# LIDA Meter — Professional Light Meter

> Professional Light Meter (iPhone/iPad app by SERDAR ERTEKIN.)

- Source: https://appshunter.io/ios/app/lida-meter/id6760695634 (this page in markdown: same URL + `.md`)
- Developer: [SERDAR ERTEKIN](https://appshunter.io/developer/1885781819)
- Category: Utilities, Photo & Video
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.1 · 41 MB
- Languages: American English
- Released: 2026-04-12
- Data updated: 2026-07-29
- User reviews in markdown: https://appshunter.io/ios/app/lida-meter/id6760695634/reviews.md

## What is LIDA Meter?

LIDA (Lighting Inspection & Diagnostic Application) measures the quality of lighting sources at a professional level using your smartphone camera.
MEASUREMENT MODULES:
▸ Flicker Analysis
Measures the flicker frequency, percentage, and flicker index of LED and fluorescent lamps using the camera's rolling shutter. Provides risk assessment according to IEEE 1789-2015.

▸ Color Temperature (CCT)
Calculates the color temperature in Kelvin using the McCamy formula. Covers the full range from warm white to cool daylight.

▸ Light Intensity (Lux)
Estimates ambient light levels from camera EXIF data.

▸ Color Rendering Index (CRI)
Evaluates how accurately a light source renders colors on a 0-100 scale.

KEY FEATURES:

• Fully on-device — no internet connection required
• FFT-based real-time signal processing (C++ native engine)
• IEEE 1789-2015 risk assessment (Low / Moderate / High)
• 7 languages: English, Turkish, Spanish, Arabic, German, French, Russian
• Dark theme interface

WHO IS IT FOR:

• Lighting engineers and inspectors
• Electrical and electronics technicians
• Interior designers and lighting designers
• Health and safety professionals
• Anyone interested in lighting quality

PREMIUM:

Free version includes unlimited measurements after watching ads, with up to 3 saved records. LIDA Premium removes all ads, enables offline usage, unlimited saved records, and sensor calibration — all with a one-time lifetime purchase.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| LIDA Premium | $4.99 | one-time |



## Version history (last 4 releases)

### 1.0.6 — 2026-04-19

Performance and stability improvements.

### 1.0.5 — 2026-04-15

• Full Inspection mode: Measure all lighting parameters (flicker, CCT, lux, CRI) sequentially in one session
• PDF report generation: Professional inspection reports with photos, QR codes, and standards-based recommendations
• Customized pass/fail criteria for 14 workspace types (office, hospital, classroom, industrial, etc.)
• Automatic risk assessment based on IEEE 1789-2015 standard
• GPS location tracking for geo-tagged inspections
• Operator name and location info support
• Performance improvements and bug fixes

### 1.0.4 — 2026-04-14

- In-app purchase issue fixed
- Bug fixes and improvements

### 1.0 — 2026-04-12

No release notes.

## Related topics

[flicker meter](https://appshunter.io/ios/topics/flicker-meter)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-29.*