Comparison

TelinkSigMesh vs Light Meter LM

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

Head to head
About

TelinkSigMesh

Features
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1.支持GATT模式添加设备; 2.支持GATT模式升级设备; 3.支持控制单个设备的开关、亮度、色温、RGB、level; 4.支持给设备添加组号、删除组号,并通过组号同时控制多设备的开关、亮度、色温、RGB; 5.支持给设备添加闹钟; 6.支持给设备添加场景; 7.支持给设备添加多个NetKey和appk,并且可以切换不同的Key进行数据发送; 8.支持发送自定义指令; 9.支持通过二维码或者文件分享的方式分享mesh网络数据。 10.支持多网络管理功能。 11.支持 mesh V1.1 的所有功能,主要包含: - enhance provision auth:组网认证增强。 - remote provision:把距离provisioner一跳及多跳的未配网设备都能添加到网络中。 - device firmware update:通过mesh方式对多个节点同时进行固件升级。 - directed forwarding:路由功能。 - certificate-base provisioning:基于证书认证的组网模式。 - private beacons:私有信标。 - subnet bridge:子网桥接。 - Opcodes Aggregator:多个消息组合成一条消息的功能。 - NLC profiles: Network Lighting Control profiles。

About

Light Meter LM

Transform your smartphone into a professional light meter. Measure illuminance and color temperature with scientifically validated accuracy, trusted by professionals. Requires a simple diffuser for precise readings.

Highlights
  • Measure illuminance (lux/foot-candle)
  • Measure color temperature (Kelvin)
  • Industry-leading accuracy
  • Pre-calibrated for your device
  • Low light sensitivity
  • Save peak reading
  • Custom calibration option
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Turn your smartphone into a professional-grade light meter. Measure illuminance (lux/foot-candle) and color temperature (CCT in Kelvin) with unmatched accuracy — trusted by photographers, engineers, and lighting professionals worldwide. Why waste money on a hardware meter when you’re already carrying one in your pocket? The LM-3000 offers the same quality and usability as a traditional hardware light meter. Developed by optics scientists at the Zurich University of Applied Sciences, LM-3000 is the only light meter app scientifically validated for accuracy. It achieves professional-grade precision by leveraging your iPhone's front-facing camera sensor with advanced RAW image processing. Unlike relying on estimates like other apps, it adheres to the ISO/CIE 19476 standard, ensuring measurements you can trust for critical applications. MEASUREMENTS ⎷ Illuminance in lux or foot-candles ⎷ Correlated color temperature in kelvin FEATURES ⎷ Industry-leading accuracy, matching professional high-end lux meters ⎷ Pre-calibrated for your specific device ⎷ Excellent low light sensitivity to detect light pollution ⎷ No ads ⎷ No Bluetooth and location permission required ⎷ In-app manual ⎷ Save peak reading ⎷ HOLD function with acoustic signal ⎷ Custom calibration option to align readings to another meter DIFFUSER REQUIRED Like every real light meter, the LM-3000 requires a diffuser to measure accurately. A diffuser scatters incoming light evenly on the sensor and prevents hotspots. While it may sound complex, the solution is surprisingly easy. You have two options: 1) Easily build a diffuser yourself in less than a minute using standard printer paper. This is accurate enough for most use cases. 2) Get the dedicated Diffuser Accessory (free worldwide shipping) for best accuracy and convenience. More details on https://lightray.io/diffuser/ (!) Avoid apps that don’t require a diffuser! They are inaccurate because they ignore the basic physics of light measurement. TRY BEFORE YOU BUY The LM-3000 is free to download and comes with a free trial period. The trial period lasts for two non-consecutive days, giving you enough time to see if the app fits your needs. The status of your free trial will be shown as the "battery level" on the top right of the LM-3000's display and on the "Battery Status" screen. Once your light meter's "battery" is depleted, you may choose a Charging Option to keep using the app. You can pick what works best for you: → Single Charge — top-up for another 48 hours (perfect for occasional use), → Continuous Charging — a monthly subscription (great if you use it regularly), → Unlimited Battery — a one-time purchase for unlimited lifetime access LM-3000 is the result of over five years of dedicated research and development, ensuring you get a tool that is precise and reliable. Every in-app purchase supports future development and helps keep the app ad-free for everyone. As a member of 1% for the Planet, we donate at least one percent of all revenue to environmental non-profits — this is our way of giving back. ACCURACY Accuracy is not an afterthought — Apps developed by Lightray Innovation are developed according to the ISO/CIE 19476 standard. Thanks to RAW image processing and a default calibration per device model they’re able to match the performance of high quality traditional hardware light meters. To ensure quality we rigorously test our apps regularly on upcoming devices. DOWNLOAD FOR FREE. TRUSTED BY MILLIONS. LM-3000 is the go-to light meter for photographers, professionals, engineers, and lighting enthusiasts who rely on accurate measurements — not estimates or guesswork. Download for free today and experience the difference! See the app in action: https://youtu.be/EJW7NfE2qCk Terms and Conditions: https://lightray.io/lightmeter/terms/

Screenshots

TelinkSigMesh4 screens
Light Meter LM4 screens

Verdict

The call

The clearest difference is in-app purchases: TelinkSigMesh at none against Light Meter LM's 3. TelinkSigMesh also leads on iOS requirement (12.0 vs 15.0). Light Meter LM's advantage is update cadence (monthly vs every 6 months). On price, ads 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. Light Meter LM sells 3 in-app purchases, starting at $3.49 per month. TelinkSigMesh asks for nothing beyond the download.

UpkeepUpdate frequency

TelinkSigMesh ships an update every 6 months, Light Meter LM monthly. The most recent releases landed on October 27, 2026 and October 29, 2026 respectively.

Scorecard3 real differences · 7 level
TelinkSigMesh versus Light Meter LM: the parameters behind the verdict, then further details
ParameterTelinkSigMeshLight Meter LM
PriceFreeFree
Rating—4.5 (2.6K ratings) — better
Positive reviews—40.4% of reviews
Number of ratings—2.6K — better
Update frequencyEvery 6 monthsMonthly — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.0
Further details — not scored
Size16 MB22 MB
Age rating4+4+
DeveloperTelink Micro LLCLightray Innovation GmbH

Bugs and requests

TelinkSigMesh

Not enough reviews yet to summarise bugs or requests.

Light Meter LM

Reported bugs

3 issues
  • Diffuser not recognized even when used
  • App locks up/crashes
  • Constant diffuser pop-up interruptions

Requested features

3 requests
  • Ability to use rear camera
  • More flexible diffuser options
  • Improved accuracy without diffuser

In-app purchases

None

TelinkSigMesh

No in-app purchases

3 purchases

Light Meter LM

Subscriptions1
  • Continuous Charging$3.491 Month
One-time2
  • Single Charge$0.99
  • Unlimited Battery$19.99

Questions

Is TelinkSigMesh free?
TelinkSigMesh is free to download, with no in-app purchases.
Is Light Meter LM free?
Light Meter LM is free to download, with in-app purchases available.
Do TelinkSigMesh or Light Meter LM have ads?
Neither TelinkSigMesh nor Light Meter LM shows ads.
Which is updated more often, TelinkSigMesh or Light Meter LM?
TelinkSigMesh ships an update every 6 months, and Light Meter LM monthly. Most recently, TelinkSigMesh was updated on October 27, 2026 and Light Meter LM on October 29, 2026.

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