LSD BELL vs Quad Notes
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
LSD BELL
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Wired WiFi video doorbell connects to network via wireless router or network cable Mobile devices include smartphone or tablet,could connect to the doorbell,After the vistor rings,mobile devices could interact with doorbell via real time video and audio ,user can view the vistor, the decide th whether intercom or open the door etc.
Quad Notes
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Displays four notes in a grid.
Screenshots
Verdict
The clearest difference is ads: LSD BELL at none against Quad Notes's shown. LSD BELL also leads on iOS requirement (8.0 vs 15.8.3). On price, update cadence, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
LSD BELL ships an update every 9 days, Quad Notes every 2 weeks. The most recent releases landed on October 17, 2026 and October 10, 2026 respectively.
| Parameter | LSD BELL | Quad Notes |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 9 days — better | Every 2 weeks |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 8.0 — better | 15.8.3 |
| Further details — not scored | ||
| Size | 33 MB | 37 MB |
| Age rating | 4+ | 4+ |
| Developer | god zhou | Hideaki Uchikoshi |
In-app purchases
LSD BELL
No in-app purchases
Quad Notes
No in-app purchases
Questions
Is LSD BELL free?
Is Quad Notes free?
Do LSD BELL or Quad Notes have ads?
Which is updated more often, LSD BELL or Quad Notes?
Other comparisons
