Report updated Jun 19, 2026
Time Calc. Pro
For users requiring a dedicated tool for time-based arithmetic who prefer a clutter-free interface.
Time Calc. Pro is an established utilities app that is a paid app.
What is Time Calc. Pro?
Time Calc. Pro is a specialized utility calculator for time-based arithmetic, available as a paid app on iOS.
Users hire this tool for distraction-free time math, as the ad-free design maximizes screen real estate for calculation history logs.
Current Momentum
v1.2 · 19mo ago
Zombie- Maintains paid-only monetization model.
- Last major update November 2024.
Active Nemesis
Time Duration/Add Calculator
By Kouji Yamauchi
Other Rivals
7-Day Rank Pulse 🇺🇸
UtilitiesNo ranking data
Rating Pulse 🇺🇸
Gathering signals...
What makes this app unique?
What Does It Look Like?
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What Are The Key Features?
Adds and subtracts hours and minutes for time-based arithmetic
Logs previous operations for reference on the history screen
Toggles between computer-style and phone-style keypad interfaces
Removes all advertisements to maximize screen real estate for the history log
How much does it cost?
- Single purchase at $0.99
Paid model at $0.99 removes ad-inventory to prioritize screen space for calculation history.
Who Built It?
Hiroyuki Nishijima
View Publisher Intel →Enrichment in progress
Publisher profile available very soon
What other apps does Hiroyuki Nishijima make?
What do users think recently?
Analysis in progress, available soon
What is the competitive landscape for Time Calc. Pro?
Where is it available?
Localized markets (12)
How's The Utilities Market?
Market outlook for this category
Available very soon
Which niche is Time Calc. Pro in?
to calculate durations of hours and minutes
Explore the full Time Calculation Calculators niche
Every app in this space (4 tracked), the niche's live rankings, and Marlvel's editorial take on the job-to-be-done.
The rivals identified
Nemeses(1)
This app is a direct functional competitor that focuses exclusively on time-based arithmetic, mirroring the core utility of Time Calc. Pro.
Differentiators
- Includes dedicated unit conversion features that expand utility beyond simple addition and subtraction tasks.
- Offers a more specialized focus on elapsed time calculations compared to the target's general layout.
Head to head
The target app should emphasize its superior UI customization and ad-free experience to differentiate from this more feature-dense but potentially cluttered rival.
Same space(4)
Both apps serve as specialized utility calculators designed to solve specific professional or technical math problems.
Differentiators
- Focuses on rule-of-three calculations which cater to design and photography workflows rather than time tracking.
- Maintains a more frequent update cadence, signaling active development and support for newer iOS versions.
This app competes for the same 'utility calculator' screen real estate by providing specialized structural engineering math.
Differentiators
- Provides advanced structural analysis solvers that offer significantly higher technical complexity than simple time arithmetic.
- Implements a clear monetization strategy through ad-removal IAP, creating a predictable revenue stream.
This is a utility tool that leverages device hardware for measurement, competing for the attention of users needing precision tools.
Differentiators
- Utilizes camera-based measurement and image analysis, providing a physical-world utility that time calculators cannot match.
- Includes robust data documentation features that allow users to save and export their measurement history.
This app targets a niche professional audience with a specialized calculator, overlapping with the target's utility-focused market.
Differentiators
- Provides industry-specific rigging geometry tools that solve highly technical problems for a professional user base.
- Offers greater unit flexibility tailored specifically to the requirements of rigging and construction professionals.
New entrants(2)
This newcomer includes a material calculator, which competes for the same 'utility' intent as the target app.
Differentiators
- Integrates a product catalog and commercial inquiry system, positioning the calculator as part of a broader business ecosystem.
This app is a new entrant in the utility category that combines calculation with scheduling and data management.
Differentiators
- Features an analytics dashboard and offline functionality that provide a more comprehensive user experience than simple arithmetic tools.
Compare Time Calc. Pro against every rival
All rivals in one side-by-side table: identity, store metrics, ratings & sentiment, and strategic intel, plus a head-to-head page for each.
The outtake for Time Calc. Pro
Strengths to defend, gaps to attack
Core Strengths
- Ad-free interface maximizes history log visibility
- Customizable key layouts provide ergonomic flexibility
Critical Frictions
- Premium tier at $0.99 above category median
- Lacks unit conversion tools found in rivals
Growth Levers
- Integrate unit conversion to match nemesis parity
- Expand into professional time-tracking workflows
Market Threats
- Free ad-supported rivals with broader feature sets
- New entrants integrating analytics dashboards
What are the next best moves?
Ship unit conversion tools because rivals include them → increase competitive parity
Nemesis app includes unit conversion, creating a feature gap that limits the target's utility.
Trade-off: Pause the keypad layout refinement sprint — unit conversion has higher impact on user acquisition.
A counter-intuitive read
The $0.99 price point is not a weakness but a signal of quality that filters for professional users who value screen real estate over free, ad-heavy alternatives.
Feature Gaps vs Competitors
- Unit conversion tools (available in Time Duration/Add Calculator)
Key Takeaways
Time Calc. Pro holds its niche through a clean, ad-free experience, but the lack of unit conversion tools limits its utility against free rivals, so the PM should prioritize feature parity to justify the $0.99 price.
Where Is It Heading?
Stable
Users report: the utility calculator market is consolidating around apps that offer integrated data management, leaving simple arithmetic tools exposed. Time Calc. Pro must move beyond basic calculation to maintain relevance against rivals that offer broader professional workflows.
The latest update focused on stability, suggesting the app is in a maintenance phase rather than active feature expansion.