Rakuten Link Office vs RelayTimer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Rakuten Link Office
This app provides unlimited free calls and messages for Rakuten Mobile corporate plan subscribers. It allows group chats, file sharing, and contact synchronization. International communication is available with pay-as-you-go billing.
- Unlimited free calls and messages
- Group chats up to 100 people
- Photo, video, and document sharing
- Contact synchronization
- International communication options
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This app offers unlimited free calls and messages for Rakuten Mobile corporate cellular plan subscribers. Core features: ・Rakuten Mobile Corporate subscribers can make unlimited calls and send Link message to Rakuten Link Office users, as well as to other mobile networks and landline numbers in Japan. Calls to mobile phones and landlines including other carriers in Japan are free when calling to a Japanese number (some numbers not included). ・You can create chat groups with other Rakuten Link users for up to 100 people, and share photos, videos, and documents, as well as messages. ・Register and edit contacts in sync with the default address book on your phone. Please note: ・Communication from Japan to overseas and from overseas to overseas with pay-as-you-go billing by country / region (SMS to countries and regions covered overseas is free). ・Emergency calls not available when in overseas roaming areas. ・Usage charges, overseas roaming (data communication) and international calls, and international SMS service areas and provision conditions are subject to change without notice. For more detailed information, please refer to links below(Japanese): https://business.mobile.rakuten.co.jp/service/rakuten-link-office/ ・Activation Manual How to setup Rakuten Link Office on compatible iPhone models (Not compatible with iPad, iPod touch) https://business.mobile.rakuten.co.jp/support/link/setting/activation-ios/ ・How to use https://business.mobile.rakuten.co.jp/support/link/manual/guide-rakuten-link ・FAQ https://business.mobile.rakuten.co.jp/support/ ・Sending feedback/Support request Please consider logging out and back into the app or reinstalling it as well. https://business.mobile.rakuten.co.jp/support/link/manual/feedback-ios/ --- QR Code is a registered trademark of DENSO WAVE INCORPORATED.
RelayTimer
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インターバルトレーニングに最適な、2つのフェーズを連続して管理できる多連タイマーです。プロの現場で使いやすいシンプルな操作性を追求しました。
Screenshots
Verdict
The clearest difference is in-app purchases: Rakuten Link Office at none against RelayTimer's 1. Rakuten Link Office also leads on iOS requirement (14.5 vs 26.0). RelayTimer's advantage is update cadence (every 6 weeks vs every 4 months). 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
Both are free to download. RelayTimer sells 1 one-off in-app purchase. Rakuten Link Office asks for nothing beyond the download.
Rakuten Link Office ships an update every 4 months, RelayTimer every 6 weeks. The most recent releases landed on October 21, 2026 and October 15, 2026 respectively.
| Parameter | Rakuten Link Office | RelayTimer |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) — better | — |
| Positive reviews | 38.5% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 4 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 14.5 — better | 26.0 |
| Further details — not scored | ||
| Size | 148 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Rakuten Group, Inc. | Yuta SAKAI |
In-app purchases
Rakuten Link Office
No in-app purchases
RelayTimer
- Pro Version Upgrade$4.99
