100cm Ruler is a productivity tool for physical measurements on iOS and Android devices.
Product velocity
Maintenance
Daily rank 🇺🇸
—
Productivity
Sentiment
4.6
14k reviews
Nemesis
Fragmented field
The App DNA
What makes this app unique?
Users hire the app for quick, ad-hoc measurement tasks that require a reliable, ad-free interface without the friction of subscription-based competitors.
For Users requiring quick, ad-hoc physical measurements using their mobile device as a reference tool.
What does it look like?
Key features
Calibrates ruler scale using common objects like coins or credit cards for accuracy
Dark UI theme designed to reduce eye strain and save battery on AMOLED displays
Saves previous length measurements for future reference
How much does it cost?
Monetization relies on ad-supported free usage with a one-time IAP gate for ad removal.
Velocity
Maintenance developmentUX improvementsperformanceShow more...
The app exhibits a maintenance-level cadence, with only two releases recorded over the last 18 months. Development is sporadic and focused primarily on platform-specific compatibility and minor bug fixes rather than new feature expansion. There is no evidence of live operations or recurring content updates. The current release frequency is insufficient to suggest active feature development.
Who built it?
ZOOMO
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What do users think recently?
Recent user voice shows a thrilled sentiment. Users appreciate simple and functional design provides a reliable tool for everyday measurement tasks and ad-free experience and lack of aggressive monetization build strong user trust, but report camera activation failures on specific hardware prevent the calibration feature from functioning.
How are ratings & reviews evolving?
What users say, by theme
- Simple and functional design provides a reliable tool for everyday measurement tasks
- Ad-free experience and lack of aggressive monetization build strong user trust
- Camera activation failures on specific hardware prevent the calibration feature from functioning
50 of 50 recent reviews analyzed · high confidence · Thrilled overall
Read the full review analysisUnlock 1 more frustration theme and 1 user request, each backed by review evidence.
Access the full report for freeCompetition
Competitive landscape for 100cm Ruler
How's the Productivity market?
The rivals identified
Unlock the deeper market read.
Access the full report for freeThe Analyst's Read
Key takeaways for 100cm Ruler
Where is it heading?
Users report: The utility market is consolidating around apps that offer both measurement and data management, leaving 100cm Ruler exposed to more versatile competitors. The PM must transition from a static tool to a more integrated utility to prevent churn to feature-rich alternatives.
- Camera initialization failures on specific hardware prevent the calibration feature from functioning, which erodes trust in the app's core utility.
- The ad-free experience continues to drive high user satisfaction, providing a stable foundation for potential future monetization experiments.
The SWOT
- Clean, ad-free utility design sustains high user trust
- Calibration-by-object mechanism provides high-accuracy utility without proprietary hardware
- Implement measurement history export to differentiate from basic scanners
- Add multi-format scanning to capture broader utility users
Next best moves
Audit camera initialization logic because hardware-specific failures are a top complaint → improve core utility reliability
+ 1 more prioritized moveThe counter-intuitive read
The app's lack of aggressive monetization is its primary growth constraint…
Read the full takeFeature gaps
Scan history management (available in QR Code Reader+Barcode Scanner but absent here)
Since the last report: The app's outlook stabilized as the focus shifted from perceived abandonment to addressing specific technical hardware-compatibility issues.
Bottom line
100cm Ruler maintains a strong user base through its ad-free utility, but camera initialization failures threaten its core functionality, so the PM should prioritize stability fixes to defend the current retention rate.
Unlock 2 critical frictions, 2 market threats, 1 more prioritized move and the analyst’s take.
Access the full report for freeFAQ
Is 100cm Ruler free to use?
Does 100cm Ruler work without an internet connection?
How does 100cm Ruler compare to other measurement apps?
Report last updated