Comparison

reactimer vs PepstackAI

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

Head to head
About

reactimer

Features
Read full description

Create personalized interval timer with randomly placed configurable signals to train your reaction, reflexes, skills in general. Train your body and your brain. Ideal for martial arts, racket sports, and much more... Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

PepstackAI

This app helps you manage your supplement intake based on your personal routine and health goals. It provides personalized recommendations with research-backed reasoning and schedules them around your daily activities, avoiding potential conflicts.

Highlights
  • Personalized supplement recommendations
  • Routine-based scheduling
  • Conflict flagging for supplements
  • Research-backed product information
  • Peptide reference library
  • Intake logging and data export
  • Offline functionality
Features
Read full description

Pepstack helps you take the right supplements at the right time, built around your real routine, not a generic label. HOW IT WORKS Tell Pepstack your goals, your diet, and anything that's bothered you before. It builds a personalized shortlist from a catalog of real, sourced products, every pick shows the reason it was chosen, whether that's your goal, your diet, or a reaction you flagged. YOUR SCHEDULE, NOT A GENERIC ONE Add anything to your daily schedule and Pepstack places it around your actual day, your meals, your sleep window, instead of just a flat list of times. Known timing conflicts (like zinc and iron needing space between them) are flagged before they become a problem. BUILT ON REAL RESEARCH Every product in the catalog links back to real, verifiable research citations, not marketing copy. Ask a question and get an answer sourced from that same catalog, with a way to report anything that looks wrong. A REFERENCE LIBRARY, NOT A DOSING TOOL Pepstack also includes a peptide reference library for research purposes: what each one is, its general category, and research trends. It does not provide doses, protocols, or injection guidance for peptides. TRACK WHAT YOU ACTUALLY TAKE Log what you've taken, see your streak, and export your own data whenever you want. Your account and everything in it can be deleted at any time, right from the app. Pepstack works offline for your day-to-day tracking and syncs when you're back online. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.pepstack.fit/privacy.html

Screenshots

reactimer4 screens
PepstackAI4 screens

Verdict

The call

The clearest difference is ads: PepstackAI at none against reactimer's shown. PepstackAI also leads on update cadence (every 11 days vs every 4 weeks) and iOS requirement (15.0 vs 18.5). On price, 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. reactimer sells 1 in-app purchase, starting at $12.99 per year and PepstackAI sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

reactimer ships an update every 4 weeks, PepstackAI every 11 days. The most recent releases landed on October 10, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level
reactimer versus PepstackAI: the parameters behind the verdict, then further details
ParameterreactimerPepstackAI
PriceFreeFree
Rating—5.0 (3 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—3 — better
Update frequencyEvery 4 weeksEvery 11 days — better
AdsYesNo — better
In-app purchasesYesYes
Monetization—Freemium
DevicesiPhone, iPadiPhone, iPod
Requires iOS18.515.0 — better
Further details — not scored
Size23 MB18 MB
Age rating4+17+
DeveloperYuriy NosenkoDeepak Kumar

In-app purchases

1 purchases

reactimer

Subscriptions1
  • Premium Subscription$12.991 Year
2 purchases

PepstackAI

Subscriptions2
  • Pepstack Pro (Monthly)$4.991 Month
  • Pepstack Pro (Yearly)$49.991 Year

Questions

Is reactimer free?
reactimer is free to download, with in-app purchases available.
Is PepstackAI free?
PepstackAI is free to download, with in-app purchases available.
Do reactimer or PepstackAI have ads?
reactimer shows ads; PepstackAI does not.
Which is updated more often, reactimer or PepstackAI?
reactimer ships an update every 4 weeks, and PepstackAI every 11 days. Most recently, reactimer was updated on October 10, 2026 and PepstackAI on October 31, 2026.

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