reactimer vs PepstackAI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
reactimer
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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/
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.
- Personalized supplement recommendations
- Routine-based scheduling
- Conflict flagging for supplements
- Research-backed product information
- Peptide reference library
- Intake logging and data export
- Offline functionality
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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
Verdict
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
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.
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.
| Parameter | reactimer | PepstackAI |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (3 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 3 — better |
| Update frequency | Every 4 weeks | Every 11 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 18.5 | 15.0 — better |
| Further details — not scored | ||
| Size | 23 MB | 18 MB |
| Age rating | 4+ | 17+ |
| Developer | Yuriy Nosenko | Deepak Kumar |
In-app purchases
reactimer
- Premium Subscription$12.991 Year
PepstackAI
- Pepstack Pro (Monthly)$4.991 Month
- Pepstack Pro (Yearly)$49.991 Year









