Light Signals vs Personality Assessor
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Light Signals
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This app lets you talk to the people around you with Morse code flashed from your device's flashlight. Alongside a set of ready-made example phrases, you can register words of your own. In the settings menu, you can adjust the brightness of the flashlight.
Personality Assessor
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Do you work with, live with, or know someone whose behaviour keeps leaving you confused, drained, or manipulated? Personality Assessor gives you a calm, structured, research-based way to make sense of what you are experiencing - and to decide what to do next. START WITH A QUICK CHECK Not sure what you are dealing with? Answer 12 everyday questions about the person, one at a time - "Not sure" is always an option. The Quick Check points you to the patterns worth a closer look, and ticks your "Yes, often" answers for you in the full checklist. SIX RESEARCH-BASED CHECKLISTS โข Narcissistic Personality Disorder (NPD) - 9 DSM-5-TR criteria โข Antisocial Personality Disorder / Sociopathy - 7 DSM-5-TR criteria โข Psychopathy - 20 indicators based on the Hare PCL-R โข Borderline Personality Disorder (BPD) - 9 DSM-5-TR criteria โข Machiavellianism - 9 indicators from Dark Triad research โข Covert (Vulnerable) Narcissism - 9 indicators from clinical research Tick the behaviours you have consistently observed - not isolated incidents. You see how many indicators you noted, what clinical practice would require before a professional could make a diagnosis (for the DSM-based checklists), and plain-language guidance on protecting yourself: stay aware, set boundaries, protect yourself, or limit contact. SEE HOW THINGS CHANGE Every assessment is kept, so you can re-check a pattern over time and see what has changed since last time. INCIDENT JOURNAL (PRO) Write down what happened, when, and how you felt - close to when it happens. Link entries to the behaviours they are an example of, and the journal shows you which patterns keep coming up. Your first 3 entries are free. SUPPORT WHEN YOU NEED IT Where the guidance suggests reaching out, the app lists free, confidential helplines for your region. They are always available in Settings, too - no assessment needed. PRIVATE BY DESIGN No account, no ads, no tracking. Your data is stored on your device and, if you use iCloud, synced through your own private iCloud account. The developer never sees it. FREE AND PRO Every checklist, the Quick Check, your history and the research library are free, for up to 2 people. Pro unlocks the journal without limits and unlimited people - a one-time purchase, with a 14-day free trial. No subscription. Important: Personality Assessor is a lifestyle and professional awareness tool. It is not a medical device and does not provide diagnoses. If you are dealing with a difficult or dangerous situation, please seek professional support.
Screenshots
Verdict
The clearest difference is ads: Personality Assessor at none against Light Signals's shown. Personality Assessor also leads on iOS requirement (18.6 vs 26.1). Light Signals's advantage is update cadence (every 9 days vs every 3 weeks). On price, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Light Signals sells 1 one-off in-app purchase and Personality Assessor sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Light Signals ships an update every 9 days, Personality Assessor every 3 weeks. The most recent releases landed on October 24, 2026 and October 19, 2026 respectively.
| Parameter | Light Signals | Personality Assessor |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 9 days โ better | Every 3 weeks |
| Ads | Yes | No โ better |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad | iPhone, iPad, Mac โ better |
| Requires iOS | 26.1 | 18.6 โ better |
| Further details โ not scored | ||
| Size | 5 MB | 3 MB |
| Age rating | 4+ | 9+ |
| Developer | MIZOU, CO., LTD. | Ralf Koch |
In-app purchases
Light Signals
- Remove Ads$1.99
Personality Assessor
- PA Pro - 14-day TrialFree
- PA Pro - Lifetime$4.99
Questions
Is Light Signals free?
Is Personality Assessor free?
Do Light Signals or Personality Assessor have ads?
Which is updated more often, Light Signals or Personality Assessor?
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