Deep Sky Diary vs えもーぐ
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Deep Sky Diary
Record your thoughts and memories for your future self or send messages into the void. This app allows you to create regular diary entries, schedule future readings, or send messages that are permanently deleted.
- Regular diary entries
- Scheduled future readings
- Ephemeral black hole messages
- Optional black hole receipt
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Sometimes, you probably want to talk to your "future self", and sometimes, you probably want to just talk to nowhere. Deep Sky Diary is here for you. - Keep regular diaries - Write diaries for future you: set a date and read the diary after that day. - Write a diary and send it to the black hole (nowhere) * *: The message will be discarded and not saved on your local device. If you choose to save a receipt, a story with the title "Blackhole Receipt" will be saved.
えもーぐ
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身の回りのできごとに『気持ち』とそのレベルを日記として記録していこう。 ポジティブな感情はプラス、ネガティブな感情はマイナスとして気分の上がり下がりを月ごとに可視化できます。 気分が沈んだ月が連続したときは少しだけ意識してポジティブな投稿をしてみましょう。 継続的に記録していくことで気持ちの浮き沈みを減らすことにつながります。 このアプリを使う皆様が平穏で豊かな人生を送れることを願って えもーぐ を作りました。 ※データの収集や公開はされません。安心してお使いください。 アプリに関してご意見ご要望あればお気軽にお問合せください。 Twitter：Cookie_dev49483
Screenshots
Verdict
The clearest difference is ads: Deep Sky Diary at none against えもーぐ's shown. Deep Sky Diary also leads on update cadence (every 3 days vs every 3 weeks) and iOS requirement (14.1 vs 16.0). On price, 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.
Deep Sky Diary ships an update every 3 days, えもーぐ every 3 weeks. The most recent releases landed on October 11, 2026 and October 10, 2026 respectively.
| Parameter | Deep Sky Diary | えもーぐ |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 3 days — better | Every 3 weeks |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 14.1 — better | 16.0 |
| Further details — not scored | ||
| Size | 8 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Shunzhe Ma | Eiichi Akutsu |
In-app purchases
Deep Sky Diary
No in-app purchases
えもーぐ
No in-app purchases
