Comparison

Subscriptions vs K2 Sim

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

Head to head
About

Subscriptions

Features
Read full description

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.

About

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.

Highlights
  • Explore market charts
  • Study trading ideas
  • Use historical market data
  • View price action
  • Review strategy behavior
  • Learn pattern performance
Features
Read full description

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

Subscriptions4 screens
K2 Sim4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Subscriptions sells 1 one-off in-app purchase. K2 Sim asks for nothing beyond the download.

UpkeepUpdate frequency

Subscriptions ships an update monthly, K2 Sim every 2 weeks. The most recent releases landed on October 5, 2026 and October 7, 2026 respectively.

Scorecard2 real differences · 7 level
Subscriptions versus K2 Sim: the parameters behind the verdict, then further details
ParameterSubscriptionsK2 Sim
PriceFreeFree
Rating—5.0 (3 ratings) — better
Number of ratings—3 — better
Update frequencyMonthlyEvery 2 weeks — better
AdsNoNo
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.016.0 — better
Further details — not scored
Size6 MB6 MB
Age rating4+4+
Developerkurihara kazukiMIKYAS SULTAN BUSIRA

In-app purchases

1 purchases

Subscriptions

One-time1
  • Subs.Killer PRO$5.99
None

K2 Sim

No in-app purchases

Questions

Is Subscriptions free?
Subscriptions is free to download, with in-app purchases available.
Is K2 Sim free?
K2 Sim is free to download, with no in-app purchases.
Do Subscriptions or K2 Sim have ads?
Neither Subscriptions nor K2 Sim shows ads.
Which is updated more often, Subscriptions or K2 Sim?
Subscriptions ships an update monthly, and K2 Sim every 2 weeks. Most recently, Subscriptions was updated on October 5, 2026 and K2 Sim on October 7, 2026.

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