Grimm App vs Duality Wallet
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Grimm App
Read full descriptionHide full description
Grimm App is a secure and modern Bitcoin wallet. Whether youβre sending money to a loved one, paying for services, or receiving funds from anywhere in the world, Grimm makes Bitcoin fast, simple, and accessible through the power of the Lightning Network and Onchain. What You Can Do with Grimm: Send & receive Bitcoin instantly via the Lightning Network (low fees, no delays) Scan QR codes to pay or generate a payment request Check your balance and transaction history anytime, anywhere Sync your wallet easily using your seed phrase Get notified about new payments, activity, and wallet updates Dark mode for comfort and battery savings Why Grimm App? Grimm App is designed for the realities of people around the world, where access to stable financial infrastructure is limited and remittance fees are high. We believe in a decentralized, open financial system powered by Bitcoin. With Grimm App, youβre not just using money, youβre owning it. Security First Grimm App is non-custodial youβre in full control of your funds. Your Bitcoin private keys are stored only on your device, encrypted and recoverable through a 12 or 24-word seed phrase. No one can access your money but you.
Duality Wallet
Read full descriptionHide full description
Cash on your phone. As simple as Apple Pay, as fast as a text message, and as open as email. Duality is a self-custodial wallet that finally makes bitcoin feel like money you can actually use. Spend it, send it, get paid in it, in seconds, with no bank or middleman taking a cut. MONEY THAT MOVES LIKE A MESSAGE Payments settle over the Lightning network in seconds, not the three-day "pending" you're used to. Send, and it's done. TWO POCKETS, ONE WALLET Keep a Digital Cash balance to spend day to day, and a Bitcoin balance to hold. Swipe between them, and convert one to the other in a tap. GET PAID LIKE EMAIL Claim your own Lightning address: you@dualitywallet.money. Anyone, on any Lightning wallet, can pay you. No app lock-in, no account numbers. PAY IN A TAP Tap to pay over NFC, or scan any QR code with Quick Pay. Save the people and places you pay often as Favourites and settle up in two taps. SIGN IN WITH A PASSKEY, BACKED BY YOUR RECOVERY PHRASE Create and unlock your wallet with your fingerprint or face, with no password to remember. Your recovery phrase is the backup that always works: save it when you set up, and it restores your wallet on any device, whatever happens to your phone. YOUR KEYS, YOUR MONEY Your keys are generated on your device and never leave it. There's no account, no email signup, and no company that can freeze, spend, or block your balance. No analytics or tracking, in the app or on our site. SECURED BY BITCOIN Duality is built on Spark, a bitcoin layer 2, using the Breez SDK. Your money is secured by the most open, decentralised monetary network there is. Value you hold directly, not an IOU. Money without middlemen. Download Duality and try it today. Self-custodial means you're in control and responsible for your own access. Bitcoin's value can go up and down. Duality is not a bank and does not offer insured deposits.
Screenshots
Verdict
The clearest difference is update cadence: Duality Wallet at every 5 days against Grimm App's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Grimm App ships an update every 2 months, Duality Wallet every 5 days. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.
| Parameter | Grimm App | Duality Wallet |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 5 days β better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.1 | 15.1 |
| Further details β not scored | ||
| Size | 56 MB | 51 MB |
| Age rating | 4+ | 17+ |
| Developer | Grimm Technologies SARL | Duality Wallet Pty Ltd |
In-app purchases
Grimm App
No in-app purchases
Duality Wallet
No in-app purchases









