Comparison

STOCK vs DailyMark

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

Head to head
About

STOCK

Features
Read full description

日々の行動を気軽に書き留める 行動日記アプリです。 行動を短く書くだけで、 思ったよりやれていることや、 日々の積み重ねが見えてきます。 手軽さを大切にし、負担を減らした シンプルなデザインにしています。 シンプルながら便利な機能も 備えています。 たとえば、 スライドショーで一日を振り返ったり、 タグを付けて「がんばった」「楽しんだ」など 自分なりの視点で見返したりできます。 自分のペースで続けられます。

About

DailyMark

Features
Read full description

A diary that converses with the past. DailyMark is not a social feed and not a blog. The words here are not meant to be shown to anyone. They keep the facts that existed only in that moment, for the self yet to come. The moment you brace yourself to keep a diary, you start erasing the thoughts that embarrassed you, searching only for the good memories, and wearing yourself out trying to recall what you were too busy to write down last week. This app does not allow that. The immaturity, the hesitation, the contradiction — each is engraved as the reality of that moment. So a record can be kept only as that same day's entry, and once engraved it can be neither edited nor deleted. This is not just a diary. It is a log that keeps the traces of change, so the future you can converse with it. [How a record works] - Text only (no photo, no video, no location) - Up to 400 characters per record - A URL may be included (URLs do not count toward the limit) - No editing, no deletion [Records per day] - Free: twice a day - Pro: five times a day (the same during the 14-day trial) This is not a place to write a great deal. It is a place to record how today, and how now, really was. [Asking your past self] Pose a question such as "What have I been worried about lately?" or "A year ago, what was on my mind?" and the AI reads back through your past records and answers in the voice of who you were then. - Free: 5 times in total - Pro: up to 30 times a month [A monthly reflection (Pro)] On Pro, the AI reads back over a past month's records and returns the recurring themes, the signs of change, and the lingering tone in a short passage. [The color of feeling] Each record's text is read for its emotional tendency, based on the circumplex model of affect, and kept quietly on the calendar as the color of that day. Looking back across time, a restless season or a calm one comes through, letting you review your past for yourself. [Exporting records (Pro)] Your own records can be exported at once in three formats — JSON, Markdown, and CSV — and saved through the share sheet (up to 3 times a month). [Privacy] - No ads, no third-party tracking - Records are not used to train AI (assured by the OpenAI and Anthropic API terms) - Each record is visible only to its author (Row Level Security) - Deleting the account removes the data permanently (within 30 days, with no recovery) [Requirements] - iOS 15 or later - iPhone only (iPad and Mac are not supported) - Japanese and English (following the device language) [Subscription] - DailyMark Pro: a monthly subscription, auto-renewing (see App Store for local pricing) - Cancellation is handled in the standard iOS Subscriptions settings - Pro features remain available through the paid period [Support and legal] For questions: kokujitsuki@five-birds.com Privacy Policy: https://five-birds.com/kokujitsuki/privacy Terms of Service: https://five-birds.com/kokujitsuki/terms Specified Commercial Transactions Act notice: https://five-birds.com/legal/tokushoho To keep, for the future self, the feeling and the thought and the hesitation that exist only in this moment. Not a life smoothed into order, but the process of change itself, engraved as it happens.

Screenshots

STOCK4 screens
DailyMark4 screens

Verdict

The call

The clearest difference is in-app purchases: STOCK at none against DailyMark's 1. DailyMark's advantage is update cadence (weekly vs every 3 weeks) and iOS requirement (15.1 vs 18.6). On price, ads 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. DailyMark sells 1 in-app purchase, starting at $1.99 per month. STOCK asks for nothing beyond the download.

UpkeepUpdate frequency

STOCK ships an update every 3 weeks, DailyMark weekly. Both last shipped on November 9, 2026.

Scorecard3 real differences · 3 level
STOCK versus DailyMark: the parameters behind the verdict, then further details
ParameterSTOCKDailyMark
PriceFreeFree
Update frequencyEvery 3 weeksWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhoneiPhone, iPod — better
Requires iOS18.615.1 — better
Further details — not scored
Size4 MB40 MB
Age rating4+4+
DeveloperJIMOTONO NECO, K.K.five-birds.com

In-app purchases

None

STOCK

No in-app purchases

1 purchases

DailyMark

Subscriptions1
  • DailyMark ProMonthly14 Days trial$1.991 Month

Questions

Is STOCK free?
STOCK is free to download, with no in-app purchases.
Is DailyMark free?
DailyMark is free to download, with in-app purchases available.
Do STOCK or DailyMark have ads?
Neither STOCK nor DailyMark shows ads.
Which is updated more often, STOCK or DailyMark?
STOCK ships an update every 3 weeks, and DailyMark weekly. Most recently, STOCK was updated on November 9, 2026 and DailyMark on November 9, 2026.

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