KeepCallingとRebtelの比較

課金単位

KeepCallingの請求方法は切り上げ、Rebtelの請求方法は1分単位です。同じ分単位の料金でも、請求方法によって合計額は異なり、その差が最も大きくなるのは、まさに多くの人が通話する地域です。35秒の通話を切り上げて1分分として請求すると、その通話にはおよそ七十パーセントの割増が発生します。しかし料金自体は変わっていないため、どの料金比較にもこの差は現れません。

クレジットの有効期限

KeepCalling：無期限。Rebtel：非公開。クレジットの有効期限は、料金表には現れないコストです。一度にチャージする金額が大きいほど、また通話の頻度が低いほど影響が大きくなります。緊急時に備えて購入したまま使われていない残高こそ、利用停止ルールの対象になります。

プラットフォーム

KeepCallingはiOS, Android, Webで利用できます。RebtelはiOS, Androidで利用できます。この点で決まる比較は、実際より多くあります。どれほど優れたサービスでも、手元の端末で利用できなければ候補にはなりません。また、代わりに1時間スマートフォンを耳に当て続けることになるなら、デスクトップ用クライアントの有無は見た目以上に重要です。

KeepCallingの公開情報に基づく内容

• per minute, with minute rounding.
• none (marketing emphasises no hidden or extra fees; rounding is per minute).
• App store descriptions state that voice credit balance 'never expires'; only minute rounding is applied during calls.
• $2 (minimum order noted for voice credit).

Rebtelの公開情報に基づく内容

• per minute (Rebtel markets one‑minute billing).
• none (Rebtel markets 'no hidden fees' and does not list a separate connection fee).
• Marketing emphasizes no contracts and no hidden fees; public pages do not prominently document a fixed expiry period for purchased calling credit.
• Voice credit/top‑up minimum not clearly stated; some plans sold in fixed price bundles such as unlimited and minute packages.

KeepCallingの公開情報に基づく内容

Users create an account on KeepCalling.com, purchase voice credit or a plan, and can then call via access numbers or smartphone apps.

Rebtelの公開情報に基づく内容

Users install the app on iOS or Android, create a Rebtel account, and verify with their phone number to start calling or sending top‑ups.

KeepCallingの公開情報に基づく内容

Offers minutes‑based calling plans from $4.99/month, unlimited country‑specific plans from $2.99/month, and a World Unlimited plan from $10/month, plus separate prepaid Voice Credit with a minimum order of $5 according to the calling‑plan page.

Rebtelの公開情報に基づく内容

Offers Unlimited Country plans (e.g. India Unlimited), Global Unlimited, and minutes‑based plans, alongside pay‑per‑minute credit.

KeepCalling

• United States, landline: Low per‑minute rates such as around 0.9¢/min to Brazil are given as examples; the full table includes US as a destination but specific US row is not visible in snippet.

記録された情報源：KeepCalling country‑specific rate tables and calling‑plan overview; detailed US/UK/India/Nigeria/Philippines rows are accessible via the 'Rates' tab.

Rebtel

• India, mobile: From about $0.0278/min pay‑as‑you‑go or included in unlimited India subscriptions; exact current per‑minute USD rate varies by plan.

記録された情報源：Rebtel official rates and India calling explainer pages; detailed per‑country tables are in the in‑app rate lookup and web 'rates' tool.

KeepCalling

• Sells prepaid Voice Credit for calls to over 200 destinations.
• Offers monthly calling plans with fixed minutes or unlimited calling to specific countries and a World Unlimited plan.
• Provides local access numbers and smartphone apps for placing calls.
• Supports international SMS at separate per‑message rates.
• App descriptions emphasise no hidden or extra fees and minute rounding.
• Balance is advertised as never expiring, provided the account remains active.
• Mobile apps available for iPhone and Android devices.
• 24/7 customer service is promoted through app‑store descriptions.

Rebtel

• Places international calls to landlines and mobiles in more than 190 countries.
• Uses local access numbers when available so calls can work without an active data connection.
• Offers unlimited calling subscriptions and destination‑specific minute bundles as well as pay‑as‑you‑go credit.
• Supports mobile top‑ups to international numbers from within the app.
• Markets 'no contracts or hidden fees' and transparent per‑minute pricing.
• Provides apps for iOS and Android; no separate desktop app is promoted.
• Targets migrants and international nomads as primary user segments.
• Calls can be routed over 3G/4G, Wi‑Fi, or local phone lines depending on configuration.

KeepCalling

• Some user reviews report occasional call quality issues to certain destinations.
• There are complaints about the auto‑renewal of calling plans and difficulties cancelling before renewal dates.
• A small number of users mention confusion about minute rounding and how many minutes remain for a given balance.

Rebtel

• Some app‑store reviews report occasional call drops and variable call quality, especially on weaker mobile data connections.
• Users have complained about promotional offers or 'unlimited' plans having fair‑usage conditions they found unclear.
• Several reviews mention issues with billing or being charged unexpectedly when local access numbers are treated as chargeable calls by mobile carriers.