Protractor+ is a utility app for iOS and Android that turns the camera into an angle measurement tool for DIY and construction tasks.
Product velocity
Maintenance
Daily rank 🇺🇸
—
Utilities
Sentiment
4.2
16k reviews
Nemesis
Fragmented field
The App DNA
What makes this app unique?
Users hire this app for quick, portable geometry checks on physical objects, but the current monetization design forces a trade-off between utility and ad-interruption that drives users to seek alternatives.
For DIY enthusiasts, students, and construction professionals requiring portable, camera-integrated angle measurement tools.
What does it look like?
Key features
Draw custom shapes on screen or camera preview to calculate internal angles
Overlay angle measurement tools onto real-time camera feed for physical object analysis
Pendulum-based tool to determine surface slope and vertical alignment
How much does it cost?
Monetization relies on an ad-supported free tier with a feature-gated premium upgrade for professional measurement modes.
Velocity
Maintenance developmentmonetizationUX improvementsShow more...
The app exhibits a maintenance-level cadence, with only two releases identified over the last six months, averaging approximately 0.08 releases per week. Development is currently focused on stability and minor bug fixes rather than new feature iteration. The latest release provided no functional updates, and the previous major update occurred in January 2026. The development trend is stable but minimal, indicating a focus on long-term support rather than active feature expansion.
Who built it?
Tue Nguyen Minh
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What do users think recently?
Review voice lately leans frustrated. Users appreciate visual camera overlay tools provide accurate measurements for quick home improvement tasks, but report aggressive monetization tactics restrict core functionality behind paywalls immediately after installation.
How are ratings & reviews evolving?
What users say, by theme
- Visual camera overlay tools provide accurate measurements for quick home improvement tasks
- Aggressive monetization tactics restrict core functionality behind paywalls immediately after installation
69 of 99 recent reviews analyzed · high confidence · Frustrated 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 Protractor+
How's the Utilities market?
Protractor+ maintains a 4.11 rating across 16,144 total ratings, but the low 99-review sample size suggests limited active engagement compared to specialized competitors. The monetization friction relative to the simple utility of the app creates a ceiling for growth.
Read the market outlookThe rivals identified
Unlock the deeper market read.
Access the full report for freeThe Analyst's Read
Key takeaways for Protractor+
Where is it heading?
The utility market is consolidating around apps that provide frictionless access to core tools, leaving Protractor+ exposed due to its aggressive monetization. Unless the team shifts to a trial-based model and resolves performance regressions, the app will continue to lose ground to competitors with higher release cadences.
- Aggressive paywall gating immediately after installation drives high churn, which compounds the negative sentiment visible in recent user reviews.
- Performance regressions in the latest update (lag and orientation issues) erode the core camera-measurement utility, further depressing the Android rating.
The SWOT
- Camera-based measurement mechanism enables immediate real-world utility
- Plumb Bob mode provides specialized retention for construction tasks
- Import-from-photo functionality for free users
- B2B partnerships with hardware retailers for tool distribution
Next best moves
Pivot monetization to a 3-day trial because paywall gating triggers high-churn sentiment → increase long-term retention
+ 1 more prioritized moveThe counter-intuitive read
The app's biggest risk is not the competitor feature set…
Read the full takeFeature gaps
Data documentation and export (available in Angle Meter PRO but absent here) +1
Since the last report: The app's competitive outlook remains negative as the PM pivots from feature development to urgent monetization and performance fixes to address high churn.
Bottom line
Protractor+ delivers high-utility camera measurement, but aggressive monetization kills the user experience, so the PM must pivot to a trial-based model to stop the churn and stabilize the rating.
Unlock 3 critical frictions, 3 market threats, 1 more prioritized move and the analyst’s take.
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