GRAntz vs COL
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GRAntz
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grantz(グランツ)の公式アプリです。 専用アプリなのでいつもの予約がとっても簡単! 24時間いつでも予約が可能です。 マイページからは予約状況の確認や予約履歴の確認、 キャンセルなどもマイページ上から行えます。 【主なアプリの機能】 ◾予約機能 ◾クーポン ◾マイページ機能 ◾お知らせ機能
COL
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COL(コル)の公式アプリです。 専用アプリなのでいつもの予約がとっても簡単! 24時間いつでも予約が可能です。 マイページからは予約状況の確認や予約履歴の確認、 キャンセルなどもマイページ上から行えます。 【主なアプリの機能】 ◾予約機能 ◾クーポン ◾マイページ機能 ◾お知らせ機能
Screenshots
Verdict
The clearest difference is update cadence: COL at every 16 months against GRAntz's every 38 months. COL also leads on iOS requirement (13.0 vs 15.6). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
GRAntz ships an update every 38 months, COL every 16 months. The most recent releases landed on October 21, 2026 and October 14, 2026 respectively.
| Parameter | GRAntz | COL |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 38 months | Every 16 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Naoya Takahashi | tomoharu ishibashi |
In-app purchases
GRAntz
No in-app purchases
COL
No in-app purchases








