: the parameters behind the verdict, then further details
ParameterMilligramRetaPro
PriceFreeFree
Rating4.7 (430 ratings) — better4.6 (45 ratings)
Positive reviews58.5% of reviews — better40.0% of reviews
Number of ratings430 — better45
Update frequencyEvery 5 days — betterEvery 2 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, Apple WatchiPhone, iPad, iPod — better
Requires iOS17.015.5 — better
Further details — not scored
Size171 MB103 MB
Age rating12+17+
DeveloperMilligram Health Pty LtdAgora Labs Ltda.

Customer experience

Milligram

All ratings419 ratings
Positive92.4%
Neutral3.3%
Negative4.3%
Written reviews65 reviews
Positive58.5%
Neutral1.5%
Negative40.0%

RetaPro

All ratings45 ratings
Positive86.7%
Neutral8.9%
Negative4.4%
Written reviews5 reviews
Positive40.0%
Neutral0.0%
Negative60.0%

In-app purchases

3 purchases

Milligram

Subscriptions3
  • Milligram Pro2 variants$17.491 Month
  • Milligram Pro3 Days trial$49.991 Year
  • Milligram Pro3 Days trial$69.991 Year
2 purchases

RetaPro

Subscriptions1
  • Yearly Plan$39.991 Year
One-time1
  • Lifetime Plan$39.99

Questions

Is Milligram free?
Milligram is free to download, with in-app purchases available.
Is RetaPro free?
RetaPro is free to download, with in-app purchases available.
Which has better reviews, Milligram or RetaPro?
Milligram is rated higher. Milligram averages 4.7 out of 5 from 430 ratings, while RetaPro averages 4.6 from 45 ratings.
Do Milligram or RetaPro have ads?
Neither Milligram nor RetaPro shows ads.
Which is updated more often, Milligram or RetaPro?
Milligram ships an update every 5 days, and RetaPro every 2 months. Most recently, Milligram was updated on October 25, 2026 and RetaPro on October 25, 2026.

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