GVM LED vs VellumCG
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GVM LED
Control photography lamps via Bluetooth connection. Adjust settings and manage your lighting equipment directly from your mobile device.
- Bluetooth lamp control
- Photography lighting management
- App-controlled lighting
- GVM product integration
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This is a software that can control the photography lamp. The app controls the photography lamp product with app function under GVM through Bluetooth connection.
VellumCG
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VellumCG is the mobile control surface for live-TV character graphics — lower-third stripes, supers, on-screen credits, phoner boxes, full-frame social/WhatsApp cards, and memorial cards, all aired straight from an iPad or iPhone. It's the companion client to a VellumCG server: the broadcast graphics engine your organization already runs in its control room. VellumCG doesn't replace that server — it puts a fast, focused operator console for it in your hand, so a producer or director can build and air a graphic from the studio floor, a remote truck, or the newsroom without walking back to a desk. FEATURES • Stripe editor — build and air lower-third name/title bars in seconds • Super — full-screen name/title cards for interviews and panels • Credits — on-screen production credits • Phoner — up to three simultaneous phone/remote-guest boxes, slot-based so on-air state stays consistent across every operator • Socials — air X, Facebook, Instagram, LinkedIn, and Truth Social posts as full-frame cards • WhatsApp — pull in and air media shared to your newsroom's WhatsApp workflow • Memorial cards — full-frame tribute cards with photo, rank, name, and title • Playlists — queue and cue graphics ahead of air, then take them live with one tap • Journalist Mode — a self-serve landscape view for on-air talent, with tap-to-air playlist control and a live preview of the actual broadcast output • Bilingual (English/Hebrew) interface with automatic text direction per field • Real-time sync — every change is mirrored instantly to every connected operator and to the live broadcast output HOW LOGIN WORKS VellumCG is server-agnostic, like a workspace-based tool. On first launch you enter your organization's VellumCG server address (its "hub URL") and an operator secret provided by your organization. Every template, playlist, and piece of on-air state is fetched live from that server — nothing is hardcoded to a single broadcaster. Requires a VellumCG server account: this app has no public sign-up, no guest mode, and nothing to explore without one, because it is a professional tool built for TV control rooms, not a consumer app. WHO IT'S FOR VellumCG is built for broadcast operators, producers, and directors running character graphics in a live TV control room — not for general audiences.
Screenshots
Verdict
The clearest difference is iOS requirement: GVM LED at 13.0 against VellumCG's 16.4. On price, update cadence, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.
| Parameter | GVM LED | VellumCG |
|---|---|---|
| Price | Free | Free |
| Rating | 3.2 (5 ratings) — better | — |
| Positive reviews | 21.7% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 49 MB | 48 MB |
| Age rating | 4+ | 4+ |
| Developer | 丹丹 陈 | Jeremie Quenet |
Bugs and requests
GVM LED
Reported bugs
12 issues- Login credentials rejected despite correct password
- Verification code times out before use
- App crashes during device synchronization
- Cannot connect more than one light at a time
- Bluetooth connection drops unexpectedly
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- App freezes on main page or navigation tabs
- Password matching validation fails despite identical entries
- Login fails when using non-.com email addresses
- App requires WiFi for login despite Bluetooth-only operation
- In-app message/problem form always returns 'FAILED' status
- Incompatibility with iPad Pro color adjustment
- Recent update broke previously working connections
Requested features
10 requests- Remove mandatory login requirement for local Bluetooth control
- Enable independent control of multiple lights simultaneously
- Expand scene customization options beyond 8 presets
- Add keyboard shortcuts and Stream Deck integration for streaming
- Improve color wheel with more granular color selection
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- Add dark mode option
- Create desktop/PC version with better controls
- Allow grouping of lights for synchronized control
- Implement offline mode for Bluetooth-only operation
- Add light naming persistence across app sessions
VellumCG
Not enough reviews yet to summarise bugs or requests.
In-app purchases
GVM LED
No in-app purchases
VellumCG
No in-app purchases









