Zero Note vs Basalt Cobalt
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Zero Note
Securely share encrypted notes that automatically disappear after being read or based on custom rules. Options include self-destruction by views or time, location-based access control, and email notifications upon opening. Access notes from any device via a keyboard extension.
- Self-destruct by views
- Self-destruct by time
- Location-based access control
- Email notifications on opening
- Keyboard extension access
- Audit trail
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Zero note: Self-destruct shareable encrypted notes Think of it's a way to share one time secrets, one time confidential notes with others that disappears after its been read or based on your self-destruct rules. A secure way to share a private encrypted note that self-destruct automatically based on your own terms: 1. Self-destruct by views 2. Self-destruct by time 3. Whitelist by location, country or anywhere 4. Get notified by email when it is opened by the recipient 5. Accèss Zero Note from anywhere using the keyboard extension. 6. Audit Trail note when it was first seen and last seen.
Basalt Cobalt
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Most smartphone users carry at least three or four recurring subscriptions they signed up for months ago and have since forgotten about. Some of these are still worth paying for. Others have quietly outlived their usefulness while continuing to drain your account every billing cycle. This app exists to make the distinction visible and actionable. It tracks all your recurring charges in one place, flags the ones that have not been actively used recently, and presents your full subscription landscape in a format that makes comparison and decision-making straightforward. The goal is not to eliminate subscriptions — it is to make sure every one you keep is one you would actively choose to start again today if you were starting from scratch. Use it once a month, or whenever you notice your bank balance falling faster than expected.
Screenshots
Verdict
The clearest difference is in-app purchases: Basalt Cobalt at none against Zero Note's 2. Basalt Cobalt also leads on iOS requirement (15.0 vs 18.0). Zero Note's advantage is ads (none vs shown). On price 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. Zero Note sells 2 one-off in-app purchases. Basalt Cobalt asks for nothing beyond the download.
| Parameter | Zero Note | Basalt Cobalt |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 3 days | — |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 18.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 13 MB | 15 MB |
| Age rating | 17+ | 4+ |
| Developer | Pradeep Burugu | Jeneta Rose King |
In-app purchases
Zero Note
- Zero Note Lifetime Basic$9.99
- Zero Note Lifetime Pro$12.99
Basalt Cobalt
No in-app purchases









