Comparison

i花椒 vs cella

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

Head to head
About

i花椒

Features
Read full description

i花椒是为华东交通大学广大师生专门研发的一款学习型软件,该APP为广大师生提供一个便捷的学习平台,让用户可以通过软件轻松获取大量学习资料,包含专业课程信息、图书馆借阅等功能,为用户学习和教学提供帮助。I花椒客户端是面向智能手机、平板电脑等移动终端的移动学习专业平台。用户可以在I花椒客户端上自助完成图书馆藏书借阅查询、电子资源搜索下载、图书馆最新资讯浏览,学习学校专业课程,进行小组讨论,查看本校通讯录,进行课表和成绩查询等服务,同时拥有超过百万册电子图书,海量报纸文章以及中外文献元数据,为用户提供方便快捷的移动学习服务。

About

cella

Explore crystal structures in interactive 3D. Visualize atomic arrangements, view different molecular models, and access a curated atlas of common materials. Supports CIF file import and export with a one-time purchase.

Highlights
  • Interactive 3D crystal exploration
  • Fifteen visual Cell Notes
  • Curated structure atlas
  • Multiple view modes (ball-and-stick, space-filling)
  • Unit cell and (hkl) plane visualization
  • CIF file import and export (Pro)
  • No ads, tracking, or analytics
Features
Read full description

Open a supported CIF file and explore its structure in interactive 3D. cella brings crystal data, fifteen visual Cell Notes, and a curated structure atlas into one focused workspace for iPhone and iPad. READ THE STRUCTURE Fifteen Cell Notes connect familiar materials to the lattice beneath them. Follow salts, metals, carbon structures, and semiconductors through concise visual stories, then open the related crystal in 3D to inspect the model yourself. EXPLORE IN 3D • Rotate, zoom, and pan • Tap atoms to read element names, sites, and fractional coordinates • Switch between ball-and-stick, space-filling, and coordination-polyhedra views • Show the unit cell and (hkl) planes • Build a×b×c supercells USE THE BUILT-IN ATLAS Start with 20 free structures. The collection covers rock salt, diamond, graphite, fluorite, perovskites, common metals, and other teaching examples. Pro unlocks all 58 built-in structures. IMPORT AND EXPORT WITH PRO A one-time purchase unlocks supported CIF import, the full atlas, and high-resolution transparent PNG export. There is no subscription. CIF compatibility depends on file content. Unsupported or malformed files are reported in the app. Review labels and geometry before using exported images in research or publication. PRIVATE BY DESIGN No account, ads, tracking, or analytics. CIF files are processed on your device and never uploaded. Apple StoreKit may use an internet connection to load Pro availability, process purchases, or restore entitlements.

Screenshots

i花椒4 screens
cella4 screens

Verdict

The call

The clearest difference is in-app purchases: i花椒 at none against cella's 1. i花椒 also leads on iOS requirement (9.0 vs 17.0). cella's advantage is update cadence (every 10 days vs every 6 months). 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. cella sells 1 one-off in-app purchase. i花椒 asks for nothing beyond the download.

UpkeepUpdate frequency

i花椒 ships an update every 6 months, cella every 10 days. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level
i花椒 versus cella: the parameters behind the verdict, then further details
Parameteri花椒cella
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 6 monthsEvery 10 days — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Freemium
DevicesiPhone, iPodiPhone, iPad
Requires iOS9.0 — better17.0
Further details — not scored
Size188 MB71 MB
Age rating12+4+
Developer华东交通大学武汉回到未来科技有限公司

In-app purchases

None

i花椒

No in-app purchases

1 purchases

cella

One-time1
  • cella Pro$5.99

Questions

Is i花椒 free?
i花椒 is free to download, with no in-app purchases.
Is cella free?
cella is free to download, with in-app purchases available.
Do i花椒 or cella have ads?
Neither i花椒 nor cella shows ads.
Which is updated more often, i花椒 or cella?
i花椒 ships an update every 6 months, and cella every 10 days. Most recently, i花椒 was updated on November 2, 2026 and cella on October 31, 2026.

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