Calculator! is a utility app for iOS and Android providing standard and scientific math functions with integrated note-taking.
Product velocity
Dormant
Daily rank 🇺🇸
—
Utilities
Sentiment
4.4
769k reviews
Nemesis
Calculator₊
The App DNA
What makes this app unique?
Users hire the app to maintain a persistent, ad-free record of complex calculations that standard system calculators fail to provide.
For Math students and professionals requiring persistent history and note-taking capabilities.
What does it look like?
Key features
30+ scientific operations.
Handwritten notes within the app.
Logs past calculations.
Leather color and texture changes.
Print notes and history.
How much does it cost?
Split-platform model uses a flat fee on iOS to gate customization while maintaining free utility on Android.
Velocity
Dormant developmentUX improvementsperformanceShow more...
The app exhibits a zombie development pattern, characterized by extreme inactivity. Between 2016 and 2020, the release cadence was negligible, and the most recent update in March 2026 is an isolated event after a multi-year hiatus. There is no evidence of a consistent development pipeline or operational support, as the vast majority of historical releases consist only of minor bug fixes.
Who built it?
7th Gear
4 apps tracked · Utilities
Tide Charts
Linterna!
Calculator for iPad!User Sentiment
What do users think recently?
Fresh user feedback skews mixed. Users appreciate simple and accurate calculation tools provide reliable utility for everyday personal and business tasks and integrated note-taking and calculation logs assist users in managing complex multi-step financial references, but report recent design changes post-update removed critical quick-answer displays and altered input box functionality.
How are ratings & reviews evolving?
What users say, by theme
- Simple and accurate calculation tools provide reliable utility for everyday personal and business tasks
- Integrated note-taking and calculation logs assist users in managing complex multi-step financial references
- One-time purchase model offers a fair value proposition compared to subscription-based calculator alternatives
- Recent design changes post-update removed critical quick-answer displays and altered input box functionality
99 of 99 recent reviews analyzed · high confidence · Mixed overall
Read the full review analysisUnlock 2 more frustration themes and 2 user requests, each backed by review evidence.
Access the full report for freeCompetition
Competitive landscape for Calculator!
How's the Utilities market?
Calculator! holds a #73 Paid rank in the US Utilities category, with the iOS version maintaining a 4.78 rating. The lack of recent updates on iOS compared to the Android release cadence signals a potential drift in platform priority.
Read the market outlookThe rivals identified
By Impala Studios
This app dominates the utility calculator space with a massive user base and a high-frequency release cadence that directly challenges our target's market share.
- Maintains a high-frequency update cycle with 9 releases in the last six months to ensure OS compatibility.
- Offers a highly polished, feature-rich interface that has captured a massive, loyal user base over 15 years.
- Monetization strategy focuses on a free-to-use model that creates significant friction for paid utility competitors.
Unlock the head-to-head verdict: where this rival wins, and where it loses.
Access the full report for freeThe Analyst's Read
Key takeaways for Calculator!
Where is it heading?
The utility calculator market is consolidating around high-frequency, AI-integrated entrants that offer more than basic arithmetic. Calculator! remains exposed due to its static feature set and recent stability issues, so revenue growth hinges on modernizing the core toolset before the user base migrates to more reliable alternatives.
- Technical regressions in the latest update cause lock-screen navigation, which directly erodes the daily active habit.
- Broken widget functionality on newer hardware triggers negative reviews, compounding the rating drag already visible on Android.
The SWOT
- Leather-textured UI creates distinct brand identity
- Integrated note-taking provides utility beyond arithmetic
- One-time purchase model avoids subscription fatigue
- Integration of native currency and unit converters
- Expansion into educational graphing tools
Next best moves
Rebuild widget functionality because it is a top-reported frustration on new hardware → restore user trust
+ 1 more prioritized moveThe counter-intuitive read
The app's one-time purchase model is a liability, not a strength…
Read the full takeFeature gaps
Graphing capabilities (available in Desmos) +1
Since the last report: The app shifted to a paid model and introduced UI customization, but faces significant sentiment headwinds due to post-update stability issues and feature regressions.
Bottom line
Calculator! maintains a loyal base through its ad-free, one-time purchase model, but recent UI regressions and broken widgets threaten its utility status, so the PM must prioritize restoring core display functionality to stabilize the rating.
Unlock 3 critical frictions, 3 market threats, 1 more prioritized move and the analyst’s take.
Access the full report for freeReport last updated