Subscriptions vs K2 Sim
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Subscriptions
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Still paying for subscriptions you barely use? Subs.Killer is a simple subscription tracker that helps you manage prices, renewal dates, and real usage. It automatically shows your cost per use, so every monthly payment becomes easier to review. Streaming, music, gyms, cloud storage, work tools, memberships, and online services. See which recurring payments are worth keeping and which ones deserve a closer look. What Subs.Killer helps you do Track cost per use Enter the monthly price and tap "Used!" whenever you use a service. Subs.Killer calculates how much each use actually costs this month. Find review candidates Low-usage or high-cost subscriptions are organized automatically, helping you focus on the services that may be wasting money. Judge by service type Entertainment apps are reviewed by usage frequency. Cloud storage and infrastructure services are treated as fixed costs. Tools, gyms, and utility services are evaluated with context, not just raw usage count. Review before renewal Renewal countdowns and reminders help you decide before the next charge arrives. Keep input lightweight Add a name, price, and renewal date. Then record usage from the app or Home Screen widget with one tap. Key Features - Subscription, bill, and recurring payment tracking - Usage count for each service - Automatic cost-per-use calculation - Status rating: Elite / Keep / Review / Cancel - Annual potential savings - Review target list and well-used service list - Priority sorting - Renewal date countdown - Renewal reminders - Home Screen widgets for quick usage logging - Monthly total and unused-cost summary - Category analysis - CSV export - iCloud sync - 10 currencies: JPY, USD, EUR, GBP, CNY, KRW, TWD, AUD, CAD, CHF Recommended For - People who want a simple subscription manager - Anyone who finds full budget apps too much work - People trying to cut fixed costs - Users managing streaming, music, gyms, cloud storage, or software tools - Anyone who wants to avoid forgotten renewals - Minimalists who want a leaner spending setup Pro Plan (One-Time Purchase) Unlock every feature with a single purchase. - Unlimited subscriptions (Free plan: up to 8) - Automatic review and cancel candidate detection - Annual savings visualization - Renewal reminders - Detailed analysis and long-term history - Category analysis - CSV export - iCloud sync Subs.Killer is not a cancellation service. It helps you make clearer decisions about what to keep, review, or cancel. Privacy: Your data is stored locally on your device and is never sent to external servers.
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.
Screenshots
Verdict
The clearest difference is in-app purchases: K2 Sim at none against Subscriptions's 1. K2 Sim also leads on update cadence (every 2 weeks vs monthly). 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. Subscriptions sells 1 one-off in-app purchase. K2 Sim asks for nothing beyond the download.
Subscriptions ships an update monthly, K2 Sim every 2 weeks. The most recent releases landed on October 5, 2026 and October 7, 2026 respectively.
| Parameter | Subscriptions | K2 Sim |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (3 ratings) — better |
| Number of ratings | — | 3 — better |
| Update frequency | Monthly | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | — | Free |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 6 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | kurihara kazuki | MIKYAS SULTAN BUSIRA |
In-app purchases
Subscriptions
- Subs.Killer PRO$5.99
K2 Sim
No in-app purchases









