Comparison

Surge Credit vs Core Invoice

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Surge Credit

Access a Bitcoin-native dollar credit line without selling your cryptocurrency. Control your funds with a self-custodial wallet, lock Bitcoin as collateral, and draw funds instantly. Enjoy flexible repayment and verifiable on-chain security.

Highlights
  • Bitcoin-native credit line
  • Self-custodial wallet
  • Verifiable on-chain collateral
  • Flexible repayment options
  • Rates from 6.9% APR
  • Draw funds as USDC or gift cards
Features
Read full description

Surge Credit is a Bitcoin-native dollar credit line. Not a loan - a revolving credit line you control. Draw what you need, repay when you want, re-borrow without reapplying. Your Bitcoin stays in verifiable Taproot vaults on the Bitcoin blockchain. Always. How it works: 1. Set up your wallet - create a self-custodial wallet in-app or connect your own. Your keys, always. 2. Choose your credit line - set your amount, pick variable or fixed rates 3. Lock your Bitcoin - deposit BTC into your Taproot vault, verified on-chain in ~30 minutes 4. Get your credit - funds arrive instantly, send USDC or spend with gift cards Why Surge Credit: Non-custodial - Surge never holds your Bitcoin or stablecoins. Zero rehypothecation - your collateral doesn’t get lent out, traded, or moved. Verifiable on-chain - inspect your Taproot vault anytime. Don’t trust, verify. Unilateral exit - repaid your line but collateral isn’t released? Take it back yourself. No permission needed. Enforced by Bitcoin. Health monitoring - live health meter tracks your collateral ratio. Notifications at every stage so you’re never caught off guard. Flexible repayment - no fixed terms, no schedules, no penalties. Repay any amount, anytime. Rates from 6.9% APR - variable rates that adjust with market demand, or lock in at 9.9% fixed. Spend your way: → Send USDC anywhere, instantly → Spend with gift cards → Bank transfers and card spending coming soon Built different: → No KYC → No token → No middlemen → Bitcoin-native collateral — no wrapping, no bridging → 12-month term, rollover anytime Surge Credit is built for Bitcoiners who refuse to compromise on custody to access liquidity. Your Bitcoin. Your terms.

About

Core Invoice

Features
Read full description

Create professional invoice PDFs in seconds with a minimal workflow. Core Invoice is a simple invoice maker for freelancers, contractors, self-employed professionals, and small businesses who want the fastest way to create and share a clean invoice. No account. No complicated setup. No clutter. Just enter the essential details and export a polished PDF. With Core Invoice, you can: - add your business name - enter the client name - choose the invoice date - add an invoice number - write a description - set the total amount - choose a preset or custom currency code - export and share a clean PDF Why people choose Core Invoice: - simple invoice maker with a focused workflow - professional PDF output - only the fields you actually need - remembers your business name and default currency - fast enough for repeat everyday invoicing Perfect for: - freelancers - contractors - self-employed professionals - small businesses - anyone who needs a lightweight invoice maker Free to start: - includes 3 free invoice exports - upgrade to unlock unlimited exports By downloading or using this app, you agree to the Apple EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Surge Credit4 screens
Core Invoice4 screens

Verdict

The call

The clearest difference is in-app purchases: Surge Credit at none against Core Invoice's 1. Surge Credit also leads on iOS requirement (15.1 vs 18). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Core Invoice sells 1 in-app purchase, starting at $1.99 per month. Surge Credit asks for nothing beyond the download.

Scorecard2 real differences · 8 level
Surge Credit versus Core Invoice: the parameters behind the verdict, then further details
ParameterSurge CreditCore Invoice
PriceFreeFree
Rating5.0 (5 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings5 — better—
Update frequencyEvery 3 weeks—
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.1 — better18
Further details — not scored
Size58 MB2 MB
Age rating4+4+
DeveloperSurge CreditNikita Cherednikov

In-app purchases

None

Surge Credit

No in-app purchases

1 purchases

Core Invoice

Subscriptions1
  • 1 Month$1.991 Month

Questions

Is Surge Credit free?
Surge Credit is free to download, with no in-app purchases.
Is Core Invoice free?
Core Invoice is free to download, with in-app purchases available.
Do Surge Credit or Core Invoice have ads?
Neither Surge Credit nor Core Invoice shows ads.

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