StampCalendar-Rewards Planner

Name: StampCalendar-Rewards Planner
Rating: 4.0784316 (14633 reviews)
Author: ZAIZEN Co., Ltd.

ZAIZEN Co., Ltd.

★ 4.1 (14,633 ratings)

⬇ 500,000+ downloads

Est. actual: 622,463

Free

Released: Dec 19, 2013

IAP: $0.99 - $2.99 per item

Contains ads

Rated: Everyone

Signals

4 this week · 1 positive · 1 warning All of this week's signals →

📈Last 7 days +1K installs — 66% slower than the week before (+3K) · 142/day since Sep 30
🏆Among Lifestyle apps top 1% by installs gained this week (748 peers growing)
⭐Rating steady at ★ 4.08 since Sep 30
🛠Updates quiet · updated 78 days ago

Installs since launch

+5,259 installs · -5 ratings since Sep 30

Update history

4.4.2 Aug 27, 2026 · seen Sep 30, 2026

Updated internal SDKs to comply with the latest Google Play requirements.

Only the current version so far — new entries appear as the app ships updates.

StampCalendar-Rewards Planner screenshot

StampCalendar-Rewards Planner is a lifestyle app by ZAIZEN Co., Ltd. with 500,000+ downloads (about 622K estimated). +1K installs in the last 7 days. Rated 4.1 from 15K ratings. Released Dec 19, 2013. Install growth, rank history, SDKs and ad networks.

From the store listing: “✨ Cute Stamp Planner & Rewards Calendar App ✨ Plan your day, earn points, and redeem gifts — the free calendar & To-Do app that makes scheduling fun! Manage your schedule while earning reward points to redeem for gifts. Plus, create your very own original stamps! If you're looking for a "calendar app," "rewards,"…”