# Survi vs Light Meter LM

The clearest difference is rating: Light Meter LM at 4.5 against Survi's 1.8. Light Meter LM also leads on update cadence (monthly vs every 6 months) and ratings volume (2.6K vs 13). Survi's advantage is in-app purchases (none vs 3) and iOS requirement (10.0 vs 15.0). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. Light Meter LM sells 3 in-app purchases, starting at $3.49 per month. Survi asks for nothing beyond the download.

Light Meter LM holds the better App Store score, 4.5 against 1.8. That said, the two scores are not equally well evidenced: Light Meter LM has 2.6K ratings behind it against 13, so its average is the more settled of the two. Written reviews point the same way: 38% of Survi's written reviews are positive against 40% of Light Meter LM's.

Survi ships an update every 6 months, Light Meter LM monthly. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Survi | Light Meter LM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.8 (13 ratings)](https://appshunter.io/ios/app/survi/id1151206423/reviews) | **[4.5 (2.6K ratings)](https://appshunter.io/ios/app/light-meter-lm-3000/id1554264761/reviews)** |
| Number of ratings | 13 | **2.6K** |
| Positive reviews | 37.5% of reviews | **40.4% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Monthly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 23 MB | 22 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kim Berninger](https://appshunter.io/developer/1151206422) | [Lightray Innovation GmbH](https://appshunter.io/developer/1031383431) |

## What reviewers say

### Survi

[App page](https://appshunter.io/ios/app/survi/id1151206423)

Easily create polls directly within your messaging conversations. Facilitate group decisions on activities like movie choices or dinner plans without leaving your chat.

**Highlights:** Create polls in iMessage, Vote on options, Group decision making, Free to use

**In-app purchases:** none


### Light Meter LM

[App page](https://appshunter.io/ios/app/light-meter-lm-3000/id1554264761)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Continuous Charging | $3.49 | per month |
| Single Charge | $0.99 | one-time |
| Unlimited Battery | $19.99 | one-time |

**What reviewers like**

- 👍 Great app
- 👍 Accurate measurements
- 👍 Easy to use
- 👍 Helpful customer service
- 👍 Useful for science/research

**What reviewers complain about**

- 🐛 Requires diffuser for accurate readings
- 💰 Expensive for a light meter app
- 🔋 Battery/trial period issues
- 🔍 Inconsistent/inaccurate readings
- 🙄 Misleading/deceptive marketing

**Reported bugs**

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

**Requested features**

- Ability to use rear camera
- More flexible diffuser options
- Improved accuracy without diffuser


## Frequently asked questions

### Is Survi free?

Survi 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.

### Which has better reviews, Survi or Light Meter LM?

Light Meter LM is rated higher. Survi averages 1.8 out of 5 from 13 ratings, while Light Meter LM averages 4.5 from 2.6K ratings.

### Do Survi or Light Meter LM have ads?

Neither Survi nor Light Meter LM shows ads.

### Which is updated more often, Survi or Light Meter LM?

Survi ships an update every 6 months, and Light Meter LM monthly. Most recently, Survi was updated on November 2, 2026 and Light Meter LM on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*