Calculator·

Calculator·

By Tim O's Studios

Calculator· is a utility app providing basic arithmetic and advanced math functions across iOS and Android.

The App DNA

What makes this app unique?

Users hire the app for low-friction, everyday calculation tasks that avoid the complexity of feature-heavy alternatives.

For Users seeking a simple, multi-platform calculator utility with optional advanced functions for tablet and wearable devices.

What does it look like?

Key features

Basic Arithmeticbasic

Addition, subtraction, multiplication, division, and percentage calculations.

iPad Split Viewedge

Allows concurrent app usage on iPad.

Advanced Math Functionsstandard

Square, square root, and inverse functions.

How much does it cost?

subscriptionFree tierPremium Access (1-month or 1-year)

Monetization relies on a subscription model for premium features, with a trial period to lower the barrier to entry.

Velocity

Maintenance developmentUX improvementsperformanceShow more...

The app ships approximately 0.08 releases per week over the last 14 months, placing it firmly in the maintenance tier. Development is characterized by infrequent, minor stability updates with no evidence of new features or live operations. The latest release, while updating the design language, remains an outlier in a history otherwise dominated by generic bug fixes. The development trend is stable at a low-frequency maintenance level.

See all version history

Who built it?

Tim O's Studios

13+ apps tracked · Utilities

Speedometer»Speedometer»Speedometer‰Speedometer‰Calculator‰Calculator‰Compass°Compass°Stopwatch‰Stopwatch‰Flashlight - Night Light ClockFlashlight - Night Light ClockLoan Calculator‰Loan Calculator‰BMI Calculator‰BMI Calculator‰Level-Level-Coloring² - Color By NumberColoring² - Color By NumberSudoku·Sudoku·Tip Calculator‰Tip Calculator‰
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User Sentiment

What do users think recently?

Review voice lately leans mixed. Users appreciate simple and accurate calculation interface provides reliable utility for everyday household budget management tasks, but report post-update ui regressions remove critical features like real-time sum display and quick answer feedback.

How are ratings & reviews evolving?

Google Play
4.35 · 765k
App Store
4.85 · 34k

What users say, by theme

What Users Love
  • Simple and accurate calculation interface provides reliable utility for everyday household budget management tasks
What Frustrates Users
  • Post-update UI regressions remove critical features like real-time sum display and quick answer feedback
What Users Want 1 request inside

99 of 99 recent reviews analyzed · high confidence · Mixed overall

Read the full review analysis

Unlock 1 user request, each backed by review evidence.

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Competition

Competitive landscape for Calculator·

How's the Utilities market?

The app maintains a high rating of 4.85 across 34,074 iOS reviews, but recent technical instability in the latest release threatens its standing against high-velocity rivals.

Read the market outlook

The rivals identified

Calculator₊
Calculator₊active nemesis

By Impala Studios

With over 1.7 million ratings and a high-velocity release cadence of 9 updates in six months, this app dominates the utility calculator space.

  • Maintains a high-frequency update cycle that consistently outpaces this app's development velocity.
  • Offers a mature, feature-rich interface that has been refined through over a decade of user feedback.
  • Leverages a massive install base to maintain top-tier visibility in the Utilities category.
Calculator· vs Calculator₊

Unlock the head-to-head verdict: where this rival wins, and where it loses.

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The Analyst's Read

Key takeaways for Calculator·

Where is it heading?

The utility calculator market is consolidating around high-velocity competitors that offer both simplicity and feature parity. Calculator· is currently exposed due to its recent technical regressions, so the PM must pivot to stability to avoid losing the user base to more reliable alternatives.

  • UI regressions in the latest update remove critical productivity features, which compounds the rating drag already visible on Android.
  • Technical errors in basic math functions erode user trust, accelerating churn pressure toward more reliable stock calculator alternatives.

The SWOT

Core Strengths
  • Clean interface avoids feature bloat
  • Apple Watch support increases engagement frequency
Critical Frictions 3 weaknesses inside
Growth Levers
  • Integration of currency and unit converters
Market Threats 2 threats identified

Next best moves

1 Pivot · 1 Invest

Restore running total feature because it is the top-cited productivity loss → stabilize user sentiment

+ 1 more prioritized move

The counter-intuitive read

The app's simplicity is its primary vulnerability…

Read the full take

Feature gaps

Currency conversion (available in Calculator₊ but missing here) +1

Since the last report: The app transitioned to a subscription-based model and experienced a decline in user sentiment due to technical regressions and feature removals in the latest update.

Bottom line

The app succeeds as a simple utility, but recent UI regressions and calculation errors threaten its core value, so the PM must prioritize stability over new features to prevent churn.

Unlock 3 critical frictions, 2 market threats, 1 more prioritized move and the analyst’s take.

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Report last updated

Disclosure: Independent intel to help mobile builders succeed.

AI-powered analysis with automated quality gates, built from publicly available sources. Marlvel.ai is not affiliated with, endorsed by, or sponsored by Calculator·, its developer, the app publisher, Apple, or Google Play. All trademarks, logos, and screenshots referenced remain the property of their respective owners.

What's new

The app transitioned to a subscription-based model and experienced a decline in user sentiment due to technical regressions and feature removals in the latest update.

shifted

Subscription Model Adoption

declined

Emergence of Critical Complaints

removed

Loss of Productivity Features

added

New Weaknesses and Threats

Cite this report

Marlvel.ai. “Calculator· Intelligence Report.” Updated May 6, 2026. https://marlvel.ai/apps/calculator

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