Comparison

NextDose.AI vs PepLog

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

Head to head
About

NextDose.AI

Track GLP-1s, TRT, peptides, and other compounds with an AI that analyzes your logged data. Monitor weight loss, hormone levels, and bloodwork with research-backed context. Features include vial scanning, dose calculators, and health integrations.

Highlights
  • Weight & GLP-1 Progress Tracking
  • Testosterone & TRT Monitoring
  • Bloodwork Analysis & Charting
  • AI Research Assistant
  • Estimated Pharmacokinetic Curves
  • AI Vial Scanner
  • Syringe & Reconstitution Calculator
Features
Read full description

Track your testosterone, weight loss, GLP-1s, peptides, and any compound, all in one simple app, with an AI that works from your real logged data. NextDose.AI is the all-in-one tracker for anyone running peptides, GLP-1s (semaglutide, tirzepatide), testosterone/ TRT therapy, or any research compound. Scan your vial, snap your bloodwork, and log every shot. Then watch your estimated pharmacokinetic curves update throughout the day. LOSING WEIGHT ON A GLP-1? Log your weekly shot, track your weight, and watch your progress week by week and month by month. Simple and clear, so you always know where you stand and where you're headed. TRACKING TESTOSTERONE OR TRT? Log your protocol and watch your total testosterone, free testosterone, estradiol, and full panel charted over time, right next to your doses. See how your levels move as your protocol changes. YOUR BLOODWORK, MADE CLEAR Snap any lab or blood test and NextDose transcribes your values, charts every marker over time, and flags what's above or below standard reference ranges with plain-language, research-cited context. It organizes and tracks your numbers. It does not diagnose. AN AI BUILT AROUND YOUR STACK This isn't a notes app with a calendar. NextDose's research assistant draws on your logged data plus a large library of peer-reviewed studies. Ask about dosing windows, half-lives, or how compounds interact, and it surfaces the relevant research next to your own numbers. It always cites the research, never prescribes a dose, and points you back to your physician. KEY FEATURES • Weight & GLP-1 Progress. Log your weekly shot, track your weight and body composition, and chart your progress over time. • Testosterone & TRT Tracking. Chart testosterone, estradiol, and your full hormone panel against your protocol. • Bloodwork Analysis & Charting. Snap any lab, auto-transcribe your values, and trend every marker with above and below range flags and research context. • Agentic AI Research Assistant. Grounded in your data and a large peer-reviewed research library. • Estimated Pharmacokinetic Curves. Modeled rise, peak, and clearance for every logged dose, hour by hour. • AI Vial Scanner. Point your camera and the strength and concentration auto-fill. • 100+ Compound Library. Peptides, GLP-1s, TRT, and popular performance compounds, with linked research. • Syringe & Reconstitution Calculator. Enter your concentration and target dose and it converts to syringe units. No math. • Interaction Notes. Surfaces documented interactions reported in the research for compounds you've logged. • Apple Health Sync. Weight, body fat, heart rate, HRV, and sleep. • Recovery Readiness. A daily score blending HRV, resting heart rate, and sleep trends. • Injection Site Rotation. A visual body map tracks your injection history and rotation points. • Morning Briefing. A daily AI summary of your logged doses, trends, and today's schedule. WHO IT'S FOR GLP-1 users tracking weight loss and metabolic progress. Peptide users tracking recovery and longevity. TRT patients tracking testosterone and ancillaries. Athletes and biohackers tracking performance and lab trends. YOUR DATA, YOUR CONTROL Encrypted and private. We never sell your data. Apple Health stays on-device unless you sync. Cancel and delete anytime. NEXTDOSE PREMIUM NextDose Premium unlocks every feature. The annual plan includes a 7-day free trial and is offered at a discount; a monthly option is also available. Subscriptions auto-renew unless canceled at least 24 hours before the current period ends, and you can manage or cancel anytime in your Apple ID settings. NextDose.AI is an educational compound tracker for adults 18+. It is not medical advice and not a substitute for a qualified healthcare professional. We do not sell, prescribe, recommend, or diagnose any compound or lab result. Always consult your physician. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

PepLog

This app helps users manage peptide protocols by providing a private, on-device logbook. Quickly record doses, track vial usage, monitor consistency with streaks and history, and log weight over time. It also includes a unit converter for precise measurements.

Highlights
  • Log doses in seconds
  • Track vial contents and remaining amounts
  • Monitor logging consistency and history
  • Chart weight over time with goals
  • Unit converter for syringe measurements
  • Private, on-device data storage
Features
Read full description

PepLog is a medication reminder & logbook for people who manage a peptide protocol and want to keep track of their progress & history. It's built around one idea: recording a dose should take seconds, right when it happens, the way a food tracker works. WHAT YOU CAN DO • Log a dose in a couple of taps: amount, time, injection site, and a note • Reconstitution made clear: enter a vial's contents and the water you added, and PepLog derives the concentration and converts the dose amount you enter into syringe units • Track your vials: see how much you have left as you log, when each vial was mixed, how long ago, and what 1 mg measures in it. Finished vials remain in your history • Progress photos: capture on a repeatable angle, compare any two side by side, and watch your timeline build over months • See what you've invested: record what a vial cost and PepLog shows your real spend, your cost per logged dose, and how much of what you mixed you've used • Set reminders on your own schedule, with multiple times a day, and log or snooze straight from the notification • See your consistency: a logging streak, badges, a week view, and a history of everything you've recorded • Track your weight and hydration over time, with your own optional goals NEW IN 1.4.2 - A fresh turquoise design throughout PepLog, with light and dark mode, an updated app icon, and refreshed logos. - Tap the sun or moon next to your profile to switch themes, or tap your profile to open Settings directly. - Vial details show when you mixed, time since mixing, and what 1 mg measures in syringe units. - Stats now defaults to 30 days with a cleaner layout. - Additional injection-site choices include left and right waist and lat, and Sign in with Apple reliability has been improved. PEPLOG PRO PepLog is a subscription app. Choose a yearly plan with a 3-day free trial for eligible subscribers, or a monthly plan with no trial. Prices are always shown in the app before any purchase, payment is handled by Apple, and you can cancel anytime in your App Store settings. Installed before version 1.2? Your access stays as it was. PepLog is a logging and measurement tool. It does not provide medical advice, dosing recommendations, or treatment guidance, and it does not recommend or endorse any substance. Always consult a qualified healthcare provider before starting, stopping, or changing any regimen. For adults 18+. Questions or feedback? Contact support@trypeplog.com. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

NextDose.AI4 screens
PepLog4 screens

Verdict

The call

The clearest difference is rating: NextDose.AI at 5.0 against PepLog's 4.4. NextDose.AI also leads on update cadence (every 2 days vs every 2 weeks). PepLog's advantage is monetization model (free vs free with in-app purchases). On price, review sentiment, ratings volume and ads 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

NextDose.AI holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 9 and 25 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

NextDose.AI ships an update every 2 days, PepLog every 2 weeks. The most recent releases landed on October 1, 2026 and October 8, 2026 respectively.

Scorecard3 real differences · 7 level
NextDose.AI versus PepLog: the parameters behind the verdict, then further details
ParameterNextDose.AIPepLog
PriceFreeFree
Rating5.0 (9 ratings) — better4.4 (25 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings925 — better
Update frequencyEvery 2 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFree with in-app purchasesFree — better
DevicesiPhoneiPhone, iPad — better
Requires iOS17.017.0
Further details — not scored
Size51 MB28 MB
Age rating17+17+
DeveloperNextDose.AI Inc.Moises Olivares

Customer experience

NextDose.AI

All ratings9 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews8 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

PepLog

All ratings25 ratings
Positive84.0%
Neutral0.0%
Negative16.0%
Written reviews6 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

NextDose.AI

No in-app purchases

None

PepLog

No in-app purchases

Questions

Is NextDose.AI free?
NextDose.AI is free to download, with no in-app purchases.
Is PepLog free?
PepLog is free to download, with no in-app purchases.
Which has better reviews, NextDose.AI or PepLog?
NextDose.AI is rated higher. NextDose.AI averages 5.0 out of 5 from 9 ratings, while PepLog averages 4.4 from 25 ratings.
Do NextDose.AI or PepLog have ads?
Neither NextDose.AI nor PepLog shows ads.
Which is updated more often, NextDose.AI or PepLog?
NextDose.AI ships an update every 2 days, and PepLog every 2 weeks. Most recently, NextDose.AI was updated on October 1, 2026 and PepLog on October 8, 2026.

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