Comparison

Luminometer vs ECO

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Luminometer

Transform your device into a professional light meter to measure luminosity in lux and foot-candles. Achieve optimal illumination for any space, from greenhouses to workspaces, ensuring comfort and preventing glare. Calibrated with reference equipment for precise and reliable readings.

Highlights
  • Measures lux and foot-candle units
  • Internal Exposure Compensation for accuracy
  • Camera view for measured area
  • Calibrated with reference equipment
  • Versatile for various lighting conditions
  • Helps set optimal illumination levels
Features
Read full description

Luminometer is an exceptional app that is designed to transform your iPhone or iPad into a professional and user-friendly light meter. It is based on Internal Exposure Compensation, which makes it the most accurate lux meter available on the market today. With Luminometer, you can easily measure the lux of any light source in both lx and foot-candle units without having to spend any money on professional equipment. One of the standout features of Luminometer is the ability to swiftly and efficiently set up your greenhouse, living room, workplace, study room, or any other area with the perfect level of illumination. Our app ensures that you achieve a well-lit environment that is comfortable to work in without causing any unnecessary glare. The app is incredibly versatile, making it consistent for use in various lighting conditions such as plant lighting, household lighting, workstation lighting, and mood lighting. No matter the type of lighting you need to measure, Luminometer is up to the task. With Luminometer, you get a comprehensive set of features that enable you to measure lux with ease. The camera view feature allows you to view the area being measured, making it even more user-friendly. The app is calibrated using top reference equipment, ensuring that your measurements are always precise and reliable. Whether you're dealing with ambient indoor and outdoor lighting or task and accent lighting, Luminometer has you covered. You can trust that our app is accurate and reliable, thanks to our calibration process, which is done using the best reference equipment available. In conclusion, if you're looking for an accurate, versatile, and easy-to-use light meter app, then Luminometer is the perfect solution for you. Get started today and experience the benefits of using our app to achieve the perfect level of illumination for any environment. Terms and pricing: Our weekly subscription costs $3.99 USD/week and provides you with unlimited access to premium features, as long as your subscription remains active. The subscription automatically renews, and payment will be charged to your iTunes account when you confirm the initial purchase. If you do not wish to renew your subscription, you may turn off the auto-renewal option in your Account Settings at least 24-hours before the current subscription period ends. For more information, please refer to our terms of service available at https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ or privacy policy on https://27groupts.notion.site/Privacy-Policy-for-Luminometer-iOS-App-68f7e665c2924108a9111eae825e53c7

About

ECO

Features
Read full description

ECO-Link Pro 是一款功能強大、操作簡便的智慧設備管理應用,讓您高效掌控燈光等各類智慧裝置。 主要功能包含: 群組控制:輕鬆管理多個設備,一鍵同步操作更省時。 情境控制:依照您的生活習慣預設多種情境,自由切換,智慧又便利。 定時控制:設定自動排程,讓設備準時啟動或關閉,節能又安心。 能耗數據展示:即時查看用電狀況,幫助您掌握能源使用,實現節能目標。 設備故障警示:即時推播異常訊息,確保設備安全運行無虞。 ECO-Link Pro,讓智慧生活更輕鬆!

Screenshots

Luminometer3 screens
ECO3 screens

Verdict

The call

The clearest difference is in-app purchases: ECO at none against Luminometer's 2. ECO also leads on ads (none vs shown) and iOS requirement (13.0 vs 16.6). Luminometer's advantage is update cadence (every 2 months vs every 10 months). On price and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Luminometer sells 2 in-app purchases, starting at $2.99 per 7 days. ECO asks for nothing beyond the download.

UpkeepUpdate frequency

Luminometer ships an update every 2 months, ECO every 10 months. Both last shipped on October 24, 2026.

Scorecard4 real differences · 6 level
Luminometer versus ECO: the parameters behind the verdict, then further details
ParameterLuminometerECO
PriceFreeFree
Rating3.5 (16 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings16 — better—
Update frequencyEvery 2 months — betterEvery 10 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.613.0 — better
Further details — not scored
Size14 MB41 MB
Age rating4+17+
Developer27GROUPCHIH BIN CHEN

In-app purchases

2 purchases

Luminometer

Subscriptions1
  • Weekly$2.997 Days
One-time1
  • Lifetime$9.99
None

ECO

No in-app purchases

Questions

Is Luminometer free?
Luminometer is free to download, with in-app purchases available.
Is ECO free?
ECO is free to download, with no in-app purchases.
Do Luminometer or ECO have ads?
Luminometer shows ads; ECO does not.
Which is updated more often, Luminometer or ECO?
Luminometer ships an update every 2 months, and ECO every 10 months. Most recently, Luminometer was updated on October 24, 2026 and ECO on October 24, 2026.

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