Privacy Policy — Chisel AI Writing Keyboard

Last updated: 3 July 2026

Chisel is built privacy-first. The short version: **Chisel does not collect,

store, or transmit any of your personal data. Nothing you type ever leaves your

iPhone.** This policy explains exactly how, and what the few technical

permissions actually do.

The short version

• No data collection. We collect nothing — not your text, not your usage,

not your identity.

• No servers, no network. Chisel has no backend. The app makes no network

calls. It works fully in Airplane Mode.

• No accounts. You never sign in. There is no login, email, or profile.
• No tracking, no analytics, no advertising. We include no third-party SDKs

for any of these.

• No microphone. Chisel never accesses the microphone.
• On-device AI. All rewriting, proofreading, translation and the keyboard

assistant run locally using Apple's on-device Foundation Model. Your text is

processed on your iPhone and is never sent anywhere.

What Chisel does with your text

When you use an AI feature (Proofread, Rewrite, Translate, Autocomplete, or the

Assistant), the relevant text is passed to **Apple's on-device Foundation

Model**, which runs entirely on your iPhone. The result is returned to the text

field. **Your text is not uploaded, logged, or retained by Chisel or by anyone

else.** When you close the keyboard, the text of that session is not kept —

with one exception you fully control: the assistant's memory, described below.

The text you type is never stored by Chisel beyond what iOS temporarily holds

in the active text field, which you already control.

Assistant memory

After a conversation with the keyboard assistant, Chisel may extract **durable

facts you told it about yourself** (for example your name, occupation, or a

language you're learning) so the assistant can remember you next time. This

happens entirely on your iPhone, using the same on-device model:

• The facts are stored only on your device, in the app's private storage.

They are never uploaded — Chisel has no servers to upload them to.

• You can see, edit, and delete every fact at any time in

Settings → Assistant memory, including a one-tap "Forget everything".

• Deleting the app deletes all of it.

Data stored on your device (and only your device)

Chisel saves a small amount of information locally, in your app's private

storage (an iOS "App Group" container). This data never leaves your device

and is not accessible to us or anyone else:

• Your settings (keyboard preferences, chosen skin, translate defaults).
• Your custom keyboard skins, if you create any.
• Your recently used emoji.
• The assistant's memory of you (see above) — viewable and erasable in the app.
• Whether you've purchased the one-time unlock, and the free tier's

usage counters.

This uses the standard iOS UserDefaults API, declared to Apple under the

"required reason" category CA92.1 (accessing the app's own group container).

You can erase all of it at any time by deleting the app.

Purchases

Chisel offers one optional in-app purchase (a one-time unlock for the AI

features). Payment is handled entirely by Apple through the App Store using

StoreKit. Chisel never sees your payment details, card, or Apple ID. We only

receive, on-device, a yes/no signal from Apple about whether the unlock has been

purchased. Refunds and receipts are managed by Apple.

Full Access ("Enhanced Mode") — optional

iOS lets you grant a keyboard "Full Access". In Chisel this is **off by

default** and entirely your choice. It is used only to:

• enable key vibration (iOS blocks keyboard haptics without it), and
• translate text you explicitly copy, when you tap the "Copied" chip.

**Even with Full Access enabled, Chisel still makes no network calls and sends

nothing anywhere.** The clipboard is read only at the moment you tap the button —

never in the background. If you never enable Full Access, every feature except

vibration still works.

Voice

The keyboard assistant can read its replies aloud using Apple's built-in

text-to-speech voices (AVSpeechSynthesizer), which run on-device. This is

audio output only. Chisel does not and cannot record audio or use the

microphone.

Children

Chisel is rated 4+ and is safe for all ages. It collects no personal data from

anyone, including children.

Third parties

Chisel uses no third-party analytics, advertising, or data-sharing services.

The only external party involved is Apple, which provides the on-device AI

model, the text-to-speech voices, and App Store payment — all governed by

[Apple's own privacy policy](https://www.apple.com/legal/privacy/).

Changes to this policy

If this policy ever changes, the updated version will be posted here with a new

"Last updated" date. Because Chisel collects no data, we do not anticipate

material changes.

Contact

Questions about privacy? Email: cezarbroscaru@gmail.com

Contact: cezarbroscaru@gmail.com