Comparison

Standard Deviation Calc vs GPD

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

Head to head
About

Standard Deviation Calc

Calculate standard deviation for sample or population data. Input numerical values to find standard deviation, count, sum, mean, variance, and more. Get quick statistical insights with this easy-to-use tool.

Highlights
  • Calculate standard deviation
  • Sample or population data
  • Compute mean and variance
  • Count numerical values
  • Sum of numbers
  • List of differences
Features
Read full description

Use this app to calculate standard deviation for a population or sample data set. Enter your numerical values, and the app will instantly calculate standard deviation, variance, mean, count, sum, and other supporting statistics. Results are estimates for informational purposes only. We are very happy to serve you. If you have any requests, don't hesitate to contact us. - https://www.facebook.com/phan.nhatdang.3/ - phannhatd@gmail.com

About

GPD

This app helps farmers assess planting uniformity by measuring seed spacing. It calculates the Coefficient of Variation (CV%) and analyzes distribution regularity, identifying acceptable spacing, doubles, and skips to improve crop yield.

Highlights
  • Measures seed spacing uniformity
  • Calculates Coefficient of Variation (CV%)
  • Analyzes distribution regularity (acceptable, doubles, skips)
  • Identifies causes of planting errors
  • Aids in improving plantability
Features
Read full description

Criado por: Júlio César Santos Pereira DEFINIÇÃO DO APLICATIVO: Este aplicativo foi desenvolvido para ajudar o produtor a avaliar a importância de mensurar cada linha do seu plantio e garantir uma melhor plantabilidade. A Distribuição Longitudinal, pode ser mensurada através de alguns parâmetros, sendo os principais o Coeficiente de Variação (CV%) e a regularidade de distribuição (aceitável, duplas e falhas) COEFICIENTE DE VARIAÇÃO: O coeficiente de variação é definido pela medida de dispersão dos espaçamentos entre sementes e/ou plantas em relação a média. Quanto maior for o valor de CV% maior é a variação em relação a média, ou seja, aumenta a irregularidade de distância entre as plantas. REGULARIDADE DE DISTRIBUIÇÃO: Outro parâmetro de qualidade da Plantabilidade é a regularidade de distribuição de plantas pode ser classificada em espaçamentos aceitáveis, duplas e falhas. Aceitável: Quando a distância entre as plantas for maior que 0,5 e menor que 1,5 vezes a distância ideal Dupla: Quando a distância entre as plantas for menor que 0,5 vezes a distância ideal Falha: Quando a distância entre as plantas for maior que 1,5 vezes a distância ideal CAUSAS DE ERRO: As causas de falta de uniformidade no plantio vão desde a velocidade do plantio, problemas com o disco dosador de sementes, regulagem geral da semeadora, profundidade uniforme de deposição de sementes, fechamento do sulco do plantio, manutenção da semeadora, etc. Instagram: @grupodeplantiodireto

Screenshots

Standard Deviation Calc3 screens
GPD4 screens

Verdict

The call

The clearest difference is review sentiment: GPD at 100% against Standard Deviation Calc's 0%. GPD also leads on in-app purchases (none vs 1) and update cadence (every 2 months vs every 5 months). On price, 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

Both are free to download. Standard Deviation Calc sells 1 one-off in-app purchase. GPD asks for nothing beyond the download.

UpkeepUpdate frequency

Standard Deviation Calc ships an update every 5 months, GPD every 2 months. The most recent releases landed on October 8, 2026 and October 5, 2026 respectively.

Scorecard4 real differences · 6 level
Standard Deviation Calc versus GPD: the parameters behind the verdict, then further details
ParameterStandard Deviation CalcGPD
PriceFreeFree
Rating3.7 (11 ratings) — better—
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings11 — better—
Update frequencyEvery 5 monthsEvery 2 months — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.0 — better15.0
Further details — not scored
Size2 MB20 MB
Age rating4+4+
DeveloperPhan Nhat ĐangCharles Steinmetz

Customer experience

Standard Deviation Calc

All ratings11 ratings
Positive63.6%
Neutral9.1%
Negative27.3%
Written reviews2 reviews
Positive0.0%
Neutral50.0%
Negative50.0%

GPD

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Standard Deviation Calc

One-time1
  • Remove ads$1.99
None

GPD

No in-app purchases

Questions

Is Standard Deviation Calc free?
Standard Deviation Calc is free to download, with in-app purchases available.
Is GPD free?
GPD is free to download, with no in-app purchases.
Do Standard Deviation Calc or GPD have ads?
Neither Standard Deviation Calc nor GPD shows ads.
Which is updated more often, Standard Deviation Calc or GPD?
Standard Deviation Calc ships an update every 5 months, and GPD every 2 months. Most recently, Standard Deviation Calc was updated on October 8, 2026 and GPD on October 5, 2026.

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