KAST vs NullTrace
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KAST
Manage stablecoins and spend them globally with a virtual or physical card. Enjoy instant card issuance, secure transactions, and worldwide ATM access. Track spending and deposit stablecoins easily.
- Spend stablecoins globally with KAST Card
- Instant virtual card issuance
- Add card to Apple/Google Wallet
- Global ATM cash withdrawal
- Secure stablecoin deposits
- Real-time spending tracking
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Welcome to KAST, your gateway to a seamless stablecoin experience. Whether you're a seasoned stablecoin enthusiast or just getting started, KAST offers a secure and intuitive platform to manage your digital assets and spend stablecoins effortlessly via offered credit cards globally. Here’s what you can expect: Key Features: 1. Spend Anywhere, Anytime: - Pay with your stablecoins via your KAST Card at over 50 million merchants globally. - Use your KAST card for online and in-store purchases. 2. Instant Card Issuance: - Get your virtual card in less than two minutes. - Add your card to Apple Wallet or Google Wallet instantly. - Physical cards are also available for your convenience. 3. Privacy and Security: - Your privacy is our top priority. KAST ensures robust security protocols to protect your assets. - Advanced encryption and multi-factor authentication for maximum security. 4. Global Accessibility: - Withdraw cash from millions of ATMs worldwide. - Services are available in over 100 sovereign and non-sovereign regions. 5. Flexible Card Options: - Choose between two types of cards to suit your needs. - Manage your cards effortlessly within the app. Why Choose KAST? KAST is designed to bring you the best of both worlds - the innovation of stablecoins convinently. With KAST, you can: - Deposit stablecoins easily and securely. - Track your spending and manage your budget in real-time. - Enjoy 24/7 customer support for all your queries and concerns. - Join the future with KAST. Download now and start your journey towards freedom.
NullTrace
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A privacy-first Solana wallet built for people who think their financial activity is nobody else's business. Null Wallet gives you a clean, fast way to manage your SOL and SPL tokens — with privacy features baked in from the start, not bolted on as an afterthought. What you get: • Full self-custody + all standard Solana wallet capabilities and security protocols • Hide your public balances or reveal your private balances • Built-in private swaps, transfers and cross chain bridges • Burner to burn supply and close token accounts to reclaim your SOL • WalletConnect support for connecting to your favorite dApps + WalletConnect Pay Just a wallet that respects and enhances your privacy, built by people who use it. NullTrace
Screenshots
Verdict
The clearest difference is update cadence: NullTrace at daily against KAST's every 2 weeks. NullTrace also leads on iOS requirement (13.0 vs 15.5). On price, ads, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
KAST ships an update every 2 weeks, NullTrace daily. The most recent releases landed on October 22, 2026 and October 8, 2026 respectively.
| Parameter | KAST | NullTrace |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (277 ratings) — better | — |
| Positive reviews | 56.1% of reviews | — |
| Number of ratings | 277 — better | — |
| Update frequency | Every 2 weeks | Daily — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.5 | 13.0 — better |
| Further details — not scored | ||
| Size | 445 MB | 51 MB |
| Age rating | 4+ | 17+ |
| Developer | Troia Limited | NullTrace LLC |
Bugs and requests
KAST
Reported bugs
45 issues- App doesn't read digital CNH
- Account blocked without explanation
- Money held with no explanation
- Endless KYC process with repeated rejections
- Virtual card compromised with unauthorized international transactions
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- Support tells users to contact merchants themselves for fraud
- High dispute fees
- Fraud attempt notifications continue after card cancellation
- Money frozen without reason
- Money missing ($700)
- No support via email
- Transactions with errors have balance subtracted and never returned
- Receiving funds constantly under review
- Difficulty accessing a real agent
- KYC identification not working
- App has a lot of issues and downtime
- Cannot receive Pix, key not appearing
- Wallet drained after downloading app from Discord
- Card has full of problems
- Add to Apple Wallet won't work
- App makes 1 Pix, then gives error for next ones
- Unauthorized loss due to weak security
- No meaningful safeguards against suspicious activity
- No effective fraud detection alerts
- No real protection during incidents
- 2.5% currency conversion fee from USD to EUR
- App doesn't fit iPhone SE screen, not scrollable
- Pix sent to Kast disappears, not returned
- Support claims refund made without evidence
- App keeps showing 'Lost internet connection!'
- Cannot type passcode because app doesn't allow zoom in
- App freezes and crashes
- CMS00100 error when ordering card
- ID verification fails with no reason given
- App opens a web link for Apple Pay but doesn't support adding to Apple Pay
- App doesn't remember last stable coin and chain used
- After update, app doesn't open
- After update, impossible to login ('too many OTP requests')
- App shows 'Oops! We're Tidying Up!'
- Outdated user interface
- Slow and unsmooth interface
- App bugged
- Payment declined via Apple Pay contactless
- Account blocked without any reason and card terminated
- Cannot order a card (CMS00100 error)
Requested features
12 requests- Add Arabic language support
- Allow receiving Pix from anyone
- Add Burkina Faso to identity verification countries
- Add Tunisia to country list for registration
- Add Bangladesh to country list for login/signup
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- Remember last used stablecoin and chain
- Set default stablecoin and chain in settings
- Add GBP with no fees
- Add support for State ID for KYC
- Add Face ID verification
- Allow loans
- Support for more coins
NullTrace
Not enough reviews yet to summarise bugs or requests.
In-app purchases
KAST
No in-app purchases
NullTrace
No in-app purchases
