Comparison

b.stage vs Instant Cal

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

Head to head
About

b.stage

Connect directly with your favorite stars through exclusive membership benefits, community features, and direct engagement. Purchase merchandise, tickets, and participate in events. Earn digital rewards for fan activities.

Highlights
  • Exclusive membership benefits
  • Official fan community
  • Merchandise and ticket shop
  • Live show audience applications
  • 1:1 artist live chat
  • Digital rewards for fan activities
Features
Read full description

Connect with your favorite star. Stay with b.stage - Membership Get an unique experience with exclusive membership benefits - Community Become part of the official fan community - Shop and Tickets Purchase official merchandise and tickets! - Surveys Apply to be part of a live show audience and participate in events - b.stage POP Experience new ways to engage with artists through live chat using 1:1 TALK feature - Rewards Earn digital rewards through participating fan activities Discover all the latest news from your favorite stars on b.stage. [App Access Permission] * Optional Access (You may still use the service when you choose not to grant access) - Photo Access: Upload photo and and multimedia file - Camera Access: Enabled for photo or video recording - Microphone Access: Enabled for voice messages and video recording [Terms of Service and Privacy Policy] - Terms of Service: https://bstage.in/terms/ - Privacy Policy: https://bstage.in/privacy-policy/ [Customer Support] https://support.bstage.in/

About

Instant Cal

Features
Read full description

See results the moment you type. Instant Calc is an all-in-one calculator that shows results as you enter numbers — no Calculate button needed. Just type and see. 15 Specialized Calculators Finance & Daily Life • Discount Calculator — Instantly calculate sale prices and savings • Loan Calculator — Monthly payment, total interest, full amortization • Savings Calculator — Final balance and after-tax interest • Currency Converter — Real-time rates for 14 currencies Dining & Splitting • Tip Calculator — Split bills with custom tip percentages • Dutch Pay — Divide any bill evenly among any number of people Health • BMI Calculator — Body mass index with health grade (ft/lb or cm/kg) • Age Calculator — Exact age in years, months, days + birthday countdown Unit Conversion • Length, Weight & Temperature converter (imperial ↔ metric) • Fuel Efficiency — MPG and km/L • Unit Price Comparison — Find the better deal instantly • Date Calculator — Days between dates, D-day countdown • Math & Engineering — Expression evaluator, trig, fraction→decimal Key Features 4 Languages — Korean · English · Japanese · Chinese Dark Mode / Light Mode toggle Favorites — Pin your most-used calculators to the top History — Review any past calculation anytime Large Text Mode — Bigger display for comfortable reading Live Exchange Rates — Auto-updated via KEB Hana Bank No sign-up. No clutter. Open the app and start calculating.

Screenshots

b.stage4 screens
Instant Cal4 screens

Verdict

The call

The clearest difference is in-app purchases: Instant Cal at none against b.stage's 10. On price, update cadence, ads 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. b.stage sells 10 in-app purchases, starting at $4.99 per month. Instant Cal asks for nothing beyond the download.

UpkeepUpdate frequency

b.stage ships an update every 3 weeks, Instant Cal every 2 weeks. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

Scorecard1 real difference · 9 level
b.stage versus Instant Cal: the parameters behind the verdict, then further details
Parameterb.stageInstant Cal
PriceFreeFree
Rating3.4 (48 ratings) — better—
Positive reviews39.2% of reviews—
Number of ratings48 — better—
Update frequencyEvery 3 weeksEvery 2 weeks — better
AdsYesYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size214 MB31 MB
Age rating4+4+
DeveloperbemyfriendsTaek Oh

In-app purchases

10 purchases

b.stage

Subscriptions5
  • 'POP'subscription Ticket$4.991 Month
  • 노매드(NOMAD) 'POP' 구독형 이용권$8.991 Month
  • 노매드 라이브 & 채팅 'POP' 구독형 이용권$11.991 Month
Show 2 more
  • 노매드 라이브 & 채팅 'POP' 구독형 이용권$14.991 Month
  • 노매드 라이브 & 채팅 'POP' 구독형 이용권$19.991 Month
One-time5
  • 영데이 움직이는 스티커 상품$0.49
  • Live Chat'POP' Periodic Ticket$3.99
  • 화사 라이브 & 채팅 'POP' 기간형 이용권$3.99
Show 2 more
  • Live&Chat 'POP' PeriodicTicket$3.99
  • T1 Membership (Single)$6.99
None

Instant Cal

No in-app purchases

Questions

Is b.stage free?
b.stage is free to download, with in-app purchases available.
Is Instant Cal free?
Instant Cal is free to download, with no in-app purchases.
Do b.stage or Instant Cal have ads?
Both b.stage and Instant Cal show ads.
Which is updated more often, b.stage or Instant Cal?
b.stage ships an update every 3 weeks, and Instant Cal every 2 weeks. Most recently, b.stage was updated on November 7, 2026 and Instant Cal on October 31, 2026.

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