Sub Zero Hero Contact support
Email us at app-contact@niftybits.app. We usually reply within a few working days, in English or German.
Useful when reporting a problem: your iPhone model, your iOS version and the Sub Zero Hero version (in iOS under Settings → General → iPhone Storage → Sub Zero Hero), plus a short description of what you did and what happened.
We have no access to your inventory and can neither see nor restore it. So please do not send us export files or screenshots with data we do not need.
Getting started
What do I need?
An iPhone running iOS 18 or later. There is no account with us. To sync between devices and share with others you need an Apple Account with iCloud; without iCloud the app works completely on this iPhone.
Someone wants to share their freezer with me.
On first launch, tap I was invited, then open the invitation link from Messages, Mail or WhatsApp. Do not set up a freezer of your own first — otherwise you end up with an empty second inventory, which the app then offers to delete.
iCloud and syncing
My changes do not show up on my other device.
On both devices, check in the app under Settings → iCloud that it says Syncing with iCloud. If it says Not signed in to iCloud, sign in to iCloud in the iOS settings and turn on iCloud Drive.
Both devices need to be signed in to the same Apple Account (or share the freezer) and be online. Syncing runs through Apple and can take anywhere from a few seconds to a few minutes. If the app shows an error there, send us its exact wording.
I am getting a new iPhone. How do I take my inventory with me?
With iCloud: sign in to the new iPhone with the same Apple Account and install the app — the inventory loads automatically.
Without iCloud: export the inventory on the old iPhone under Settings → Export my data and import the file on the new one with Import from Sub Zero Hero export. Note that importing replaces everything already in the app.
Sharing with your household
How do I invite someone?
In the app under Settings → Invite someone. You choose whether they can edit or only read. Everyone uses their own Apple Account; the data stays in the iCloud of the person the freezer belongs to and counts towards their storage.
I cannot invite anyone, or cannot change anything.
Only the person the freezer belongs to can invite others. If it was shared with you as Read only, ask the owner for editing access.
How do I stop sharing?
As the owner, under Settings → Manage sharing: remove individual people there, or stop sharing altogether. As an invited person, remove yourself under Settings → Sharing options.
Unlocking and purchases
What is free, and what costs money?
The first 20 items in the inventory are free, for good. Items under Restock do not count, and using something up makes room again. For as many items as you like, unlock the app with a one-time in-app purchase — no subscription. One purchase covers the whole household: the unlock applies to the whole freezer, so to everyone you share it with, family or flatmates. Through Family Sharing, the purchase also covers your family members.
I have already paid, but the app is not unlocked.
In the app under Settings → Unlock, tap Restore purchases. You need to be signed in with the Apple Account you bought it with. If it says Waiting for approval, the purchase still needs approving, for example through Ask to Buy in Family Sharing.
How do I get a refund?
Apple is the seller, not us — we see neither your payment nor your Apple Account. Request a refund directly from Apple at reportaproblem.apple.com.
Your data
Can you recover my data?
No. Your inventory lives on your iPhone and in your own iCloud; we have no access to it and no copy of it. If you want to be safe, export it now and then under Settings → Export my data.
How do I delete everything?
Under Settings → Delete all my data. This removes the inventory from this iPhone and from iCloud — including for anyone you share it with — and cannot be undone. Export it first if you want to keep a copy.
How do I change the language?
The app follows the iOS language. To change it for Sub Zero Hero alone, go to the iOS settings under Apps → Sub Zero Hero → Language; the app restarts when you do. English and German are available.
What happens to my data?
In short: we never get it. The details are in the privacy policy.