IIJ SmartKey vs Surf Wallet
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
IIJ SmartKey
This app generates one-time passwords for two-step verification, enhancing online security. It supports TOTP standards and offers slide authentication for convenient logins. Additional features include app locking and cross-device data backup.
- Generates TOTP one-time passwords
- Supports slide authentication
- App locking with Touch ID/passcode
- Cross-device data backup
- Compatible with Google Authenticator
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Only enterprise user needs to register your device. You can skip registering your device, if you don't need it. The IIJ SmartKey app produces one-time passwords that conform to TOTP (RFC 6238) standards and can be used in the 2-step verification processes of a variety of online services supporting TOTP. Strengthen your online service security by linking this app, installed to your smartphone device, with your ID/password verification processes. Slide authentication can be used (ver 2.0). When logging in to a service that supports slide authentication, you will receive a push notification on your smartphone. Then you can pull the service icon for 2-step verification. For details, please visit http://www.iij.ad.jp/biz/smartkey-m/ (Written in Japanese). * To use slide authentication, you must register your device. ■ Special Features * Protects against unauthorized access by allowing the user to lock the app using a Touch ID or passcode. * Supports device changes and data backups by handing over settings between devices. * Compatible with the Google Authenticator (TOTP authentication). * Supports slide authentication. * Easy to see and read, simple and refined design. ■ Confirmed Supported Services (TOTP authentications) * Amazon Web Services * Dropbox * Evernote * Facebook * GitHub * Google Accounts * Google Apps for Work * IIJ Omnibus * IIJ Secure MX Service * Microsoft Accounts * Slack * WordPress.com ■ Confirmed Supported Services (Slide authentications) * Additional details on available services is expected soon. ■■ Please make sure to read the information below before using the app. * When switching devices, please check the app help page (https://www1.auth.iij.jp/smartkey/en/help_v2.html) before transferring service settings from your old device to the new one. * Please ensure that you confirm service restoration procedures for the various online services you utilize in advance to protect yourself against cases in which you are unable to complete the 2-step verification process due to device loss or accidental deletion of service settings. * When backing up this app to iTunes, it is necessary to encrypt the backup files. This app does not support backups to the iCloud service. ■User Agreement All users of this app must consent to the User Agreement found below before using the app. https://www1.auth.iij.jp/smartkey/en/agreement_v2.html ----- Mentioned company names and service names are the trademarks or registered trademarks of their respective companies.
Surf Wallet
This application serves as a premier zero-knowledge wallet for Web3 interactions. It offers a secure and private way to manage digital assets and engage with decentralized applications.
- Zero-knowledge wallet
- Web3 integration
- Secure asset management
- Private transactions
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Unveiling the leading zk-wallet for Web3
Screenshots
Verdict
The clearest difference is update cadence: Surf Wallet at every 6 weeks against IIJ SmartKey's every 9 months. Surf Wallet also leads on review sentiment (23% vs 10%). IIJ SmartKey's advantage is iOS requirement (12.0 vs 15.6). On price, ads, in-app purchases and monetization model 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.
IIJ SmartKey ships an update every 9 months, Surf Wallet every 6 weeks. The most recent releases landed on October 15, 2026 and October 20, 2026 respectively.
| Parameter | IIJ SmartKey | Surf Wallet |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.3 (25 ratings) — better |
| Positive reviews | 10.0% of reviews | 23.4% of reviews — better |
| Number of ratings | — | 25 — better |
| Update frequency | Every 9 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 12.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 19 MB | 39 MB |
| Age rating | 4+ | 17+ |
| Developer | Internet Initiative Japan, Inc. | Surf Labs Inc. |
Customer experience
IIJ SmartKey
Surf Wallet
Bugs and requests
IIJ SmartKey
Not enough reviews yet to summarise bugs or requests.
Surf Wallet
Reported bugs
13 issues- Swap button is gone
- Dapp no longer available
- Vault lagging
- Transaction failed
- App keeps closing when signing transactions
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- Cannot send assets or make swaps
- App crashes when connecting to Cetus
- Coins not appearing in search
- Login fails after reinstallation with error
- Cannot supply additional SUI to Scallop
- FaceID unlock leads to user cancellation
- Cannot add more than 999 Sui to Navi Protocol
- Fuddies nft not displayed
Requested features
3 requests- Include a swap button
- Bookmark Dapps and sites
- Coin pinning feature like SUI wallet
In-app purchases
IIJ SmartKey
No in-app purchases
Surf Wallet
No in-app purchases









