Comparison

Exponential Growth Decay PRO vs 小教练

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

Head to head
About

Exponential Growth Decay PRO

Calculate future values using exponential growth and decay functions. Input starting and resulting values, growth factor, rate, or percentage to find missing variables. Visualize results with graphs and infographics, with step-by-step solutions.

Highlights
  • Calculate growth factor, rate, or percentage
  • Step-by-step solution display
  • Graph visualization of functions
  • Infographic parameter explanation
  • History of calculations
  • Support for decimals, fractions, and negative values
Features
Read full description

The growth function uses exponentiation to determine a value which will be achieved in the future. This app allows to enter a starting value, a resulting value, growth factor, growth rate, percentage rate and a time value. To lower the complexity the calculations of the growth factor, growth rate and the percentage rate are divided in 3 different modes. The missing value will be calculated step by step. If it growths or decays depends on the input you deliver. The app also creates a graph to give an impression of your function. An infographic shows how your input affects the growing or decaying of your starting value. Decimals, fractions and negative values are supported. The solution is shown step by step. All calculations are stored in the history. The final solution can be shared. [ Contents ] - modes for considering the growth factor, growth rate or percentage rate - the missing value will be calculated - results are calculated and shown in detail - infographic to explain the parameters - a graph of your function - history function to save the input - detailed solution - negative values, decimal numbers and fractions are supported - no ads! [ Usage ] - there are fields for entering values using a special keyboard - press the check mark button at the bottom right to start the calculation - if values are missing, the relevant field is highlighted in yellow - if the values are wrong, the affected field will be highlighted in red - the entries in the history can be deleted or sorted - if you select an entry in the history, it will be automatically loaded for the calculation - the whole history can be deleted by pressing a button - solutions can be shared - touching the question mark button displays information about the topic

About

小教练

Features
Read full description

小教练帮家长拍小学生体育作业:自动数次数,生成成绩视频,坚持每天打卡。 跳绳一分钟、仰卧起坐、开合跳、深蹲、高抬腿、俯卧撑、平板支撑,不用一边举着手机一边自己数。 拍完就能交作业 拍完点「分享成绩视频」,生成一段带骨骼线、计时和实时次数的视频,片尾有成绩卡,可以直接发到家长群、班级群或交给老师。文件名自带运动、时长和次数,老师批量下载也一眼看清。次数不对可以手动校正,片尾会写明。也能生成一张成绩海报。 怎么拍 选一项运动,选计时(比如 1 分钟)、计数(比如 100 下)或自由练,把手机立稳。开拍前会先检查是否全身入镜,然后语音倒计时。可以边拍边看次数,也可以先专心拍完再逐帧计算。相册里已经拍好的视频,也能直接拿来数。 看懂成绩 结果页显示平均速度、最多连续、断绳次数、每 10 秒的次数,以及和上次比、个人最好。填上孩子的年级和性别,1 分钟跳绳和仰卧起坐会按《国家学生体质健康标准》显示参考等级和离下一档还差几下。在设置里按年级填上学校的一分钟达标次数,还能直接看到有没有达标。 坚持打卡 把老师布置的作业记下来,比如「跳绳 1 分钟 × 3 组,每天」,做了几组自动统计,做完一键把几组合成一段视频。还有打卡日历、连续天数、每日目标、每天提醒、周报和勋章,桌面小组件随时看今天练了没有。家里几个孩子可以分别记录。 大人也能用 添加练习的人时选「大人」,首页换成自己的每日计划,不显示作业、体测和学校标准。深蹲、俯卧撑、平板支撑这些健身动作一样自动计数,也能生成成绩视频。 次数怎么算 · 跳绳:身体上下跳一下,算一次。绳子不用入镜。 · 仰卧起坐:从侧面拍,坐起来再躺下,算一次。 · 开合跳:手脚张开再收回,算一次。 · 深蹲:蹲下去再站直,算一次。 · 高抬腿:膝盖抬到接近腰的高度,左右腿各算一次。 · 俯卧撑:从侧面拍,撑下去再撑起来,算一次。 · 平板支撑:从侧面拍,身体保持一条直线时计秒。 视频存在哪 视频和所有记录只保存在这台 iPhone 里,不会上传,也不需要账号。只有你自己点分享或保存,视频才会离开 App。 请了解 这是设备端的动作估算,不是裁判器。半身入镜、遮挡、动作不标准时,可能漏数或多数,可以手动校正。一分钟 200 下的快跳,请用「拍完再数」。跳绳按髋部起伏计数,双摇一次通常仍算 1。体测等级仅供参考,以学校测评为准。 小教练 Pro 拍摄计数、成绩视频、作业和打卡一直免费。体测参考等级、学校标准、节奏分析、成绩海报、周报、桌面小组件、成绩视频去角标、几组合成一段、多个孩子分开记,属于一次买断的「小教练 Pro」。新用户可以先免费试用 7 天,开了家庭共享全家都能用。 无账号、无广告、不订阅。

Screenshots

Exponential Growth Decay PRO4 screens
小教练4 screens

Verdict

The call

The clearest difference is price: 小教练 at Free against Exponential Growth Decay PRO's $1.99. 小教练 also leads on update cadence (every 3 days vs monthly). Exponential Growth Decay PRO's advantage is in-app purchases (none vs 1) and device support (3 vs 1). On ads 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

小教练 is free to download; Exponential Growth Decay PRO costs $1.99 up front. 小教练 sells 1 one-off in-app purchase. Exponential Growth Decay PRO asks for nothing beyond the download.

UpkeepUpdate frequency

Exponential Growth Decay PRO ships an update monthly, 小教练 every 3 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard5 real differences · 3 level
Exponential Growth Decay PRO versus 小教练: the parameters behind the verdict, then further details
ParameterExponential Growth Decay PRO小教练
Price$1.99Free — better
Positive reviews0.0% of reviews—
Update frequencyMonthlyEvery 3 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better17.0
Further details — not scored
Size180 MB3 MB
Age rating4+4+
DeveloperGlindemann, Sennoun, Langer GbRdeng yongyuan

In-app purchases

None

Exponential Growth Decay PRO

No in-app purchases

1 purchases

小教练

One-time1
  • 小教练 Pro$4.99

Questions

Is Exponential Growth Decay PRO free?
Exponential Growth Decay PRO costs $1.99, with no in-app purchases.
Is 小教练 free?
小教练 is free to download, with in-app purchases available.
Do Exponential Growth Decay PRO or 小教练 have ads?
Neither Exponential Growth Decay PRO nor 小教练 shows ads.
Which is updated more often, Exponential Growth Decay PRO or 小教练?
Exponential Growth Decay PRO ships an update monthly, and 小教练 every 3 days. Most recently, Exponential Growth Decay PRO was updated on November 3, 2026 and 小教练 on October 31, 2026.

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