Cursaris is a native crypto portfolio terminal for iPhone, iPad and Mac. VaR and futures-aware tax estimates, computed on the device. Reads all 11 exchanges read-only.
Know your downside before the market shows you it.
Most trackers stop at profit and loss. Cursaris computes what you can actually lose — Value-at-Risk at 95%, Monte-Carlo projections and seven stress scenarios, all on the device.
VaR · 95%
The one-day loss your book stays under 95% of the time — historical and Monte-Carlo, side by side.
Monte-Carlo
Thousands of Cholesky-GBM paths project where equity could land over 7, 30 and 90 days.
7 Stress tests
Four historical crashes — COVID, LUNA, FTX and 3AC — plus market-correction and black-swan presets and a custom builder, replayed against your current positions.
On-device
Every simulation runs on your iPhone or Mac. No positions are uploaded anywhere to compute it.
VaR · 95% · 1DMONTE-CARLO
1-day loss won’t exceed−$4,3905.5% of the portfolio · 95% confidence
P5–P95P25–P75median
MethodLoss% port
Hist VaR 95%−$4,2025.2%
Hist VaR 99%−$5,0966.3%
MC VaR 95%−$4,3905.5%
MC VaR 99%−$6,1707.7%
CVaR 95% (ES)−$4,8566.0%
STRESS · SCENARIOSMODELED
Black Swan · 70% crash−52.0%
COVID crash · Mar 2020−38.2%
3AC cascade · Jun 2022−27.5%
LUNA / UST · May 2022−24.1%
FTX contagion · Nov 2022−18.9%
Market correction · −20%−13.4%
02/ TAX
Cost basis, worked out the way each book settles.
Cursaris estimates cost basis the way each book actually settles — futures realized per closed trade and netted for the year, with Section 1256’s 60/40 split where it applies; spot matched lot by lot, with HIFO and loss-harvesting on top — then exports it. It’s the number you hand to Koinly, not a filing service.
Futures-aware
Every closed perp is realized on close, net of fees and funding — then the year is netted, so losses offset winners before any rate applies.
Section 1256
The 60/40 long-/short-term split, applied to your net qualifying-futures gain for the year.
HIFO lots
On the spot book, highest-in-first-out matching surfaces your largest cost basis first and flags harvestable losses.
Export
Cost-basis estimates you export to CSV or PDF — the starting number you hand your accountant.
Sample data · CSV / PDF export
03/ PRIVACY
Your keys stay yours. Your book stays on the device.
Cursaris connects with read-only API keys held in the Keychain — no accounts, no custody, no cloud copy of your positions. It can read your balances and compute on them; it can never trade, withdraw or transfer.
Read-only keys
Read-only by design — the app contains no code that can place an order or move funds on an exchange. On all 11 of them it can only read; it can never trade, withdraw or transfer.
Keychain
Keys live in the Keychain on your device — never uploaded to a Cursaris server; the secret is only ever sent to the exchange it belongs to.
No custody
No accounts, no wallet, no custody. Your positions are never copied to a Cursaris cloud.
Not a broker
Cursaris reads and computes. It never touches, routes or holds your funds.
API KEY · KEYCHAINREAD-ONLY
Binance••••••••3F9A
Scope granted
✓Read balances
✓Read positions
✓Read order history
Not permitted
✕Place / cancel orders
✕Withdraw funds
✕Transfer / internal move
Stored in the Keychain · never uploaded to Cursaris · no custody
Data path
Connect read-only. Compute on-device. Nothing goes to Cursaris.
The exact path your positions take — and, more to the point, where they stop.
Exchange11 supported
read-only key
Your deviceiPhone · Mac
on-device compute
Yourisk · tax
×Cloud copy of positions
Everything else
One app instead of a five-tool stack
The rest of what Cursaris does — at a glance, all on the same device.
Native across Apple
One app on every screen — a real Mac app, iPhone, an Apple Watch app with complications, Lock-Screen widgets and Live Activities. No web wrapper, no companion cloud.
iOSiPadOSmacOSwatchOS
Widget+$1,240 PnL
Live Activity ROE +2.5%
Complication+2.14%
Alerts & trading plans
If-then rules on price, PnL, liquidation distance, funding and indicators (RSI, MACD, EMA) — checked on your device; they notify you, write a log, or call your webhook.
BTC ≤ $58,000price
Liq. distance ≤ 5%risk
Correlation radar
How tightly your book moves together.
1.00.62.41.621.00.55.41.551.00
Backtest
Replay a strategy across history.
Monte-Carlopaths
Walk-forwardsplits
Macro pulse
Funding, OI, long/short and Fear & Greed.
Funding0.011%
OI$31.2B
L/S1.24
F&G61
5-min sync · F&G: alternative.mea private glance, next to your positions
Smart money
On-device wallet-activity signals — never a whale-intel feed.
a private glance, next to your positions
On-chain
Read-only balances across five chains, plus Aave health on four of them.
Comparison
vs. a generic tracker
The differences that never show up in a P&L number.
