Comparison

Peptara vs Stackr

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

Head to head
About

Peptara

Features
Read full description

Keep a clinician-directed protocol clear enough to follow and review. Peptara brings the plan, scheduled items, completed records, optional site history, vial inventory and outcome check-ins into one on-device tracker for iPhone and iPad. RECORD THE PLAN YOU WERE GIVEN • Copy the compound label, amount, unit, route, time and cycle rhythm from your clinician, prescription or pharmacy label • Start from a blank record—Peptara supplies no compounds, doses or schedules • Keep the current plan separate from completed history • Use reminders based on the schedule you entered LOG WHAT ACTUALLY HAPPENED • Match each completion to the same plan, label and day • Prevent duplicate quick logs for a scheduled item • Record an optional clinician-approved site without Peptara choosing one • Add notes and symptom labels for later review PREPARE A CLEANER CLINICIAN REVIEW • View seven-day adherence based on matched records • Track weight, sleep, mood, strength, hydration, appetite and other outcomes you choose • Compare observed records without causal or treatment claims • Share a readable local summary only when you choose a destination in Apple’s share sheet KEEP INVENTORY ORGANISED • Record vial concentration, volume, dose unit and your own reorder threshold • Use Apple Vision on device to read label text • Enter and verify every numeric value yourself—OCR never derives a dose, concentration or volume • See remaining-dose estimates only when the units you entered are compatible ON-DEVICE PRIVACY • Protocol, dose, outcome, symptom, site, note, photo and Apple Health content stays on your device • No account is required for core tracking • Export and restore an unencrypted portable JSON backup through Apple’s document picker • Face ID or device-passcode lock is opt-in • Product analytics is off unless you opt in and excludes all health-adjacent content CORE TRACKING IS FREE Use one active plan and one vial record with core logging, outcomes and clinician-review sharing. PEPTARA PRO Pro adds unlimited active plans, unlimited supply records, a 30-day completed-record review and advanced observed outcome trends. Monthly and annual plans renew automatically unless cancelled in App Store settings. MEDICAL BOUNDARY Peptara records instructions you enter. It does not recommend compounds, doses, schedules, injection placement or technique; diagnose; prescribe; or treat. Always follow a doctor, qualified clinician, prescription or pharmacy label. Privacy: https://peptara-prod.web.app/privacy Support: https://peptara-prod.web.app/support Terms: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Stackr

This app simplifies tracking peptide and GLP-1 doses, including supplies like vials and pens. It offers smart reminders, home screen widgets, and visual charts of estimated active levels based on half-life. Designed for users managing peptide protocols, it keeps your dosing information organized and accessible.

Highlights
  • Log peptide and GLP-1 doses
  • Track vials, pens, and other supplies
  • Smart reminders for next doses
  • Home screen widgets
  • Estimated active level charts
  • Multi-peptide stack tracking
  • Reference pages for common compounds
Features
Read full description

Stackr is the all-in-one tracker for your peptide and GLP-1 protocol. Every dose, vial and meal in one place, with the math done for you. KEY FEATURES • Dose tracking and reminders Log a dose in seconds from your Home screen. Run daily, weekly, every-few-days or specific-day schedules, and several protocols at once. Reminders make sure you never miss a dose, and Home Screen widgets show what's next. • Dose calculator Enter your vial strength, water and dose, and see exactly how many units to draw on a U-100 or U-40 syringe. Works in mcg, mg, IU and units. • Supplies and vials Track vials, pens and other supplies. Stackr counts down what's left every time you log and warns you before you run out. • Progress Keep your weight, progress photos and dose history together, with a calendar of taken and missed doses and estimated active levels from your logs. • Food and calories Snap a meal, scan a barcode, search a food or just say what you ate. Stackr tracks calories and protein against your daily plan. • Stackr Coach Ask the AI coach questions about your routine and your meals, any time. • Learn Reference pages for semaglutide, tirzepatide, retatrutide, BPC-157, TB-500, GHK-Cu and 100+ more, with research status and sources. WHY STACKR • Built for GLP-1s and peptides, from one weekly shot to a full stack • Pounds or kilograms, mcg or mg, U-100 or U-40 • Syncs across your devices when you sign in • Message the team directly from Settings Stackr is a personal tracking and educational app. It does not give medical advice, prescribe treatments or tell you which peptide, dose or schedule is right for you. Always talk to a qualified healthcare professional. Active levels and photo-based nutrition values are estimates. SUBSCRIPTION Stackr is free to download. Full access requires a paid Stackr+ subscription. Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel your subscription in your Apple Account settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://getstackr.app/privacy

Screenshots

Peptara4 screens
Stackr4 screens

Verdict

The call

The clearest difference is update cadence: Stackr at every 4 days against Peptara's every 3 months. On price, ads, in-app purchases and device support 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. Peptara sells 2 in-app purchases, starting at $7.99 per month and Stackr sells 7 in-app purchases, starting at $7.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Peptara ships an update every 3 months, Stackr every 4 days. The most recent releases landed on October 2, 2026 and October 18, 2026 respectively.

Scorecard1 real difference · 9 level
Peptara versus Stackr: the parameters behind the verdict, then further details
ParameterPeptaraStackr
PriceFreeFree
Rating—4.4 (174 ratings) — better
Positive reviews—66.7% of reviews
Number of ratings—174 — better
Update frequencyEvery 3 monthsEvery 4 days — better
AdsNoNo
In-app purchasesYesYes
Monetization—Freemium
DevicesiPhone, iPad — betteriPhone
Requires iOS17.017.0
Further details — not scored
Size10 MB88 MB
Age rating17+12+
DeveloperBILLY PAUL MASONStackr Holdings LLC

In-app purchases

2 purchases

Peptara

Subscriptions2
  • Peptara Pro$7.991 Month
  • Peptara Pro$59.991 Year
7 purchases

Stackr

Subscriptions7
  • Stackr+ Weekly$7.997 Days
  • Monthly$12.991 Month
  • Stackr+ Yearly$29.991 Year
Show 4 more
  • Stackr+ Yearly$49.991 Year
  • Stackr+ Yearly3 Days trial$49.991 Year
  • Stackr+ Yearly$59.991 Year
  • Yearly3 Days trial$69.991 Year

Questions

Is Peptara free?
Peptara is free to download, with in-app purchases available.
Is Stackr free?
Stackr is free to download, with in-app purchases available.
Do Peptara or Stackr have ads?
Neither Peptara nor Stackr shows ads.
Which is updated more often, Peptara or Stackr?
Peptara ships an update every 3 months, and Stackr every 4 days. Most recently, Peptara was updated on October 2, 2026 and Stackr on October 18, 2026.

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