Calca vs its rivals

Side-by-side comparison against Calca's closest competitors — identity, store metrics, ratings & sentiment, and strategic intel.

Calca
This App
Soulver 3
Nemesis
Drafts
Peer
Core Identity
DeveloperKrueger Systems, Inc.Zac CohanChegg, Inc.DesmosSymbolabAgile TortoiseNotion Labs, Incorporated
CategoryProductivityProductivityEducationEducationEducationProductivityProductivity
PlatformAndroid, iOSiOSiOSiOS, AndroidiOSiOSAndroid, iOS
Store Metrics
Rating4.5 / 54.9 / 54.9 / 54.3 / 54.6 / 54.8 / 54.8 / 5
Ratings Count152396424,7851,24425,99810,47882,804
PriceUSD9.99FreeFreeFreeFreeFreeFree
Release DateJul 6, 2013May 3, 2020Sep 4, 2012Jun 18, 2013May 21, 2014Apr 22, 2018Sep 14, 2017
Last UpdatedOct 17, 2025Apr 17, 2026Apr 14, 2026Mar 12, 2026Dec 17, 2025Apr 15, 2026May 5, 2026
Sentiment & Reviews
Sentimentmixed-terribleexcellent-positivenegative
Score65/100-20/10085/100-78/10035/100
Praises
  • Mathematical sketchpad functionality allows users to model complex life calculations with natural language
  • Markdown integration enables users to document and communicate computational concepts effectively
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  • Step by step equation breakdown helps students grasp difficult mathematical concepts independently
  • Snap and solve camera feature provides quick homework assistance for complex equations
  • Versatile graphing and calculation tools provide academic utility for students and engineering professionals
  • Intuitive interface design makes complex mathematical visualization accessible for casual and advanced users
  • Creative features like audio tone generation and custom color palettes encourage non-academic exploration
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  • Extensible automation actions allow users to build custom text processing workflows for daily productivity
  • Frictionless capture interface enables rapid note entry without distracting UI elements or complex menus
  • Relational database structure provides powerful organization for personal and professional knowledge management
Complaints
  • Hardware keyboard input bugs on iPad devices prevent accurate numerical entry
  • Obtrusive donation requests disrupt the user workflow and degrade the interface experience
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  • Persistent cookie consent overlay blocks critical answer visibility on mobile screens
  • Frequent forced sign in cycles disrupt homework flow and user retention
  • Inconsistent problem solving accuracy leads to distrust in the core utility
  • Lack of a native dark mode causes eye strain during extended night-time study sessions
  • UI regressions in the latest update make function selection and list management cumbersome
  • Inconsistent behavior with external hardware like Bluetooth keyboards limits productivity on tablet devices
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  • Editor display failures following the latest update render text invisible and inaccessible for some users
  • Aggressive subscription prompts and review requests disrupt the writing flow for long-term users
  • Frequent app crashes and UI freezing during text editing sessions on mobile devices
Requests
  • Cloud storage integration for documents to improve cross-device file management
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  • Integration of geometry and 3D graphing modes to match the functionality of the web version
  • Persistent settings for interface preferences like contrast and text size to avoid manual reconfiguration
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  • Passcode protection option requested to secure sensitive personal notes and private thoughts within the app
  • Toggle switch to disable or hide AI features from the primary interface
Strategic Intel
Strengths
  • Symbolic engine enables complex variable manipulation on-device
  • Markdown integration creates a unique document-based workflow
  • iCloud sync maintains state across devices
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  • Multi-subject calculator suite provides utility across the entire academic curriculum
  • Established brand trust in the dedicated math-solver niche
  • Proprietary math engine enables complex calculus visualization
  • Accessibility suite functions as a B2B distribution moat into institutional partnerships
  • Ad-free interface drives high academic trust
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  • High-speed capture UX reduces friction for rapid note entry.
  • Deep automation library creates high switching costs for power users.
  • Cross-platform Apple ecosystem sync ensures consistent availability.
  • Relational database engine enables complex knowledge management systems
  • Template library lowers barrier to entry for new users
Weaknesses
  • iPad hardware keyboard bugs render entry unusable
  • Android-iOS rating gap indicates platform-specific quality issues
  • Intrusive donation prompts degrade user experience
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  • Persistent cookie banner blocks primary value delivery
  • Forced logout loops disrupt active study sessions
  • Premium tier lacks conversational AI feedback
  • No native dark mode despite high-frequency user requests
  • UI regressions in the latest update make function selection cumbersome
  • Inconsistent Bluetooth keyboard support limits tablet productivity
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  • Editor display failures in the latest update erode trust.
  • Aggressive subscription prompts disrupt the core writing flow.
  • Steep learning curve for advanced automation features.
  • Mobile app crashes during long editing sessions
  • Forced AI elements disrupt core UI
Pricingfreemiumfreemiumsubscriptionfreefreemiumsubscriptionfreemium
MomentumSteadyIntenseMaintenance--IntenseActive
Update Cadence5 versions5 versions2 versions, 1 majors/6mo, ~26d avg--5 versions5 versions, ~5d avg

Compare Calca head-to-head

Disclosure: Independent intel to help mobile builders succeed.

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

Data licensed under CC-BY-NC 4.0