Comparison

Moca | 自分にメールを送るメモ帳 vs SixDo

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

Head to head
About

Moca | 自分にメールを送るメモ帳

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このアプリは、自分自身にメールを送ることで記録する画期的なメモアプリです。 このアプリには、通常のメモ帳アプリのようにメモをアプリ内に保存する機能がありません。 その代わりに、アプリにメールアドレスを入力しておくことで 書いたメモをそのアドレス宛にスピーディに送ることができます。 あなたがやることは、ふと思い浮かんだアイデアを書き留めて、送信ボタンを押すだけ。 削除機能も編集機能もなく、煩わしいメモの管理から解放されることでしょう。

About

SixDo

Features
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You open your list and twenty things are already on it. By the time you have decided where to start, you no longer want to. SixDo only lets you write six. There is no seventh line, so you choose before you write. No ads. Free. ■ What the Ivy Lee Method is A hundred-year-old habit, from a consultant named Ivy Lee in 1918. 1. At the end of the day, write down up to six things for tomorrow 2. Put them in order of importance 3. The next day, work down the list 4. Whatever is left moves to the following day 5. Repeat That is all of it. Deciding less in the morning is the point. ■ What SixDo does ・No ads, at all  Not in the free version either. Nothing here competes for your attention. ・Six is a ceiling, not a quota  Three things on a three-thing day is fine. No filler. ・Edit in place  Tap a task to change it. No separate screen to go to. ・Order without obligation  Top to bottom is the idea, but finish whatever you can. ・Unfinished work moves on  It carries to the next day by itself. You can turn that off. ・Notifications only when there is a reason  In the evening, only if tomorrow is still empty. In the morning, only if something is left. Not a fixed alarm. Each can be turned off. ・Your records survive a new phone  Export and import, and it is included in your iCloud backup. ・Widget … your next task on the Home Screen  Put "The one now" on your Home Screen. Free. ・Eight accent colors (free) ・Light, dark, or match your device ・Look back at what you finished  A year of it, on a calendar. Free. ■ Who it suits ・You have too much to do and lose the morning deciding where to start ・You installed a to-do app once, and it had too much in it ・You are tired of apps full of advertising ・You want the first hour of the day to be easier ■ SixDo Pro (one-time purchase, optional) Free is not a trial. Keeping to six a day works fully without paying, and there are no ads either way. Pro is for people who want more from it. ・Separate work and personal … six each, and they never mix ・Someday … park what you cannot move on yet, with a note ・Insights … your streak, your best days, and the work/personal split ・Weekly review … a Sunday evening note on how many you finished ・Widgets … today’s six, this month, and the Lock Screen ・Timed reminders … pick a date and time for each task Not a subscription. Buy once, keep it. ■ Privacy Nothing is collected. What you type stays on your iPhone. There is no account and no sign-in. Six things, in order, from the top. That is enough to change a day.

Screenshots

Moca | 自分にメールを送るメモ帳1 screens
SixDo4 screens

Verdict

The call

The clearest difference is in-app purchases: Moca | 自分にメールを送るメモ帳 at none against SixDo's 1. Moca | 自分にメールを送るメモ帳 also leads on update cadence (every 4 days vs every 4 weeks) and iOS requirement (11.0 vs 16.0). SixDo's advantage is ads (none vs shown). On price 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. SixDo sells 1 one-off in-app purchase. Moca | 自分にメールを送るメモ帳 asks for nothing beyond the download.

UpkeepUpdate frequency

Moca | 自分にメールを送るメモ帳 ships an update every 4 days, SixDo every 4 weeks. The most recent releases landed on November 12, 2026 and November 10, 2026 respectively.

Scorecard4 real differences · 2 level
Moca | 自分にメールを送るメモ帳 versus SixDo: the parameters behind the verdict, then further details
ParameterMoca | 自分にメールを送るメモ帳SixDo
PriceFreeFree
Update frequencyEvery 4 days — betterEvery 4 weeks
AdsYesNo — better
In-app purchasesNo — betterYes
DevicesiPhone, iPod — betteriPhone
Requires iOS11.0 — better16.0
Further details — not scored
Size33 MB32 MB
Age rating4+4+
DeveloperHiroki Ogatamami hara

In-app purchases

None

Moca | 自分にメールを送るメモ帳

No in-app purchases

1 purchases

SixDo

One-time1
  • SixDo Pro$3.99

Questions

Is Moca | 自分にメールを送るメモ帳 free?
Moca | 自分にメールを送るメモ帳 is free to download, with no in-app purchases.
Is SixDo free?
SixDo is free to download, with in-app purchases available.
Do Moca | 自分にメールを送るメモ帳 or SixDo have ads?
Moca | 自分にメールを送るメモ帳 shows ads; SixDo does not.
Which is updated more often, Moca | 自分にメールを送るメモ帳 or SixDo?
Moca | 自分にメールを送るメモ帳 ships an update every 4 days, and SixDo every 4 weeks. Most recently, Moca | 自分にメールを送るメモ帳 was updated on November 12, 2026 and SixDo on November 10, 2026.

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