Report updated May 25, 2026
Time Duration/Add Calculator
For users requiring quick, utility-based time arithmetic for scheduling or duration tracking.
Time Duration/Add Calculator is an established utilities app that is completely free.
What is Time Duration/Add Calculator?
Time Duration/Add Calculator is a free, ad-supported utility for calculating time intervals and date arithmetic on iOS and Android.
Users hire this app to solve specific scheduling or duration-tracking problems, but the lack of feature updates makes it a fragile choice compared to actively maintained rivals.
Current Momentum
v1.5 · 27mo ago
Zombie- No feature updates in 12 months.
- Stagnant release cadence since 2023.
Active Nemesis
Fragmented niche
No dominant direct rival identified yet. See Other Rivals below.
Other Rivals
7-Day Rank Pulse 🇺🇸
UtilitiesNo ranking data
Rating Pulse 🇺🇸
Gathering signals...
What makes this app unique?
What Does It Look Like?
Loading...
What Are The Key Features?
Calculates duration between two specific timestamps or dates.
Computes future or past timestamps by adding or subtracting durations.
Converts time intervals into alternative units.
How much does it cost?
- Free with ad support
The app operates on a free, ad-supported model with no in-app purchases.
Who Built It?
Enrichment in progress
Publisher profile available very soon
What other apps does Kouji Yamauchi make?
Fabricante de Ruleta
Juegos
카타카나 게임
게임
What do users think recently?
Analysis in progress, available soon
What is the competitive landscape for Time Duration/Add Calculator?
Where is it available?
Localized markets (4)
How's The Utilities Market?
Market outlook for this category
Available very soon
Which niche is Time Duration/Add Calculator in?
to calculate time durations and intervals
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 the primary nemesis because it offers a comprehensive suite of time-based utilities that directly overlap with the target's core functionality while providing significantly more depth.
Contenders(1)
This app competes by offering a more professional-grade calculation engine and history tracking, appealing to users who need to perform complex time-based arithmetic.
Same space(4)
This app overlaps with the target by providing date-based arithmetic, specifically focusing on age and duration between calendar dates.
Differentiators
- Leverages massive scale with over 78,000 ratings, creating a strong social proof barrier for new users.
- Integrates lifestyle features like horoscope tracking to increase user engagement beyond simple date arithmetic.
This app competes by offering a broader utility suite that includes time calculation alongside standard scientific and arithmetic functions.
This app is a direct functional peer that targets the exact same use case of calculating intervals between two points in time.
Differentiators
- Includes multi-time zone support, which is critical for users calculating durations across different geographic regions.
- Features a built-in history log that helps users track and reference past time calculation sessions.
This app shares the same utility-focused audience by prioritizing speed and live results for general calculation needs.
Differentiators
- Offers specialized currency and percentage modes that extend utility beyond simple time duration calculations.
- Maintains a high release cadence with five updates in six months, ensuring superior platform compatibility.
New entrants(1)
This newcomer enters the space with a focus on modern, privacy-conscious time tracking and asset-based date counting.
Differentiators
- Prioritizes offline privacy and asset tracking, appealing to users wary of cloud-based data collection practices.
Compare Time Duration/Add Calculator 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 Duration/Add Calculator
Strengths to defend, gaps to attack
Core Strengths
- Ad-supported model removes the entry barrier for casual users.
Critical Frictions
- Zero-rating profile across both platforms signals low user engagement.
- No updates since early 2024 on iOS and 2023 on Android.
- Lack of wearable or cross-platform sync features.
Growth Levers
- Integration of history logs to improve user retention.
- Addition of multi-time zone support to match direct rivals.
Market Threats
- High-velocity competitors like Dash Calc erode market share through frequent updates.
- Lack of social proof compared to rivals with 78,000+ ratings.
What are the next best moves?
Ship history logs because competitors use logs to increase session frequency → improve retention.
Competitors like Time Duration Calculator use history logs to drive repeat usage.
Trade-off: Pause UI polish work — functional utility is the primary driver for this segment.
Audit ad-placement frequency because ad-supported apps require high volume for revenue → stabilize user sentiment.
The app relies on ads for revenue, requiring a balance between monetization and user experience.
Trade-off: No major lever displaced — audit is a low-resource maintenance task.
A counter-intuitive read
The lack of updates is not just a maintenance failure, but a strategic vulnerability that allows competitors with higher release cadences to define the standard for time-utility apps.
Feature Gaps vs Competitors
- Multi-time zone support (available in Time Duration Calculator)
- History log (available in Time Duration Calculator and CalcFast)
- Apple Watch integration (available in CalcFast)
Key Takeaways
The app provides basic utility but lacks the active development required to compete, so the PM should prioritize adding history logs to drive retention before the user base migrates to more frequently updated alternatives.
Where Is It Heading?
Declining
The utility-calculator market is consolidating around apps that offer high-velocity updates and lifestyle integrations. Without a shift to active development, this app will continue to lose visibility to competitors that prioritize user engagement features.
The lack of updates since 2023 on Android signals a shift to maintenance mode, which reduces the app's ability to retain users against active rivals.