What does Hush do, and is it safe?

Quick answer

Hush is an Android app that gives you per-SIM rules for calls, SMS, and notifications, so a work line can go quiet after hours while a personal line stays fully active. It needs the phone, SMS, contacts, and notification permissions to work. It does not record calls or messages and does not require an account. Hush is free to try, and after the trial requires a paid license, available as a subscription or a one-time purchase via Google Play.

What Hush actually does

Hush sits between Android and your two SIMs and decides, in real time, which incoming calls, SMS messages, and notifications should reach you.

For each SIM you can:

• Set a rule that quiets the line on a schedule (for example, work SIM silent from 19:00 to 08:00 on weekdays).
• Combine that schedule with other triggers like Wi-Fi presence or week-based patterns where your device supports it.
• Build an allowlist of contacts whose calls always ring through, even during quiet hours.
• Decide how unknown callers are handled per line (block, send to voicemail, or let through).
• Filter notifications from specific apps on a given line during personal time.

The point is asymmetry. Most "Do Not Disturb" tools treat the phone as one thing. Hush treats it as two lines that can follow different rules.

What Hush does not do

Trust comes from being clear about what an app cannot do, not only what it can.

• Hush cannot block calls before they reach the network. It works inside Android, so the call has to come into your phone before Hush can decide what to do with it. Carrier-level blocking is a separate question.
• Hush does not record calls or SMS content. Rules look at metadata: which SIM, which number, what time, whether the contact is on an allowlist. The body of an SMS is not read for the purpose of filtering, and call audio is never captured.
• Hush does not create an account or upload your data. There is no sign-in. Rules live on the device.
• Hush cannot guarantee zero spam. Spam reduction depends on Android's own caller identification and what your carrier exposes. Hush makes filtering better. It does not make it perfect.
• Hush does not promise feature parity across every Android phone. Some controls depend on your OS version and your carrier. The honest answer to "will every feature work on my exact phone" is "most will, some may not, and the app is upfront about which features the device supports during setup."

The permissions Hush asks for, and why

If a permission prompt feels intrusive without explanation, it is reasonable to refuse. Here is what Hush asks for and the reason in each case.

• Phone access. Required so Hush can see incoming calls, identify which SIM the call arrived on, and apply the rule for that line. Without this, per-SIM call rules are impossible.
• SMS access. Required so Hush can apply rules to incoming SMS the same way it does to calls. Without this, the SMS side of per-SIM rules cannot work.
• Contacts access. Required so allowlists can match by contact identity, not only by phone number. This is what lets a rule like "let calls from my manager through during work quiet hours" survive a phone change.
• Notification access. Required so Hush can filter notifications coming from apps on a given line during personal time. Android explicitly asks the user to grant this in its own settings, separate from a normal install permission.
• Optional: Wi-Fi state. Used only if you build a rule that triggers on Wi-Fi presence (for example, "go quiet whenever I am on the office Wi-Fi"). Not required for basic time-based rules.

The pattern is the same in each case. The permission exists because a specific feature cannot work without it, not because the app is fishing for data.

What Hush costs

Hush is free to install. On first launch you get a free trial of the full feature set. After the trial, continued use requires a paid license. You choose between two options: a recurring subscription, or a one-time purchase. Both are billed through Google Play.

There is no separate Hush account. If you go with the subscription, it lives in the Google Play subscriptions view on your phone and is cancellable in one tap. If you go with the one-time purchase, you own the license and there are no further charges.

For the current pricing in your region, see the Hush product page or open the in-app purchase screen. We keep the price visible in those two places rather than hard-coding it here so this article stays accurate.

How your data is handled

The full legal version is on the Hush privacy page. The short version is:

• Rules and allowlists are stored on the device. They are not uploaded to a server.
• Hush does not create an account, so there is no user profile to leak.
• The app uses the permissions listed above only for the features they enable. Phone and SMS access are not used to read the content of your communications.
• Crash and basic anonymous diagnostic information may be sent to keep the app working, the same as most apps on the Play Store. This is described in detail in the privacy page.

If you have a specific data question that the privacy page does not answer, the contact form on this site is the right place to ask.

Who Hush is for

Hush is the right choice if any of these match you:

• You carry two SIMs on one Android phone and want them to behave differently.
• You finish work at a known time most days but your work line does not respect it.
• You want some colleagues to be able to reach you after hours, but not all of them.
• You have tried Do Not Disturb and found it blocks too much, or not enough.
• You want behaviour to follow more than a clock, for example "quiet on office Wi-Fi" or "quiet on weekends."

Who Hush is not for

Honest negative cases matter.

• You only have one SIM. The whole design is about per-SIM asymmetry. With one line, native Android Do Not Disturb covers the same need.
• You are on iOS. Hush is Android only. The same problem exists on iOS but it is a different product surface.
• You need pre-network call blocking (for example, blocking robocalls before they ring). That is a carrier feature, not an app feature.
• You want a single magic toggle that silences everything. The setup is intentional: rules, allowlists, scenarios. Worth ten minutes upfront, not for someone who wants zero configuration.

FAQ

Is Hush a scam or fake app? No. Hush is published by Appfinity, a studio based in Amsterdam. The Play Store listing has been live since May 2021, the privacy page is hosted on this domain, and the company can be contacted directly through the contact form on this site.

Does Hush read my text messages? No. SMS permission is used to detect incoming messages so per-SIM rules can apply. The content of the messages is not read or stored by the app.

Can I use Hush without giving phone permission? Not in a meaningful way. Phone permission is what lets Hush see which SIM a call came in on. Without it, per-SIM call rules are impossible. You can refuse the permission, but the call side of the app will not work.

Does Hush drain the battery? Hush runs as a system service so it can react to incoming calls. The battery impact in normal use is small. If you ever see Hush near the top of your battery list, please contact us, that usually points to a configuration issue we can help fix.

Can I get a refund if it does not work on my phone? Yes. Both the subscription and the one-time purchase follow Google Play's standard refund policy. The free trial gives you a window to confirm Hush works on your device before any charge is made. If you are already paying and a feature stops working after an Android update, contact us.

What is the difference between Hush and Android's built-in Do Not Disturb? Built-in Do Not Disturb is a single setting that applies to the whole phone. Hush applies different rules to different SIMs and can combine schedules with other triggers like Wi-Fi or week patterns. If you only have one SIM, built-in Do Not Disturb is usually enough. If you have two and want them to behave differently, Hush is built for that.