ND Filter EV vs CosmoViewer
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
ND Filter EV
Read full descriptionHide full description
This is a calculator for photographing using ND (Neutral-density) filters with any number of stops. ND STOPS lets you set the exposure without ND filter in a blue field, and see the result below. EV ALTERNATIVES gives you a dual combo alternatives of ISO, APERTURE and SHUTTER SPEED SWEET SPOTS is not always accurate, but in many cases lenses has its sweet spot at about 40% up on the aperture range. SETTINGS lets you choose which stops you want to see in the ND STOPS PAGE and at what EV (exposure value) interval in all pages. To see more apps like this, go to www.discobajas.com
CosmoViewer
Read full descriptionHide full description
CosmoViewerNG is a companion viewer and control app for Cosmostreamer devices. Connect your iPhone or iPad to the same local network as your device, discover it automatically, or enter its host address manually. Once connected, CosmoViewerNG displays the live video stream, camera status, telemetry, and device controls in a fullscreen interface. Features: - Automatic local network discovery - Manual connection by host, IP address, or port - Live video viewing with support for primary and secondary streams - Camera overlay with recording status, exposure values, storage status, and telemetry - Device settings and configuration tools - Camera controls for supported Cosmostreamer device types - TestFlight-ready iPhone and iPad interface CosmoViewerNG is designed for users of Cosmostreamer devices and requires a supported device on the same network.
Screenshots
Verdict
The clearest difference is price: CosmoViewer at Free against ND Filter EV's $0.49. CosmoViewer also leads on update cadence (every 2 weeks vs every 4 months). ND Filter EV's advantage is iOS requirement (13.0 vs 17.0). On ads, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
CosmoViewer is free to download; ND Filter EV costs $0.49 up front. Neither carries in-app purchases, so what you see is what you pay.
ND Filter EV ships an update every 4 months, CosmoViewer every 2 weeks. The most recent releases landed on November 8, 2026 and November 5, 2026 respectively.
| Parameter | ND Filter EV | CosmoViewer |
|---|---|---|
| Price | $0.49 | Free โ better |
| Update frequency | Every 4 months | Every 2 weeks โ better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 13.0 โ better | 17.0 |
| Further details โ not scored | ||
| Size | 0 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Stein Erik Nilsen | Sergey Serov |
In-app purchases
ND Filter EV
No in-app purchases
CosmoViewer
No in-app purchases
Questions
Is ND Filter EV free?
Is CosmoViewer free?
Do ND Filter EV or CosmoViewer have ads?
Which is updated more often, ND Filter EV or CosmoViewer?
Other comparisons















