Comparison

HayaFlow vs Boki Lens

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

Head to head
About

HayaFlow

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HayaFlow is a simple flowchart app designed to help you think in flows. No complex setup required. Start drawing the moment an idea comes to mind, and instantly turn it into a structured flow. With intuitive and responsive interactions, you can capture and organize your thoughts without breaking your thinking process. Key Features:  • Simple and intuitive interface  • Fast and smooth performance  • Instantly turn ideas into flowcharts  • Link flows and navigate between them quickly  • Perfect for thinking, workflow design, and logic structuring Recommended for:  • Organizing your thoughts  • Structuring workflows and processes  • Turning ideas into visual flows quickly  • Anyone looking for a simple and fast tool In-App Purchase: A one-time purchase is available to unlock full editing features. You can restore your purchase on devices using the same Apple ID. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://sites.google.com/view/hayaflow/privacypolicy

About

Boki Lens

Features
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Learn profit, cash and financial statements through business examples in English and USD. Start free with 8 lessons and 24 questions; Premium adds 24 lessons. No app account required. JAPANESE GRADE 3 PRACTICE Available in the Japan course with the Japanese interface: explanations, worked examples, answer entry, review and original 60-minute mock exams. Learn how transactions connect profit, assets and cash. Practice answers and exam sessions are saved locally, not synced via iCloud. LEARN AND PRACTICE IN ENGLISH Global Basics has 8 chapters, 32 lessons and 96 questions in English and USD. Read explanations, explore worked examples and use Practice. Three drills cover account classification, debit/credit and journal entries. Today shows your next lesson and spaced reviews. TRY IT FREE Global Basics includes 8 free lessons and their 24 questions, the Cash or Invoice case, Journal Entry, the three core drills, and 3 company diagnoses. Premium unlocks the remaining 24 lessons and access to all 96 course questions. READ STATEMENTS AND RUN A COMPANY Explore 20 fictional company diagnoses: 3 free and 17 with Premium. Review related lessons and try a related business decision. Make quarterly decisions, post transactions, and review statements across 18 companies: Independent consultant is free; the other 17 require Premium. Close a year and continue into the next. Completed years and unfinished runs are saved on this device. EXPLORE THE JAPAN COURSE A cafe-based course uses JPY and Japanese bookkeeping conventions, with English and Japanese text. Stage 0–10, three core quiz modes, and Journal Entry are free. Three fictional industry case studies and three Year-in-Business runs are also free; Premium adds 17 of each. Workplace Starter connects financial statements to profit, cash, and later customer payments. Switch courses from Learn or Settings. Each keeps separate progress and practice journals. Global teaching content stays in English, including when the app interface is Japanese. PREMIUM One monthly, auto-renewing subscription includes the additional Global lessons, 17 Global company diagnoses, 17 Global company careers, and the Japan-course activities above. The local App Store price is shown before purchase. Manage or cancel in your Apple account settings; restore purchases in the app's Settings. OFFLINE AND ICLOUD Core learning works offline, with data saved on your device. Lesson progress, review history, and practice journals in both courses can sync via iCloud on devices using the same Apple Account with iCloud Drive enabled. Changes may take time to appear. No ads or advertising tracking. Dynamic Type and dark mode are supported. Fictional company data is for learning. Global Basics uses the assumptions stated in its lessons and does not provide country-specific tax advice or comprehensive US GAAP, IFRS, or certification-exam coverage. Privacy Sharing usage is optional. After you explicitly allow it, TelemetryDeck receives a random local ID's hash, random session ID, app version/build, test status, and screen, feature, learning and purchase-success events. Events may include language, track/content version, stage/lesson IDs, lesson/purchase entry categories, answer/correct counts, plan and product ID. Before consent, no events are sent or saved and no analytics ID is created. If you decline, all features remain available. Withdraw under Settings > Optional analytics to stop sending, remove the ID, and delete or invalidate unsent events. Withdrawal does not delete sent events; see the Privacy Policy for retention. We send no region/country/raw locale, screen text, transaction IDs, prices, Apple IDs, journal contents, amounts, free text, names or contacts. No advertising SDKs; analytics is not linked to you or used for ads/tracking. - Privacy Policy: https://minimalist-lab.github.io/app-info/bokilens_privacy_en.html - Terms of Use (EULA): https://minimalist-lab.github.io/app-info/bokilens_terms_en.html

Screenshots

HayaFlow2 screens
Boki Lens4 screens

Verdict

The call

HayaFlow and Boki Lens are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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. HayaFlow sells 1 one-off in-app purchase and Boki Lens sells 1 in-app purchase, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

HayaFlow ships an update every 4 days, Boki Lens every 3 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

ScorecardNo meaningful differences
HayaFlow versus Boki Lens: the parameters behind the verdict, then further details
ParameterHayaFlowBoki Lens
PriceFreeFree
Update frequencyEvery 4 daysEvery 3 days — better
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad, Mac — betteriPhone, iPad
Requires iOS1818.0
Further details — not scored
Size26 MB14 MB
Age rating4+4+
DeveloperMasato HayashiMASATO NISHIURA

In-app purchases

1 purchases

HayaFlow

One-time1
  • HayaFlow Unlock Full Function$2.99
1 purchases

Boki Lens

Subscriptions1
  • Premium (Monthly)$2.991 Month

Questions

Is HayaFlow free?
HayaFlow is free to download, with in-app purchases available.
Is Boki Lens free?
Boki Lens is free to download, with in-app purchases available.
Do HayaFlow or Boki Lens have ads?
Neither HayaFlow nor Boki Lens shows ads.
Which is updated more often, HayaFlow or Boki Lens?
HayaFlow ships an update every 4 days, and Boki Lens every 3 days. Most recently, HayaFlow was updated on November 5, 2026 and Boki Lens on October 31, 2026.

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