Comparison

12 Challenges vs PepstackAI

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

Head to head
About

12 Challenges

Features
Read full description

12 Challenges turns any goal into a focused 30-day challenge. Pick something you want to do, commit for a month, and tap once a day to track it. At the end, you get a clear result (achieved, perfect, or ended) and decide whether to continue or start a new challenge. ONE CHALLENGE. ONE MONTH. ONE TAP A DAY. Choose something that matters to you: working out, reading, quitting sugar, saving money, meditating, anything. Start your challenge and check it off every day it's due. No streak anxiety, no all-or-nothing pressure: even if a day slips, the month still gives you an honest result. SEE YOUR PROGRESS AT A GLANCE Track a single challenge on a path calendar, or follow several at once in a grid overview. Your streak is always visible, right where you need it. REMINDERS & WIDGETS Get a daily reminder at a time you pick, and check off your challenge straight from the Home Screen or Control Center widget, no need to open the app. NO EXCEPTIONS MODE Want zero excuses? No Exceptions Mode raises the bar to 100%: one confirmed missed day ends the challenge right away. MONTHLY REVIEW Every challenge closes with a short recap: days completed, longest streak, final status. Always there to look back on in your archive. ACHIEVEMENTS Unlock 30 badges for milestones like your first perfect month, a comeback after a missed day, or three challenges completed in a row. Five of them stay secret until you earn them. Optional Pro upgrade: Apple Watch app, statistics view, and full challenge history. No account, no ads, no tracking. Core tracking is free. Terms of Use (EULA): 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

12 Challenges4 screens
PepstackAI4 screens

Verdict

The call

The clearest difference is update cadence: 12 Challenges at every 2 days against PepstackAI's every 11 days. PepstackAI's advantage is iOS requirement (15.0 vs 18.0). 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. 12 Challenges sells 2 one-off in-app purchases 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

12 Challenges ships an update every 2 days, PepstackAI every 11 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
12 Challenges versus PepstackAI: the parameters behind the verdict, then further details
Parameter12 ChallengesPepstackAI
PriceFreeFree
Rating—5.0 (3 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—3 — better
Update frequencyEvery 2 days — betterEvery 11 days
AdsNoNo
In-app purchasesYesYes
Monetization—Freemium
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPod
Requires iOS18.015.0 — better
Further details — not scored
Size13 MB18 MB
Age rating4+17+
DeveloperYannes JabbouryDeepak Kumar

In-app purchases

2 purchases

12 Challenges

One-time2
  • Standard Pro$4.99
  • Supporter Pro$8.99
2 purchases

PepstackAI

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

Questions

Is 12 Challenges free?
12 Challenges is free to download, with in-app purchases available.
Is PepstackAI free?
PepstackAI is free to download, with in-app purchases available.
Do 12 Challenges or PepstackAI have ads?
Neither 12 Challenges nor PepstackAI shows ads.
Which is updated more often, 12 Challenges or PepstackAI?
12 Challenges ships an update every 2 days, and PepstackAI every 11 days. Most recently, 12 Challenges was updated on November 5, 2026 and PepstackAI on October 31, 2026.

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