Sociometry vs Zertifly
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sociometry
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The Sociometry is an application built for The University of Twente. - Application has HealthKit integration. This functionality is optional, it can be disabled in settings menu. It is used to collect participant HealthKit data (heart rate) in psychological studies and to record sessions(meetings) to analyse tone and transcript data. When recording session is finished HealthKit data are consumed.
Zertifly
Prepare for German language exams like TestDaF, Goethe, and telc with structured exercises for reading, listening, writing, and speaking. Features vocabulary tools, progress tracking, and personalized feedback to enhance your learning journey.
- Reading and listening practice
- Writing and speaking exercises
- German vocabulary study tools
- Exam-focused practice activities
- Progress and skill tracking
- Personalized learning support
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Prepare for your German language exams with structured practice for reading, listening, writing and speaking. Zertifly helps learners prepare for TestDaF, Goethe and telc exams with guided exercises, vocabulary tools, progress tracking and personalised feedback. Key features: • Reading and listening practice • Writing and speaking exercises • German vocabulary study tools • Exam-focused practice activities • Progress and skill tracking • Personalised learning support • Optional Zertifly Pro subscription for full access Zertifly is an independent learning platform and is not affiliated with or endorsed by Goethe-Institut, telc gGmbH or TestDaF-Institut. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: Sociometry at none against Zertifly's 1. Sociometry also leads on iOS requirement (9.0 vs 15.1). Zertifly's advantage is update cadence (every 2 weeks vs monthly). On price, ads 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
Both are free to download. Zertifly sells 1 in-app purchase, starting at $14.99 per month. Sociometry asks for nothing beyond the download.
Sociometry ships an update monthly, Zertifly every 2 weeks. The most recent releases landed on October 6, 2026 and October 15, 2026 respectively.
| Parameter | Sociometry | Zertifly |
|---|---|---|
| Price | Free | Free |
| Rating | — | 2.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Monthly | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 14 MB | 41 MB |
| Age rating | 4+ | 4+ |
| Developer | BMSLAB Utwente | Zertifly LTD |
In-app purchases
Sociometry
No in-app purchases
Zertifly
- Zertifly Pro Monthly$14.991 Month
Questions
Is Sociometry free?
Is Zertifly free?
Do Sociometry or Zertifly have ads?
Which is updated more often, Sociometry or Zertifly?
Other comparisons
