RiskCalc support
Tell us what is wrong and we will fix it.
RiskCalc is made by a small independent studio. Email reaches the people who wrote the app. We read every message and aim to reply within two business days.
The basics
What do I need to run RiskCalc?
An iPhone running iOS 18 or later. There is no account, no sign-in, and no internet connection required. RiskCalc is free.
How does RiskCalc work out my position size?
It divides the dollars you are willing to lose by the loss per share if your stop is hit. With a $10,000 account risking 1%, your budget is $100. Entry 1.40 and stop 1.27 is a $0.13 loss per share, so $100 ÷ $0.13 = 769.2, which rounds down to 769 shares. RiskCalc always rounds down, so you never risk more than your budget.
How do I size a short?
Put your stop above your entry. RiskCalc reads a stop below entry as a long and a stop above entry as a short, and marks the result with an arrow so you can confirm it read it the way you meant.
How does the Options Calculator differ?
It sizes bought calls and puts by premium. One contract controls 100 shares, so a premium of 2.40 with a stop at 1.40 risks $100 per contract. Leave the stop blank to treat the whole premium as the risk. Selling options is not supported, because a short option has no fixed maximum loss to size against.
What are the 1R, 2R and 3R targets?
R is the amount you risk per share. A 2R target is the price where your gain equals twice that risk. If you enter a take-profit price, RiskCalc also shows its reward-to-risk ratio, such as 2.5 : 1.
Is this financial advice?
No. RiskCalc is an educational calculator that does arithmetic on the numbers you type in. It does not know the market, your broker, or your situation, and real losses can exceed the calculated risk because of slippage, gaps, fees, and margin. The Terms of Use set this out in full.
The Journal
How do I save a trade?
After you calculate, tap Save to Journal, enter the ticker, and add notes if you like. You can save the same plan as many times as you like. To log a trade you didn’t size in RiskCalc, tap + at the top of the Journal.
How do I close a trade and record the result?
Open the trade in the Journal, enter your average exit price, and tap Close Trade. To close only part of it, enter how many shares or contracts you sold first. RiskCalc records the profit or loss and the result in R, and adds it to your Performance. A partial close counts right away. Tap More Stats for profit factor, your largest wins and losses, and each month, then tap a month to see its trades. Tap Reopen Trade to undo a close.
Can I edit a trade?
Yes. Open it and tap Edit to change its ticker, prices, quantity or date, and, once you’ve sold, its exit price or each partial close.
How do I delete a trade?
Open it and tap Delete Trade, or swipe left on it in the Journal. With iCloud sync on, it is removed from your other devices too.
Your data
Where is my data stored?
On your iPhone and, if you are signed in to iCloud, in your own private iCloud, so it is backed up. RiskCalc has no server, no analytics, no ads and no tracking, and we never receive a copy of anything you enter.
Does RiskCalc sync between devices?
Yes, automatically, if you are signed in to iCloud. Your Journal is mirrored to the private iCloud of your Apple Account and appears on your other devices. Settings ▸ Your Data in RiskCalc shows whether sync is on. To keep it on one iPhone, turn iCloud off for RiskCalc in the iOS Settings app. Your account size and risk settings stay on the device they were set on.
How do I delete everything?
Delete the app to remove everything from the iPhone. If iCloud sync was on, also remove RiskCalc's data in iOS Settings ▸ your name ▸ iCloud ▸ Manage Account Storage. There is nothing on our side to delete, because we never had it.
Something is wrong
I tapped Calculate and some fields turned red.
Those fields need a value before RiskCalc can size the trade: account size, risk per trade, entry price and, for stocks, stop loss. The message under each one says what is missing. Take Profit is optional, and so is the stop on the Options Calculator: leave it blank to risk the whole premium.
A number looks wrong.
Email us the numbers you entered and the result you saw, with a screenshot if you can. Two things explain most surprises: quantities always round down to whole shares or contracts, and options are multiplied by 100 shares per contract.
I have a feature request.
Send it. RiskCalc is built by a small studio, and requests from people actually trading with it shape what we build next.
Still stuck?
Email contact@summerlabs.dev with your iPhone model, iOS version and the numbers you entered. The Privacy Policy and Terms of Use cover your data and what the calculations can and cannot tell you.