Comparison

III vs 化学大师

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

Head to head
About

III

Calculate material properties for III-V compound semiconductors like AlGaInAsP. It determines compositions, lattice constant, strain, bandgap, and effective masses for InP or GaAs substrates.

Highlights
  • III-V compound semiconductor calculations
  • Material property determination
  • Composition calculation (x, y, z)
  • Lattice constant and strain analysis
  • Bandgap and effective mass calculation
  • Supports InP and GaAs substrates
Features
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Application to calculate the compositions and material properties of a III-V compound semiconductor. Either InP or GaAs is assumed for the substrate. Some of the compositions and material parameters of the AlGaInAsP compound semiconductor are specified to determine the remain unknown parameters. The following properties are shown as a result: compositions (x, y, z), lattice constant, strain, bandgap, relative energy positions of the conduction and valence bands, and effective masses of the electron and holes.

About

化学大师

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#化学大师,格物致知# 全国超800万初高中学生选择!在线视频学习,作业辅导的不二之选!预习+精讲+练习+复习 大师帮你统统搞定! 限时活动:0元领各科精讲课! 【专业的内容】 -预习课:趣味预习视频, 5分钟学一个知识点 -干货课:名师精炼,深入解读课本知识点 -习题课:一个知识点一套精选练习题,边学边练,高效学习 【丰富的功能】 ① 内容同步校内教材:小学语文、初中物理、初中化学、初中数学、高中物理、高中数学、高中化学这里都有,紧跟课本教材,单一知识点,考点、难点、重点一一讲解!预习、复习、考试、日常学习大师全搞定! ② 精彩内容:大片式课程,精美的动画视频,动听的音效音乐,内容生动有趣,更好理解。课本知识结合日常生活,娓娓道来,知识点不再抽象! ③ 大师原创题库:创新视频式互动做题体验,边做题边听讲解,做题原来可以这么轻松~ ④ 专项真人课:名师真人出镜,倾情教学。阶梯型学习设计方案满足每个同学进步的需要。 ⑤ 心悦FM: 用声音告诉你这么高效学习,不走学习岔路! 【有难题,call大师】 预习没方法?课前3~5分钟趣味生动动画视频,知识点,重难考点一一剖析,轻松预习,上课不再听不懂! 解题没思路?大师精选海量课后练习题,名师一对一讲解辅导,由易到难,帮助掌握思考框架,教会你举一反三,学习不再陷入恶循环~ 考试没信心?视频学习,预习,复习,练习,一课三练,应对考试一把好手~ 【粉丝寄语】 —物理大师、化学大师、数学大师系列课程都用过,十分强大,不仅内容全面,而且形式有趣,很好用的学习app! —十分nice的学习软件,基础课程都是免费的,视频风趣幽默,容易理解,充分结合生活知识,学起来很带劲,很有趣~ —以前是一个理科学渣,现在是一个理科学霸!不管你是学渣还是学霸都应该用大师APP! —作为一名老师,不得不说,大师系列教学视频对于课堂教学很有帮助,通过视频的形式把抽象的理科知识讲解清楚,这个想法确实值得借鉴! 【联系我们】 官方微信公众号:dashiyibai(大师一百) 客服热线:4008120718 官方QQ群:428991899

Screenshots

III4 screens
化学大师4 screens

Verdict

The call

The clearest difference is price: 化学大师 at Free against III's $2.99. 化学大师 also leads on update cadence (every 5 months vs every 17 months). III's advantage is in-app purchases (none vs 10). On ads, device support 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

CostPrice · In-app purchases · Ads · Monetization

化学大师 is free to download; III costs $2.99 up front. 化学大师 sells 10 one-off in-app purchases. III asks for nothing beyond the download.

UpkeepUpdate frequency

III ships an update every 17 months, 化学大师 every 5 months. The most recent releases landed on October 30, 2026 and October 26, 2026 respectively.

Scorecard3 real differences · 7 level
III versus 化学大师: the parameters behind the verdict, then further details
ParameterIII化学大师
Price$2.99Free — better
Rating4.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 17 monthsEvery 5 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better12.0
Further details — not scored
Size10 MB40 MB
Age rating4+9+
DeveloperTakuya IshikawaHangzhou WuJie Network Technology Co.,Ltd.

In-app purchases

None

III

No in-app purchases

10 purchases

化学大师

One-time10
  • 初中数学一年会员$124.99
  • 初中物理一年会员$124.99
  • 初中化学一年会员$124.99
Show 7 more
  • 初中语文一年会员$124.99
  • 小学科学一年会员$124.99
  • 初中数理化半年会员$124.99
  • 高中数学一年会员$199.99
  • 高中化学一年会员$199.99
  • 高中物理一年会员$199.99
  • 高中数理化一年会员$399.99

Questions

Is III free?
III costs $2.99, with no in-app purchases.
Is 化学大师 free?
化学大师 is free to download, with in-app purchases available.
Do III or 化学大师 have ads?
Neither III nor 化学大师 shows ads.
Which is updated more often, III or 化学大师?
III ships an update every 17 months, and 化学大师 every 5 months. Most recently, III was updated on October 30, 2026 and 化学大师 on October 26, 2026.

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