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✉️ support@truedoubt.co.ukHow to Play
STEP 01
Read the Briefing
Each case starts with a briefing — suspects, the incident, and the basic facts.
STEP 02
Study the Evidence
Tap any evidence card to read it. Mark anything suspicious using your 10 Doubt Points.
STEP 03
Find the Contradiction
Tap Contradiction, then select two pieces of evidence that can't both be true.
STEP 04
Submit Your Theory
Name your culprit, tag the key evidence, and submit. Your score reveals how sharp you were.
Frequently Asked Questions
Yes. True Doubt is free to download. One full case per difficulty tier (Easy, Medium, Hard) is completely free — no account, no sign-in required. A one-time purchase unlocks all 54 cases and 10 crime scenes (£1.99, once) plus new cases as they are added.
No. True Doubt is a single one-time purchase (£1.99) that unlocks everything for life. There are no subscriptions and nothing renews. Refund requests are handled by Apple at support.apple.com/billing.
Tap any locked case to bring up the paywall, then tap Restore Purchases at the bottom. Make sure you're signed in to the same Apple ID used when you originally purchased.
You start each case with 10 Doubt Points. Marking a piece of evidence as suspicious costs 1 point. If you mark the wrong evidence, you lose 5 points from your final score. Use them wisely — any points you don't spend give you a small bonus at the end.
All three tiers use the same 18 scenarios, but with completely different suspects, evidence, culprits, and contradictions. Easy has clearer contradictions and more obvious guilty parties. Medium adds more suspects and evidence. Hard introduces conspiracy outcomes and multiple culprits.
Scores are out of 100:
+40 — correct culprit
+25 — contradiction found
+25 — key evidence tagged (proportional)
−5 per false doubt (marking irrelevant evidence)
+up to 10 — unused doubt points saved
Verdicts: CRACKED (85+), SOLVED (65–84), PARTIAL (45–64), COLD CASE (below 45).
+40 — correct culprit
+25 — contradiction found
+25 — key evidence tagged (proportional)
−5 per false doubt (marking irrelevant evidence)
+up to 10 — unused doubt points saved
Verdicts: CRACKED (85+), SOLVED (65–84), PARTIAL (45–64), COLD CASE (below 45).
Yes. Any case can be replayed unlimited times. Your best score is saved. Free cases and unlocked cases can be replayed forever.
App Lock lets you protect True Doubt with Face ID or Touch ID. It can be enabled in Settings (tap the gear icon on the home screen). When enabled, the app will ask for biometrics when you return from the background. This feature is entirely optional and off by default.
No. True Doubt collects no personal data. All progress is stored locally on your device. We have no servers and no analytics. See our full Privacy Policy for details.
Email us at support@truedoubt.co.uk with a description of the issue and your iOS version. We'll look into it as quickly as possible.