Comparison

Period vs Monthly

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Period

Features
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Want to know when everyone’s free? Need to schedule a meeting or practice during free periods? That’s where Comma comes in. Comma is a free scheduling app designed for university students. All you have to input is your available class periods—that’s it. See everyone’s free slots and plan your events smoothly. Comma also comes with smart features to make entering your availability fast and easy. ■ Features – Column Selection If you’re free all day, just tap once to select the entire day’s free periods. – Weekly Schedule Register your typical weekly free periods in advance and apply them with one tap. Input becomes even easier when you set your timetable. – Paste Feature If you have overlapping scheduling periods, you can paste availability from other events. ■ How to Use – For Organizers: Create an event, share the invitation link with your group, and enter your availability. – For Participants: Click the invite link, join the event, and enter your free periods. ■ Ideal For Club or team practice Group meetings Study sessions ...and many other group activities!

About

Monthly

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Monthlyは、月ごとの手取り金額を暦時間に基づいて分解し、月初から現在までに相当する金額をリアルタイムで表示するiOSアプリです。 当月の総秒数で均等配分された金額が1秒ごとに増加し、累積額や円/秒をシンプルなUIで確認できます。 想定される利用シーン ・月給・手取りを「時間の経過」として把握したい場合 ・月の進み具合を金額ベースで確認したい場合 ・数値が増えていく様子を静かに可視化したい場合 注意事項 ・本アプリは可視化・表示を目的としたツールです ・実際の給与計算、労働時間管理、税務処理等には使用できません ・表示される金額は、設定値と暦時間に基づく理論値です

Screenshots

Period4 screens
Monthly2 screens

Verdict

The call

The clearest difference is in-app purchases: Monthly at none against Period's 1. Monthly also leads on ads (none vs shown) and update cadence (every 4 days vs monthly). Period's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 26.0). On price 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Period sells 1 one-off in-app purchase. Monthly asks for nothing beyond the download.

UpkeepUpdate frequency

Period ships an update monthly, Monthly every 4 days. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

Scorecard5 real differences · 1 level
Period versus Monthly: the parameters behind the verdict, then further details
ParameterPeriodMonthly
PriceFreeFree
Update frequencyMonthlyEvery 4 days — better
AdsYesNo — better
In-app purchasesYesNo — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.1 — better26.0
Further details — not scored
Size45 MB4 MB
Age rating4+4+
DeveloperTOMOKI KAMOImagination Studio LLC.

In-app purchases

1 purchases

Period

One-time1
  • プレミアムパス$2.99
None

Monthly

No in-app purchases

Questions

Is Period free?
Period is free to download, with in-app purchases available.
Is Monthly free?
Monthly is free to download, with no in-app purchases.
Do Period or Monthly have ads?
Period shows ads; Monthly does not.
Which is updated more often, Period or Monthly?
Period ships an update monthly, and Monthly every 4 days. Most recently, Period was updated on October 27, 2026 and Monthly on October 28, 2026.

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