Comparison

小花 Xiaohua vs The Formula Calculator

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

Head to head
About

小花 Xiaohua

Features
Read full description

小花 Xiaohua — TCM Clinical Handbook Check the almanac, read the classics, memorize formula verses and look up formulas, herbs and acupoints — and jot down whatever's on your mind. Everything is built in and works offline. Made for iPhone Duo: keep Today on the cover, and open into split Reading, Notes and Medical layouts. HOME — Daily almanac & sky · Weather: current conditions and a 3-day forecast (Apple WeatherKit) · Almanac: lunar date, day pillar, do/don't, and more · Five Movements & Six Qi: yearly movement, Sitian/Zaiquan and current qi step · Sky: moon phase and the 24 solar terms · BaZi: four pillars, ten gods and luck cycles READING — Reference library · Classics: Suwen, Lingshu, Shanghanlun, Jingui, Wenbing and more in full, with a clause reader (progress, font size, paper/night themes, bookmarks) · Recitation levels: clauses graded 1-3 against the official TCM classics exam syllabus, browsable by level — built for exam prep · Formula handbook: five classical verse collections (Tangtou Gejue, Shifang Gekuo, Changsha Gangekuo, Jingui Gangekuo, Shanbu Mingyi Fanglun) — recite or search · Formulas / Herbs / Acupoints: fully bundled; search by Chinese, pinyin or English · Unified search and favorites NOTES — card-based notes · Card feed, #tags, stars, archive and images (encrypted on device) · Save web pages or articles from the system share sheet · Timed reminders (optionally mirrored to the system Reminders app) PRIVACY · No account required; data stays on your device by default · Images and text encrypted (AES-GCM); optional iCloud private-database sync (end-to-end encrypted) · No ads, no third-party analytics SDKs Content is for study and reference only and is not medical advice.

About

The Formula Calculator

This app serves as a comprehensive formula library and calculator, designed for tradespeople, engineers, and students. It offers over 200 formulas across various scientific disciplines, with automatic unit conversion and offline functionality.

Highlights
  • Extensive formula library (200+)
  • Automatic unit conversion
  • Offline functionality
  • Searchable formulas and elements
  • Light and dark mode
  • Multi-language support
Features
Read full description

Select a formula, enter the values – the app calculates the rest. Units convert automatically. Formula Calculator is a formula library and a calculator in one. Instead of looking things up in a handbook and then calculating separately, both happen in the same view. Built for the trades, master craftsman training, engineering and study. Over 200 formulas, including: Geometry and areas, volume, mechanics and strength of materials, heat, fluid mechanics and pumps, electrical engineering, acoustics, hydraulics, chemistry and physics. Use the formulas, instead of leaving everything to AI: Periodic table (use molar mass directly), density table, building materials, formula symbols as in a technical handbook, unit converter with SI prefixes. Charts such as LogPH and h-x. Search finds formulas, elements and groups – for example Ohm, area of a circle, alkali metals or the periodic table. • Fully offline • No account, no ads, no tracking • Light and dark mode • German and many other languages • Saves recent calculations Developed by a German master craftsman. Available languages: German, English, French, Spanish, Portuguese, Italian, Dutch, Polish, Czech, Slovak, Hungarian, Romanian, Croatian, Danish, Swedish, Norwegian, Finnish, Turkish, Russian, Ukrainian, Arabic, Hebrew, Hindi, Thai, Vietnamese, Indonesian, Chinese, Japanese, Korean Also on Apple Watch: a simplified version for quick lookup or calculations with units.

Screenshots

小花 Xiaohua4 screens
The Formula Calculator3 screens

Verdict

The call

The clearest difference is iOS requirement: The Formula Calculator at 15.0 against 小花 Xiaohua's 17.0. On price, update cadence, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

小花 Xiaohua ships an update weekly, The Formula Calculator every 5 days. Both last shipped on November 10, 2026.

Scorecard1 real difference · 7 level
小花 Xiaohua versus The Formula Calculator: the parameters behind the verdict, then further details
Parameter小花 XiaohuaThe Formula Calculator
PriceFreeFree
Positive reviews—100.0% of reviews
Update frequencyWeeklyEvery 5 days — better
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.0 — better
Further details — not scored
Size16 MB9 MB
Age rating4+4+
DeveloperDA JISidney Thom

In-app purchases

None

小花 Xiaohua

No in-app purchases

None

The Formula Calculator

No in-app purchases

Questions

Is 小花 Xiaohua free?
小花 Xiaohua is free to download, with no in-app purchases.
Is The Formula Calculator free?
The Formula Calculator is free to download, with no in-app purchases.
Do 小花 Xiaohua or The Formula Calculator have ads?
Neither 小花 Xiaohua nor The Formula Calculator shows ads.
Which is updated more often, 小花 Xiaohua or The Formula Calculator?
小花 Xiaohua ships an update weekly, and The Formula Calculator every 5 days. Most recently, 小花 Xiaohua was updated on November 10, 2026 and The Formula Calculator on November 10, 2026.

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