Epion vs SEKONIC LD
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Epion
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Epion helps you monitor air quality in the office and at home. Use the app to connect your Epion Air to the local WiFi-network and view the collected statistics no matter where you are. Onze app maakt gebruik van enkele permissies: - Internet: de app zal verbinding maken met de systemen van Epion om je apparaten op te halen en informatie te tonen. - Camera: deze wordt enkel gebruikt om bij het toevoegen van een nieuw apparaat de QR-code op het apparaat te scannen. - Bluetooth, Locatie: de app zal met het apparaat verbinden over Bluetooth om de instellingen door te geven. Dit kan in principe gebruikt worden om je locatie te bepalen waardoor ook de 'locatie' permissie gevraagd kan worden. Onze app maakt enkel gebruik van Bluetooth wanneer je een apparaat aan het toevoegen bent, wij slaan geen locatiegegevens op.
SEKONIC LD
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With SEKONIC LD, you can use the full functionality of the spectrometer C-4000. You can remotely control the C-4000 via Bluetooth and view graphs of measurement data in various way. It displays illuminance (lux or foot-candle), deviation (βΏuv), color temperature (K), color rendering index (CRI/TM-30), and CIE1931 chromaticity coordinates (x,y). and imports stored data from the C-4000. SEKONIC LD offers upgrade option with in-app purchases (3-month subscription, 12-month subscription), including a 2-week free trial. With the upgrade, you can import drawings such as lighting layouts or site photos, and link measured values directly on them. Even if you stop the measurement midway, you can add notes to the saved data, making it convenient for multiple measurements. You can also attach smartphone images and notes to each measurement data. Location information of sites can also be attached with GPS data. Compile project data into simple reports, output as PDFs, or export as CSVs for further processing. License Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: Epion at none against SEKONIC LD's 2. Epion also leads on update cadence (monthly vs every 9 months) and iOS requirement (14.0 vs 16.0). On price, ads and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. SEKONIC LD sells 2 in-app purchases, starting at $49.99 per 3 months. Epion asks for nothing beyond the download.
Epion ships an update monthly, SEKONIC LD every 9 months. The most recent releases landed on October 25, 2026 and October 3, 2026 respectively.
| Parameter | Epion | SEKONIC LD |
|---|---|---|
| Price | Free | Free |
| Update frequency | Monthly β better | Every 9 months |
| Ads | No | No |
| In-app purchases | No β better | Yes |
| Devices | iPhone, iPad, iPod β better | iPhone, iPad |
| Requires iOS | 14.0 β better | 16.0 |
| Further details β not scored | ||
| Size | 26 MB | 33 MB |
| Age rating | 4+ | 4+ |
| Developer | SenseZo B.V. | Sekonic |
In-app purchases
Epion
No in-app purchases
SEKONIC LD
- 3 months subscription14 Days trial$49.993 Months
- 12 months subscription14 Days trial$119.991 Year









