Prop Lot Size ("the App", "we", "us", or "our") is an iOS app developed by SignalDeck. This Privacy Policy explains what information the App does and does not handle.
The short version: your trading inputs never leave your device, on any tier. Balances, risk, stops, saved accounts, and custom firm rules stay on your phone — we never receive them. The free tier is ad-supported (Google AdMob), which, like most free apps, uses an advertising SDK that collects device-level data to serve ads; any paid plan removes ads and that SDK entirely. The optional Pro+ "Live" tier connects your MetaTrader 5 account through your SignalDeck account to auto-fill your live balance and drawdown.
1. Information We Collect
Your calculator data — never collected
On every tier, everything you type — balances, risk, stops, saved accounts, custom firm rules — stays on your device. There is no account or sign-in for the Free and Pro tiers, and we have no way to see or identify this data.
Advertising on the free tier
The free tier shows ads through Google AdMob. To serve them, the AdMob SDK collects device-level information such as an advertising identifier, device and network characteristics, and ad interactions. That data is collected and used by Google, governed by Google's Privacy Policy and how Google uses information from apps that use its services — we do not receive your trading inputs, and AdMob never has access to them. On first launch the App asks for App Tracking Transparency permission; declining limits ads to non-personalized. Subscribing to any paid plan removes all ads and the advertising SDK.
Pro+ "Live" tier (optional)
If you choose to connect a live MetaTrader 5 account, you sign in with your SignalDeck account, and the App retrieves your linked account's balance, equity, and drawdown from SignalDeck's backend to display in the calculator. This data flows between the App and SignalDeck's servers and is governed by SignalDeck's Privacy Policy. The App reads these values for display; it does not sell them or use them for advertising.
2. Network Access
The App makes network requests only to the following destinations:
- Google AdMob — on the free tier only, to request and display banner ads. Removed entirely on any paid plan.
- Apple's StoreKit / App Store endpoints — used solely to process and restore subscription purchases. Apple's own privacy policy governs this data; we never see your payment details.
- SignalDeck's backend — only on the Pro+ Live tier, and only after you sign in, to authenticate and read your linked MetaTrader 5 account's balance, equity, and drawdown.
The calculator itself — sizing, firm rules, and instrument data — is all bundled and runs entirely on-device; none of your inputs are sent anywhere. Aside from ads on the free tier, a paid app makes no network calls except Apple's purchase endpoints and, on Pro+ Live, your SignalDeck connection.
3. What's Stored on Your Device
Your saved account profiles, custom firm rules, and settings are stored locally on your device and never leave it. On the Pro+ Live tier, a SignalDeck authentication token is stored securely in the device Keychain so you don't have to sign in repeatedly. None of this is accessible to us except the account data you explicitly retrieve from SignalDeck on the Live tier.
4. No Broker Credentials
The App never asks for or stores your broker or MetaTrader login credentials, and it never contacts MetaApi or your broker directly. All live-account access on the Pro+ tier goes through SignalDeck's backend, which owns that integration.
5. Third-Party Services
The only third-party SDK in the App is Google AdMob, and it is present only to serve ads on the free tier — there is no analytics, no crash reporting, and no social login on any tier. A paid subscription removes AdMob entirely, leaving the App with no third-party SDKs at all.
6. Children's Privacy
The App is not directed at children and contains no features (chat, social, user-generated content) relevant to child safety. Because the free tier serves ads, the App is intended for adult traders, and AdMob is configured to request non-child-directed treatment.
7. Your Choices and Rights
To remove ads and the advertising SDK, subscribe to any paid plan. You can also limit ad personalization by declining the App Tracking Transparency prompt, or reset your advertising identifier in iOS Settings → Privacy & Security → Tracking / Apple Advertising. We hold no trading data about you to access, correct, delete, or export; uninstalling the App removes its local on-device data. If you use the Pro+ Live tier, your account data is managed through your SignalDeck account; see SignalDeck's Privacy Policy for the rights that apply to it. Manage or cancel a subscription directly through Apple (Settings → [your name] → Subscriptions).
8. Changes to This Policy
We may update this Privacy Policy if the App's data practices change. When we do, we will update the "Last updated" date at the top of this page and, for material changes, note it in the App Store "What's New" notes.
9. Contact
Questions about this policy? Reach us via our support page, our general contact page, or connect with us on LinkedIn.