K2 Sim vs SubTrack
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
K2 Sim
Explore market charts and study trading ideas with historical data. Analyze price action and strategy behavior over time to learn how patterns have performed. This tool is for educational and research purposes only, not for live trading or financial advice.
- Explore market charts
- Study trading ideas
- Use historical market data
- View price action
- Review strategy behavior
- Learn pattern performance
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K2 helps you explore market charts and study trading ideas using historical market data. Select a ticker and date to view price action, review strategy behavior over time, and learn how patterns have played out. K2 is for educational and research purposes only, it does not execute trades and does not provide personalized financial advice.
SubTrack
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SubTrack is the subscription tracker that helps you track subscriptions, renewals, and trial periods in one simple app. Never miss a renewal or forget to cancel a free trial. MAIN FEATURES COMPREHENSIVE SUBSCRIPTION TRACKING Track streaming services like Netflix, Disney Plus, Apple TV Plus, HBO Max, Paramount Plus, Hulu, music services like Spotify, Apple Music, YouTube Music, Tidal, cloud storage like iCloud, Dropbox, Google Drive, education platforms like Coursera, Skillshare, Duolingo, MasterClass, fitness apps like Peloton, Strava, Headspace, Calm, gaming services like Apple Arcade, PlayStation Plus, with ready-made presets. PREMIUM CARD FEE TRACKING Never forget your annual credit card fees. Track premium cards including American Express Platinum, American Express Gold, Chase Sapphire Reserve, Capital One Venture X, World of Hyatt, Marriott Bonvoy Brilliant, Delta Reserve, United Club Infinite, Hilton Honors Aspire. Get smart reminders 30 days before your annual fee is due. SMART ANALYTICS AND FORECASTS Visualize your spending with charts. See monthly and yearly totals, spending breakdown by category, monthly forecast showing how much you will spend this month, 12-month forecast showing all upcoming charges, and average spending by category. INTELLIGENT NOTIFICATIONS Get smart reminders before you are charged. Receive notifications one day before subscription renewal asking if you still use the service, 30 days before premium card annual fees, customizable notification times, and never miss an important charge. SIMPLE AND EASY TO USE Add subscriptions in seconds using ready-made presets. Select a service and you are done. Or create custom subscriptions manually. Beautiful interface with dark mode and light mode support, sort by name date or price, archive inactive subscriptions, and search and filter by categories. SECURITY AND PRIVACY Your data stays on your iPhone. No accounts or registration required, complete control over your data, and Face ID or Touch ID support coming soon. FLEXIBLE PRICING Free version lets you track up to 3 subscriptions. Premium version unlocks unlimited subscriptions with one-time purchase. WHO IS THIS FOR Perfect for anyone who has multiple subscriptions, premium credit card holders who want to track annual fees, people who want to optimize spending and find forgotten subscriptions, families who want to see total spending on services, and anyone tired of unexpected charges. REAL SAVINGS Research shows the average person spends over 200 dollars per month on subscriptions but forgets about many of them. With SubTrack you can see all your expenses in one place, find forgotten subscriptions you no longer use, make informed decisions about renewals, and save hundreds of dollars per year. WHAT MAKES US DIFFERENT FOCUSED ON SUBSCRIPTIONS AND PREMIUM CARDS We specialize in subscriptions and premium card fees. This makes our app faster and more convenient for tracking subscriptions specifically. MAXIMUM SIMPLICITY Add a subscription in 3 seconds. No complicated forms just the fields you need. Quick preset selection for popular services or manual entry for full control. FORECASTS AND ANALYTICS Not just a list of subscriptions but real understanding of when and how much you will spend. See monthly and yearly forecasts to plan your budget accordingly. SMART NOTIFICATIONS Not just simple reminders but intelligent notifications that help you make decisions. Get notified before you are charged and decide if you still need the service. NATIVE iOS DESIGN Modern SwiftUI interface with smooth animations. GET STARTED TODAY Download SubTrack free and add all your subscriptions in just 2 minutes. SubTrack is your personal assistant for managing subscriptions and finances. Download free today and take control of your recurring expenses.
Screenshots
Verdict
The clearest difference is in-app purchases: K2 Sim at none against SubTrack's 3. K2 Sim also leads on update cadence (every 2 weeks vs every 3 weeks). On price, ads, device support and iOS requirement 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. SubTrack sells 3 in-app purchases, starting at $0.99 per 7 days. K2 Sim asks for nothing beyond the download.
K2 Sim ships an update every 2 weeks, SubTrack every 3 weeks. The most recent releases landed on September 20, 2026 and September 13, 2026 respectively.
| Parameter | K2 Sim | SubTrack |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) — better | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 2 weeks — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 5 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | MIKYAS SULTAN BUSIRA | Alexander Zakharin |
In-app purchases
K2 Sim
No in-app purchases
SubTrack
- Pro Weekly3 Days trial$0.997 Days
- Pro Annual$9.991 Year
- Pro Lifetime$19.99









