So, Depression Test is exactly what it sounds like — a mental health screening tool from Inquiry Health LLC. You'd grab it off the App Store or Google Play if you're feeling off and want a quick, private check-in with your own headspace. I installed it after a rough week when I just needed something more structured than my own spiraling thoughts. First launch, you're hit with a clean, sober interface — no cheerful colors or pushy pop-ups, just a calm, almost clinical white-and-blue palette that feels respectful. It's free to download, though there are in-app purchases for extra features, and the install count sits in the low hundreds of thousands, so it's not a runaway hit but has a dedicated user base. No registration barrier either, which I appreciated; you can just open it and start.

After the first tap, you're guided through the PHQ-9 questionnaire, the standard clinical tool used by therapists. The app walks you through those nine questions about mood, sleep, appetite, and focus over the past two weeks. Each answer is a simple scale from "not at all" to "nearly every day." Honestly, the flow is smooth — you swipe through each question, no lag, no confusing buttons. Once you finish, it spits out a severity score and a plain-English breakdown. I found the results screen a bit jarring, though; seeing a number assigned to your feelings can feel cold. There's a built-in journal for daily mood tracking, which I started using because it lets you free-write alongside the structured scales. A small tip: the app offers anonymous data sharing for research, which you can skip if privacy worries you, but it doesn't nag you about it.

After a few weeks, I think this app works best for people who already suspect they're dealing with depression but want a formal-ish check before talking to a professional. It's less useful if you're just curious or looking for casual mental wellness tips — something like Headspace or Calm covers that ground better. Compared to other screeners like Moodpath or MindDoc, this one feels more barebones, almost like a digital version of the paper questionnaire your doctor hands you. It's not flashy or gamified, which can feel honest or austere depending on your mood. I kept it installed because the journal feature grew on me, but I can see someone uninstalling it after the first test if they just wanted a one-time verdict. It's a tool, not a companion, and that's both its strength and its limit.

• 📝 The standout feature is the clinically validated PHQ-9 questionnaire, which is the same tool used in doctor's offices. Unlike Sanvello or Youper, which blend screening with general life coaching, this app keeps the focus sharp and medical. No fluff, no calming animations — just the test, your score, and a clear interpretation. You finish in under five minutes and get something actionable.
• 📈 The trend tracking is another highlight. After your initial screening, you can re-take the test weekly and watch your score plot on a simple graph. This beats something like Daylio, where mood tracking is tied to activities but lacks clinical anchoring. Here, you're tracking a symptom, not just a vibe, which makes it useful for sharing with a therapist.
• 🔒 Privacy is treated seriously. The app doesn't ask for an email or a name unless you want to back up data, and all responses live locally on your device. Compare that to BetterHelp's companion apps, which often push for account creation and phone number verification. This feels like a locked journal rather than a data-collection funnel.

• ✅ It's direct and no-nonsense. No onboarding quiz or personality test — just the core tool. This beats apps like What's My Mental Health? which bury the PHQ-9 behind fluff pages and self-promotion. You open it, you test, you understand.
• ✅ The free version is genuinely useful. You get unlimited PHQ-9 tests and basic journaling without paying a dime. Apps like MindDoc lock advanced features like progress charts behind a subscription, while this one keeps the clinical core open.
• ✅ It's therapist-friendly. The output includes a severity score and a risk note for self-harm, which is exactly what a clinician wants to see. Apps like Moodpath give you more general wellness advice, but this one hands you data a professional can use immediately.

• ❌ The app lacks community or support features. If you want to talk to someone after a high score, you're left with a phone number for a hotline. Sanvello or 7 Cups offer chat rooms and peer support right in the app, which can feel more comforting when the test hits hard.
• ❌ The journal is basic compared to competitors. Daylio lets you add custom activities, tags, and photo entries. Here, it's just a blank text box. If journaling is your main draw, this will feel sparse after a week.
• ❌ There's no CBT or coping toolkit. Apps like Moodpath provide daily exercises and psychoeducation based on your score. After you get your depression level here, the app hands you the number and says "go see a doctor." That's responsible clinically, but emotionally, it can feel like being dropped off at a street corner.