Comparison

Digit Ratio vs TH View

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

Head to head
About

Digit Ratio

This app allows users to anonymously measure their digit ratios (2D:4D), a marker potentially related to prenatal hormone exposure. It collects data for research purposes, contributing to studies on personality and cognition.

Highlights
  • Anonymous digit ratio measurement
  • 2D:4D ratio calculation
  • Prenatal hormone exposure marker
  • Research data collection
  • Personality and cognition studies
Features
Read full description

A now widely studied putative marker for prenatal sex hormones exposure or, more precisely, for the relative exposure to testosterone compared to estrogens while in uterus, is the second-to-fourth digit ratio (2D:4D), that is the ratio between the index (2D) and the ring (4D) fingers. Digit-ratio app is a tool to obtain anonymous measurements of digit ratios (2D:4D). Earlier studies that have stood the test of replication have reported that 2D:4D varies by sex and ethnicity but that male 2D:4D tends to be lower than female 2D:4D in all ethnic groups and the effect is strongest in the right hand. These differences emerge prenatally and appear to be stable during the developing years. While a number of failed replications have been reported, 2D:4D appears to be successfully associated with cognitive abilities, impulsivity, aggression and risk-taking, among other effects on personality and cognition. The objective of the research project is to collect anonymous measurements from multiple individuals. The measurements and profile data may be sent to a server for research purposes. No image will be sent.

About

TH View

Read full description

「TH View」は、温度・温湿度記録計G-TAG(TempView、HygroView)を制御し、温湿度計測を行うためのアプリです。 温度・温湿度記録計で計測したデータをBLE経由で収集し、スマートフォンからメールに添付して送信することが可能です。 ※添付可能なファイル形式は、PDF形式、CSV形式の2種類より選択となります。

Screenshots

Digit Ratio4 screens
TH View2 screens

Verdict

The call

The clearest difference is update cadence: Digit Ratio at weekly against TH View's every 3 weeks. Digit Ratio also leads on iOS requirement (9.0 vs 11.0). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Digit Ratio ships an update weekly, TH View every 3 weeks. The most recent releases landed on June 3, 2026 and September 16, 2026 respectively.

Scorecard2 real differences · 8 level
Digit Ratio versus TH View: the parameters behind the verdict, then further details
ParameterDigit RatioTH View
PriceFreeFree
Rating1.5 (2 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings2 — better—
Update frequencyWeekly — betterEvery 3 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, iPod
Requires iOS9.0 — better11.0
Further details — not scored
Size35 MB13 MB
Age rating4+4+
DeveloperEveryware Technologies S.L.SHINYEI TECHNOLOGY CO.,LTD

In-app purchases

None

Digit Ratio

No in-app purchases

None

TH View

No in-app purchases

Questions

Is Digit Ratio free?
Digit Ratio is free to download, with no in-app purchases.
Is TH View free?
TH View is free to download, with no in-app purchases.
Do Digit Ratio or TH View have ads?
Neither Digit Ratio nor TH View shows ads.
Which is updated more often, Digit Ratio or TH View?
Digit Ratio ships an update weekly, and TH View every 3 weeks. Most recently, Digit Ratio was updated on June 3, 2026 and TH View on September 16, 2026.

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