StampIt! vs Sentiary
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
StampIt!
This app helps you achieve goals and build habits with a fun sticker-collecting approach. Choose between stamp card or calendar tracking, and set custom notifications to stay on track. Unlock exclusive designs with a premium subscription.
- Goal achievement
- Habit formation
- Stamp card tracking
- Calendar tracking
- Customizable notifications
- Premium design options
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A Simple App for Goal Achievement & Habit Formation This is a simple app designed to help you achieve your goals and build habits. We created it with the fun of collecting stickers on a stamp card in mind. Features You can choose between two tracking methods and create multiple cards for different goals. Stamp Card Method Ideal when you have a set number of times to reach your goal. Calendar Method Recommended for tracking daily or regular habits. Notification Feature Set notifications to support habit formation. You can customize notifications by selecting specific days and times for each card. Premium Plan To make tracking more enjoyable, we offer a variety of card and stamp designs. With the Premium Plan, you can unlock and use all available designs.
Sentiary
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Sentiary is a voice diary + AI reflection app that helps you organize your mind just by talking. Hit the record button, speak about your day, and AI will turn it into clean text, summaries, and emotion tags. ◆ What you can do with Sentiary Record a 3‑minute voice diary with a single tap Let AI rewrite your speech into readable text Automatically generate emotion tags (“happy”, “anxious”, “tired”, etc.) Get a weekly summary, insights, and one‑line advice from your diaries Save key insights to “My Insights” and revisit them later See your emotional trends on a simple heatmap ◆ Perfect for people who… Want to keep a diary but hate typing Want to understand their emotional patterns more objectively Struggle to put feelings into words Want to notice mental changes before burning out ◆ Privacy Your audio and diary entries are stored primarily on your device and your personal backend only. When you use Pro features, only the text of your diary is sent to the AI (OpenAI API) for formatting and analysis. Audio files are never sent to external AI services. ◆ Pro features “Format with AI” “Generate emotion tags” “AI summary & analysis” Emotion heatmap and weekly report These are available via a one‑time Pro upgrade (around ¥500 / $5 / £5 / €5, depending on region). Try recording and transcribing for free first. Just talking for a few minutes a day can make your inner patterns much easier to see. Subscriptions Sentiary offers an auto-renewing subscription (“Pro”). Payment will be charged to your Apple ID account at confirmation of purchase. The subscription automatically renews unless it is canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions in your App Store account settings after purchase. Terms of Use (EULA): https://www.notion.so/Terms-and-Conditions-3299ba5c4cbd80c695dad7e45f4ff5e1?source=copy_link Privacy Policy: https://www.notion.so/Sentiary-Privacy-Policy-31d9ba5c4cbd8084a3f3c6e4ce26b7c7?source=copy_link
Screenshots
Verdict
The clearest difference is update cadence: Sentiary at weekly against StampIt!'s every 2 months. On price, ads, 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. StampIt! sells 2 in-app purchases, starting at $0.99 per month and Sentiary sells 1 in-app purchase, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.
StampIt! ships an update every 2 months, Sentiary weekly. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.
| Parameter | StampIt! | Sentiary |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 88.9% of reviews | — |
| Update frequency | Every 2 months | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 17.6 | 17.0 — better |
| Further details — not scored | ||
| Size | 57 MB | 16 MB |
| Age rating | 4+ | 17+ |
| Developer | DAIKI YUASA | Ken Ishizaka |
In-app purchases
StampIt!
- プレミアムプラン$0.991 Month
- Premium Plan$5.99
Sentiary
- Sentiary Pro$1.991 Month









