Comparison

Grimm App vs Duality Wallet

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

Head to head
About

Grimm App

Features
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Grimm App is a secure and modern Bitcoin wallet. Whether you’re 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, you’re not just using money, you’re owning it. Security First Grimm App is non-custodial you’re 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.

About

Duality Wallet

Read 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

Grimm App4 screens
Duality Wallet3 screens

Verdict

The call

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

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.

Scorecard1 real difference Β· 5 level
Grimm App versus Duality Wallet: the parameters behind the verdict, then further details
ParameterGrimm AppDuality Wallet
PriceFreeFree
Update frequencyEvery 2 monthsEvery 5 days β€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, iPod
Requires iOS15.115.1
Further details β€” not scored
Size56 MB51 MB
Age rating4+17+
DeveloperGrimm Technologies SARLDuality Wallet Pty Ltd

In-app purchases

None

Grimm App

No in-app purchases

None

Duality Wallet

No in-app purchases

Questions

Is Grimm App free?
Grimm App is free to download, with no in-app purchases.
Is Duality Wallet free?
Duality Wallet is free to download, with no in-app purchases.
Do Grimm App or Duality Wallet have ads?
Neither Grimm App nor Duality Wallet shows ads.
Which is updated more often, Grimm App or Duality Wallet?
Grimm App ships an update every 2 months, and Duality Wallet every 5 days. Most recently, Grimm App was updated on October 24, 2026 and Duality Wallet on October 31, 2026.

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