Time Duration/Add Calculator is a free, ad-supported utility for calculating time intervals and date arithmetic on iOS and Android.
The App DNA
What makes this app unique?
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.
For Users requiring quick, utility-based time arithmetic for scheduling or duration tracking.
What does it look like?
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?
The app operates on a free, ad-supported model with no in-app purchases.
Velocity
Dormant developmentopaqueShow more...
The app has not received an update in over 15 months, placing it firmly in the zombie category. Development activity is non-existent, with the last recorded release occurring in early 2024. There is no evidence of ongoing maintenance, feature development, or live operations support.
Who built it?
Kouji Yamauchi
9 apps tracked · Utilities
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카타카나 게임User Sentiment
What do users think recently?
How are ratings & reviews evolving?
Not enough recent reviews to extract reliable themes yet.
Read the full review analysisCompetition
Competitive landscape for Time Duration/Add Calculator
How's the Utilities market?
The app lacks significant market presence, evidenced by a zero-rating count across both iOS and Android platforms. This absence of social proof makes it difficult to compete with rivals that have established large user bases.
Read the market outlookThe rivals identified
Unlock the deeper market read.
Access the full report for freeThe Analyst's Read
Key takeaways for Time Duration/Add Calculator
Where is it heading?
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.
The SWOT
- Ad-supported model removes the entry barrier for casual users.
- Integration of history logs to improve user retention.
- Addition of multi-time zone support to match direct rivals.
Next best moves
Ship history logs because competitors use logs to increase session frequency → improve retention.
+ 1 more prioritized moveThe counter-intuitive read
The lack of updates is not just a maintenance failure…
Read the full takeFeature gaps
Multi-time zone support (available in Time Duration Calculator) +2
Since the last report: The app's competitive position has declined due to prolonged development stagnation, prompting a pivot in strategy toward feature parity with active, high-velocity rivals.
Bottom line
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.
Unlock 3 critical frictions, 2 market threats, 1 more prioritized move and the analyst’s take.
Access the full report for freeReport last updated