InstruKit: All-in-One Toolbox
Measure, Scan, Detect & More
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
InstruKit turns the sensors, camera, and compute already in your iPhone into a focused, precise-feeling set of pocket instruments. It doesn't just show you one reading — it helps you save results, archive them into projects, and compare change over time. Measure, Save, Compare.
Why choose InstruKit:
- No login required — open and measure
- No ads, no tracking
- A dozen-plus tools for angle, sound, vibration, light, magnetic fields, location, and camera capture
- The core loop: Measure → Save → Compare
- Every record carries its source, method, and confidence
- Data stays on your device by default
The toolset:
- Level: surface / edge / plumb angles with zero-reference support
- Sound Level: real-time relative digital level (dB), 24-band spectrum, and recording summaries
- Vibration: acceleration RMS / peak measurement and recording summaries
- Light Estimate: illuminance estimated from camera exposure parameters (experimental)
- Magnetic: field strength readings and relative fastener magnetic-anomaly detection
- Location & Heading: single-point coordinates, altitude, and heading
- Magnifier / Text Recognition / Code Scanning: viewfinder, recognition, and saving
- Optical RPM (experimental): rotation speed estimated from camera frame-rate observation
- Flashlight / Screen Light: multi-mode lighting utilities
- Device Info / Network Status / Bluetooth Nearby: on-device and local-network facts at a glance
Honest about measurement limits:
We don't invent precision. Light is an estimate derived from camera exposure. Optical RPM is experimental. Sound shows a relative digital level, not a calibrated SPL meter. Fastener detection is a magnetic-anomaly reference only — not a wire finder or distance tool. Every result is labeled with its method and confidence, so you always know what it can and cannot tell you.
Built for comparison:
Save two measurements of the same kind and see the delta and percent change side by side. Archive records into projects and revisit before/after data anytime. Comparison results and measurement details can be exported as PDF diagnostic reports or CSV data for filing and collaboration.
Privacy-first by design:
No account registration. Your measurement records, captures, and settings stay on your device by default. The app contains no advertising SDKs and no third-party analytics or crash reporting, and it never tracks you across apps.
Unlock InstruKit Pro:
- Unlimited saving of measurement records, projects, and comparisons
- Export PDF diagnostic reports and CSV data
- Share measurement cards as images
Subscriptions auto-renew (monthly or yearly; yearly includes a 7-day free trial), or choose the one-time lifetime purchase. Manage or cancel anytime in iPhone "Settings → [Your Name] → Subscriptions"; benefits remain until the end of the current period.
Terms of Use (EULA):
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
What's New
· Refreshed the Home screen and instrument displays, with consistent tactile controls across the tools.
· Fixed missing or briefly incorrect light readings on launch and when switching cameras. Estimated illuminance appears once camera exposure is ready.
· The screen ruler now starts along the left edge. Flashlight modes include steady, SOS, Morse, breathing, and frequency.
· Optionally sync saved measurements, recording traces, projects, and comparisons through iCloud. Saved photos and recognition results have a separate sync option.
· Improved localized screens and Settings navigation, and fixed repeated photo saves and resuming sound measurements after switching modes.
The developer, 辉 曾, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 辉 曾
- Size
- 14.8 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 13 more
- English, Arabic, French, German, Hindi, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish, Traditional Chinese, Turkish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Pro Yearly $24.99
- Pro Monthly $3.99
- Lifetime $79.99
- Copyright
- © 2026 Hui Zeng