Comparison

Peptide Tracker by Peptide AI vs Fit Flex Pass

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

Head to head
About

Peptide Tracker by Peptide AI

Log peptide and GLP-1 doses, track vial levels, and rotate injection sites. An AI coach analyzes your data, suggests experiments, and provides research-backed answers. Sync with wearables and export your history for your clinician.

Highlights
  • Dose logging
  • Vial level tracking
  • Injection site rotation
  • AI coaching
  • Wearable sync
  • Data export
  • Community rooms
Features
Read full description

Peptide AI is a peptide and GLP-1 tracker with an AI coach that reads your own logs. Log every dose in two taps, get reminded when it's due, and rotate injection sites on a 20-site body map, front and back. Track what's left in each vial, pen or pill bottle and get a nudge before you run low. Built for real protocols: BPC-157, TB-500, GHK-Cu, CJC-1295, Ipamorelin, GLP-1s like semaglutide, tirzepatide and retatrutide, and 55+ more compounds and blends. REMI, YOUR COACH — Ask about your own data and get answers backed by cited research. Remi reads your meals next to your doses, suggests short experiments and tells you whether they worked. TRACK — Daily check-ins, side effects after each dose, weight in lb or kg, goals and trends. Connect Apple Health, Oura, WHOOP, Garmin or Fitbit for sleep, HRV and recovery. COMMUNITY — Rooms for the compounds people run, and a weekly leaderboard with friends. EXPORT — A PDF of your dose history and health metrics to bring to your clinician. WIDGETS & WATCH — Log your next dose from a Home Screen or Lock Screen widget, or from Apple Watch. Logging doses and tracking your protocol are free. Remi, wearable sync, PDF export and some Track insights need a subscription. Peptide AI is for tracking and education only. It doesn't give medical advice or tell you how much to take: your dose comes from your clinician. Consult a licensed clinician before starting or changing any protocol. Terms of Use: https://peptideai.co/terms Privacy Policy: https://peptideai.co/privacy

About

Fit Flex Pass

Access independent gyms and book personal trainers without long-term commitments. Purchase one-time passes for day, week, or month access, or book single or pack sessions with trainers. Your account works nationwide, offering flexibility for travel.

Highlights
  • Buy gym day, week, or month passes
  • Book sessions with personal trainers
  • One-time purchases, no renewals
  • Nationwide account access for travel
  • QR code for gym check-in
  • Discounted trainer session packs
Features
Read full description

Fit Flex Pass is the simplest way to work out on your own terms. Buy a day, week, or month pass at an independent gym near you, or book sessions with an independent personal trainer. Every purchase is one-time. Nothing renews. Nothing to cancel. HOW IT WORKS Find a gym or trainer on the map, buy a pass in a couple of taps, and your QR code is active immediately. Show it at the front desk, they scan it, you're in. GYM PASSES Day, week, and month passes at independent gyms. Day passes expire at midnight. Week and month passes start counting from your first check-in. PERSONAL TRAINERS Book a single session or a discounted 5- or 10-session pack with an independent coach. No gym membership required. Packs run down as you use them rather than expiring on a clock. TRAVELING Your account works at every gym in the network, so a trip doesn't mean losing a week of training or paying for a membership you won't use. FOR GYM OWNERS AND TRAINERS List for free and keep 85% of every pass sold. Scan member passes, manage pricing, and track earnings and payouts from the same app. Fit Flex Pass is a marketplace. Gyms and trainers are independent businesses responsible for their own facilities and services.

Screenshots

Peptide Tracker by Peptide AI4 screens
Fit Flex Pass4 screens

Verdict

The call

The clearest difference is rating: Fit Flex Pass at 5.0 against Peptide Tracker by Peptide AI's 4.5. Fit Flex Pass also leads on in-app purchases (none vs 4) and iOS requirement (15.1 vs 18.0). Peptide Tracker by Peptide AI's advantage is ratings volume (75 vs 2) and update cadence (weekly vs every 2 weeks). On price, ads 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. Peptide Tracker by Peptide AI sells 4 in-app purchases, starting at $6.99 per 7 days. Fit Flex Pass asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Fit Flex Pass holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Peptide Tracker by Peptide AI has 75 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Peptide Tracker by Peptide AI ships an update weekly, Fit Flex Pass every 2 weeks. Both last shipped on October 31, 2026.

Scorecard6 real differences · 4 level
Peptide Tracker by Peptide AI versus Fit Flex Pass: the parameters behind the verdict, then further details
ParameterPeptide Tracker by Peptide AIFit Flex Pass
PriceFreeFree
Rating4.5 (75 ratings)5.0 (2 ratings) — better
Positive reviews76.5% of reviews—
Number of ratings75 — better2
Update frequencyWeekly — betterEvery 2 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS18.015.1 — better
Further details — not scored
Size72 MB46 MB
Age rating17+4+
DeveloperPeptide AIAnthony Idi

Customer experience

Peptide Tracker by Peptide AI

All ratings75 ratings
Positive84.0%
Neutral6.7%
Negative9.3%
Written reviews17 reviews
Positive76.5%
Neutral5.9%
Negative17.6%

Fit Flex Pass

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

4 purchases

Peptide Tracker by Peptide AI

Subscriptions4
  • Premium Weekly$6.997 Days
  • Premium Monthly7 Days trial$14.991 Month
  • Premium Yearly Offer7 Days trial$29.991 Year
Show 1 more
  • Premium Yearly7 Days trial$59.991 Year
None

Fit Flex Pass

No in-app purchases

Questions

Is Peptide Tracker by Peptide AI free?
Peptide Tracker by Peptide AI is free to download, with in-app purchases available.
Is Fit Flex Pass free?
Fit Flex Pass is free to download, with no in-app purchases.
Which has better reviews, Peptide Tracker by Peptide AI or Fit Flex Pass?
Fit Flex Pass is rated higher. Peptide Tracker by Peptide AI averages 4.5 out of 5 from 75 ratings, while Fit Flex Pass averages 5.0 from 2 ratings.
Do Peptide Tracker by Peptide AI or Fit Flex Pass have ads?
Neither Peptide Tracker by Peptide AI nor Fit Flex Pass shows ads.
Which is updated more often, Peptide Tracker by Peptide AI or Fit Flex Pass?
Peptide Tracker by Peptide AI ships an update weekly, and Fit Flex Pass every 2 weeks. Most recently, Peptide Tracker by Peptide AI was updated on October 31, 2026 and Fit Flex Pass on October 31, 2026.

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