DuomiFlow vs InkBrook
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DuomiFlow
Record prices and data to track trends and gain long-term insights for better decision-making. Analyze historical data, identify abnormal movements, and compare multiple items to understand changing conditions. All data is stored locally for complete privacy.
- Record product prices
- Track procurement costs
- Manage recurring expenses
- Monitor asset changes
- Analyze long-term trends
- Record market indicators and other data
Read full descriptionHide full description
DuomiFlow – Offline Price & Data Logger Stop guessing. Start tracking. DuomiFlow is a lightweight, privacy-first tool for manually recording prices, monitoring trends, and making data-driven decisions. No cloud. No ads. Just your data, safely on your device. Why DuomiFlow? We interact with prices daily—groceries, subscriptions, procurement, or assets. But without historical records, we rely on memory. DuomiFlow turns isolated numbers into long-term insights. Key Features: • Manual Price Tracking: Log product prices, recurring expenses, and procurement costs with ease. • Visual Trend Analysis: Instantly see historical highs/lows, trend directions (up/down/sideways), and abnormal movements. • Beyond Prices: Record market indicators, behavioral metrics, or any custom data points. • 100% Offline & Private: No mandatory registration. No ads. No personal data collection. Your records stay strictly on your device. Set Realistic Expectations: DuomiFlow is NOT an automated market data platform or a trading system. It is a dedicated, manual recording engine designed to help you build personal trend awareness and make rational decisions based on real, historical data. Track prices. Understand change. Decide with clarity. Terms of Service: https://www.duomi.vip/duomi-price-terms-of-service/ Privacy Policy: https://www.duomi.vip/duomi-price-privacy-policy/
InkBrook
Read full descriptionHide full description
InkBrook is a study log and spaced repetition tool. Record your goals, takeaways and questions, turn selected content into memory cards, and review on a schedule based on each card's review history. THE METHODS BEHIND IT • A goal first (goal setting): one sentence on what you want to work out, so the session has a purpose. • Takeaways and questions after: saying what you learned in your own words is the generation effect; writing down what is still unclear is metacognitive monitoring — how far your understanding goes. • Reviews spaced out (spaced repetition): the FSRS algorithm sets when each card comes back, from your own ratings. STUDY LOGS • Before studying: write a one-sentence goal, or leave it blank. • While studying: use a 15, 20, 25 or 30-minute Pomodoro timer, with an eye-rest reminder at the end. Capture ideas and questions at any time. • After studying: record takeaways and questions in your own words, using voice-to-text or photos of problems. • Add to review: select takeaway cards for review. Question cards can also be added once you have written an answer. SPACED REPETITION During review, rate your recall as "Got it" or "Forgot". The FSRS spaced repetition algorithm uses each card's review history to estimate its next review date and adjusts the interval based on your ratings. Cards repeatedly rated "Forgot" are grouped for reworking. Exam mode lets you link exams and dates to subjects. As an exam approaches, reviews for those subjects become more frequent, with intervals capped at the exam date. RECORDS AND STATISTICS • Voice-to-text: dictate study entries. • Problem photos: attach photos to cards and refer to the original when reviewing. • Knowledge wall: browse recorded takeaways by day. • Streak and Focus Log: track study streaks from actual study activity, daily focus time this week and a study heatmap. No leaderboards, only your past self. • Widgets: view your streak and Library card count on the Home and Lock Screen. • Data export and import: back up the full database as a zip file and import it from a backup. DATA AND PRIVACY Study content is stored on your device by default. If you enable iCloud sync, it is saved to your own iCloud. Crash diagnostics are off by default. You can enable them through a separate checkbox on the first-launch consent screen and change the setting later. When enabled, an installation identifier, device model, OS and app version, and error stack are sent to the developer for troubleshooting. See the Privacy Policy for details. STUDY USES For school study and exam preparation, IGCSE / A-Level / IB, graduate and professional exams, language learning and self-directed study. FREE AND SUBSCRIPTION Free and unlimited: study logs, logging past study, card creation, review, voice input, photos, resolving questions, data export and import, and all Pomodoro chimes. The Knowledge wall and statistics include the last 30 days for free. A subscription unlocks exam mode (countdown and more frequent pre-exam reviews), iCloud sync across devices, full-history Knowledge wall and all statistics, Markdown batch import, and Flip-card practice (choose a set of cards for self-testing without waiting for their due dates). Subscriptions are auto-renewing, monthly or yearly; prices are shown in the app and on the purchase confirmation. Eligible first-time subscribers can receive a 7-day free trial, as determined by the App Store and shown on that same confirmation. Payment is charged to your Apple Account on confirmation of purchase, and renews automatically unless cancelled at least 24 hours before the current period ends. Cancel any time in Settings › your name (Apple Account) › Subscriptions; cancelling during the free trial costs nothing. Privacy Policy: https://junjingxiyu.cn/privacy.en.html Terms of Use: https://junjingxiyu.cn/terms.en.html
Screenshots
Verdict
The clearest difference is update cadence: DuomiFlow at weekly against InkBrook's every 3 weeks. DuomiFlow also leads on device support (3 vs 1). On price, ads, in-app purchases and iOS requirement 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. DuomiFlow sells 3 in-app purchases, starting at $2.99 per 3 months and InkBrook sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.
DuomiFlow ships an update weekly, InkBrook every 3 weeks. The most recent releases landed on October 19, 2026 and September 30, 2026 respectively.
| Parameter | DuomiFlow | InkBrook |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (2 ratings) — better | — |
| Positive reviews | 90.9% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Weekly — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone, iPad, Mac — better | iPhone |
| Requires iOS | 17.5 — better | 18.0 |
| Further details — not scored | ||
| Size | 15 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | 栋君 金 | Dalian Junjing Xiyu Technology Co., Ltd. |
In-app purchases
DuomiFlow
- Quarterly Membership$2.993 Months
- Annual Subscription3 Days trial$4.991 Year
- Lifetime Pro$14.99
InkBrook
- 完整版 · 月7 Days trial$0.991 Month
- 完整版 · 年7 Days trial$4.991 Year









