Digit Ratio vs VoxSMS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Anonymous digit ratio measurement
- 2D:4D ratio calculation
- Prenatal hormone exposure marker
- Research data collection
- Personality and cognition studies
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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.
VoxSMS
Communicate via SMS using your dedicated business phone numbers. This app allows you to send and receive text messages directly from your mobile device, integrating seamlessly with your existing service.
- Send and receive SMS
- Use business phone numbers
- Mobile messaging
- Voxtelesys integration
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Send and receive text messages with your Voxtelesys phone numbers.
Screenshots
Verdict
The clearest difference is rating: VoxSMS at 5.0 against Digit Ratio's 1.5. Digit Ratio's advantage is update cadence (weekly vs every 10 months) and iOS requirement (9.0 vs 15.0). On price, ratings volume, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
VoxSMS holds the better App Store score, 5.0 against 1.5. Both are backed by a comparable volume of ratings — 2 and 1 respectively.
Digit Ratio ships an update weekly, VoxSMS every 10 months. Both last shipped on October 24, 2026.
| Parameter | Digit Ratio | VoxSMS |
|---|---|---|
| Price | Free | Free |
| Rating | 1.5 (2 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 2 — better | 1 |
| Update frequency | Weekly — better | Every 10 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 9.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 35 MB | 55 MB |
| Age rating | 4+ | 4+ |
| Developer | Everyware Apps | Textable LLC |
Customer experience
Digit Ratio
VoxSMS
In-app purchases
Digit Ratio
No in-app purchases
VoxSMS
No in-app purchases
