Comparison

SubZen vs CostKeeper

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

Head to head
About

SubZen

Effortlessly track all your recurring payments in one place. Get timely reminders before charges hit, understand your spending habits, and manage subscriptions across different currencies. All your data stays private on your device.

Highlights
  • Track all subscriptions in one place
  • Receive renewal reminders
  • Analyze recurring spending
  • Plan renewals with calendar view
  • Support for multiple currencies
  • Import and export subscription data
  • Manage subscription status (pause, cancel, delete)
Features
Read full description

SubZen is the subscription tracker for people who want to know what renews, when it renews, and how much it costs—without linking a bank account or creating another account. No account. No bank link. Free, always. See upcoming renewals, understand your spending, move through billing weeks, and manage every subscription from a clean interface built for iPhone. KEY FEATURES - Track every subscription in one place Add streaming services, apps, software, memberships, cloud storage, news, fitness, gaming, and any other recurring payment. Keep costs, billing dates, categories, notes, tags, and payment labels organized. - Get reminders before charges hit Choose a reminder for the same day, 1 day, 3 days, or 1 week before renewal. See upcoming payments before they surprise you. - Understand your recurring spending View monthly and yearly totals, compare categories, explore your biggest commitments, and see how each subscription contributes to your spending. - Plan renewals with Calendar See which subscriptions renew each day and move through upcoming billing weeks without losing sight of recent renewals. - Track subscriptions in any currency Use USD, EUR, GBP, CAD, AUD, JPY, and many more. SubZen converts recurring costs into your preferred currency using current exchange rates, with offline fallback rates when needed. - Import and export your data Bring subscriptions into SubZen from CSV or JSON, review changes before saving, and export a portable copy whenever you want. - Pause, resume, cancel, or delete Pause or cancel a subscription without removing its history, or delete it entirely when you no longer need it. - Private by design Your subscription records stay on your device. Optional iCloud backup syncs them through your own Apple account. No SubZen account required. - Add subscriptions faster Browse an expanded service catalog with recognizable logos, search popular services, or create a completely custom subscription. WHY SUBZEN SubZen focuses on one job: helping you understand and manage subscriptions without a bank connection or complicated budgeting system. Use SubZen to: - Know what renews next - Track monthly and yearly costs - Plan around upcoming charges - Organize subscriptions across currencies - Keep a portable copy of your data - See spending insights without the clutter Download SubZen and finally know what you are paying for. Terms of Use: https://subzenapp.netlify.app/terms Privacy Policy: https://subzenapp.netlify.app/privacy-policy

About

CostKeeper

Read full description

CostKeeper is a smart bookkeeping app focused on item value management, helping you track the purchase price, daily average value, and usage cycle of items, making consumption more rational and asset management clearer. Core Features: · Item Recording - Quickly add item information with detailed records of name, price, purchase date, etc. - Item photo capture to visually document your belongings - Custom category management covering 10+ categories including clothing, electronics, home, books, beauty, sports, tools, plants, pets, and more · Data Visualization - Annual/monthly spending trend charts clearly showing consumption patterns - Category distribution charts to understand spending structure - Top 5 daily cost ranking to identify items with highest daily costs - Great value item recommendations to identify cost-effective purchases · Privacy Protection - CostKeeper is a purely local application. All your data is stored locally on your device and will not be uploaded to the cloud, fully protecting your privacy and security. · Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

SubZen4 screens
CostKeeper4 screens

Verdict

The call

The clearest difference is device support: CostKeeper at 3 against SubZen's 1. CostKeeper also leads on iOS requirement (13.0 vs 16.4). On price, update cadence, ads and in-app purchases 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. SubZen sells 6 in-app purchases, starting at $0.99 per month and CostKeeper sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

SubZen ships an update fortnightly, CostKeeper monthly. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 7 level
SubZen versus CostKeeper: the parameters behind the verdict, then further details
ParameterSubZenCostKeeper
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyFortnightly — betterMonthly
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS16.413.0 — better
Further details — not scored
Size65 MB26 MB
Age rating4+4+
DeveloperMichael Abou Khalil思宇 周

In-app purchases

6 purchases

SubZen

Subscriptions1
  • SubZen Pro$0.991 Month
One-time5
  • Support SubZen - Small$1.99
  • Support SubZen - Kind$2.99
  • Support SubZen - Generous$5.99
Show 2 more
  • Support SubZen - Big$10.99
  • Support SubZen - Amazing$19.99
3 purchases

CostKeeper

Subscriptions3
  • Monthly Plan7 Days trial$1.991 Month
  • Semi-Annual Plan7 Days trial$9.996 Months
  • Annual Plan7 Days trial$17.991 Year

Questions

Is SubZen free?
SubZen is free to download, with in-app purchases available.
Is CostKeeper free?
CostKeeper is free to download, with in-app purchases available.
Do SubZen or CostKeeper have ads?
Neither SubZen nor CostKeeper shows ads.
Which is updated more often, SubZen or CostKeeper?
SubZen ships an update fortnightly, and CostKeeper monthly. Most recently, SubZen was updated on October 28, 2026 and CostKeeper on October 31, 2026.

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