{"observation":{"id":"e1c671b1-a7b3-43dc-934e-5e02e99928e0","tool":"akool","tool_name":"AKOOL","criterion":"voice-quality","criterion_name":"Voice quality","criterion_definition":"Natural-sounding voice that matches the avatar, with correct emphasis and a convincing real-creator feel.","criterion_evidence_type":"transformation","criterion_rank_role":"decisive","criterion_rank_role_reason":"A convincing, natural voice is part of whether the ad feels like a real creator video rather than AI output. (3 of 3 judges)","scenario":"duolingo-mobile-app","scenario_name":"Duolingo – Mobile App","group_tag":"ugc-style-video-ads","scenario_description":"A short-form UGC promo prompt for a consumer mobile app, designed to test whether the tool can explain app benefits simply and persuasively while generating a realistic AI-presenter video.","modality":"mixed","input_text":"Product URL: https://www.duolingo.com/\n\nExact script:\nHook: Learning a new language has never been this easy.\nScript: I've been using Duolingo for a few minutes every day, and it's made language learning simple and fun. The short lessons are easy to follow, and the daily practice keeps me motivated. If you're planning to learn a new language, give Duolingo a try.\n\nOutput requirements:\n- Vertical (9:16)\n- 20–30 seconds\n- UGC-style AI presenter\n- Natural AI voice\n- Captions enabled","input_artifact_refs":[],"stresses":["Mobile app understanding","Consumer app promotion","Script quality","Avatar realism","Voice quality","Caption quality","Overall ad readiness"],"verdict":"worked","score":null,"score_total":null,"note":"Voice output stays consistent and stable across the video.","evidence_state":"verified","source":null,"artifacts":[{"url":"https://cdn.futuresmart.ai/public/aidemos/ada242395b9642fdacde72d4547aafe9.mp4?v=1","role":"output","alt":null}],"run_id":"9fdbb84b-4aa0-484d-8f89-5c46608019a5","study_title":"Generate UGC-Style Video Ads With AI Avatars","study_kind":"generation","research_task":"86baxegpg","tested_at":null,"completeness":"input-and-output","input":{"state":"text","text":"Product URL: https://www.duolingo.com/\n\nExact script:\nHook: Learning a new language has never been this easy.\nScript: I've been using Duolingo for a few minutes every day, and it's made language learning simple and fun. The short lessons are easy to follow, and the daily practice keeps me motivated. If you're planning to learn a new language, give Duolingo a try.\n\nOutput requirements:\n- Vertical (9:16)\n- 20–30 seconds\n- UGC-style AI presenter\n- Natural AI voice\n- Captions enabled","files":[],"modality":"mixed","stresses":["Mobile app understanding","Consumer app promotion","Script quality","Avatar realism","Voice quality","Caption quality","Overall ad readiness"]},"tool_page_slug":"akool","tool_url":"https://aidemos.com/tools/akool","permalink":"https://aidemos.com/evidence/e1c671b1-a7b3-43dc-934e-5e02e99928e0","api_url":"https://ai.aidemos.com/v1/observations/e1c671b1-a7b3-43dc-934e-5e02e99928e0"},"peers":[{"id":"b2ef26b2-2972-4c88-96b0-547d48165f9f","tool":"synthesia","tool_name":"Synthesia","verdict":"worked","score":null,"score_total":null,"note":"The Duolingo voice was reported as clear and well-paced, with no technical issues during generation.","artifact_count":1,"thumbnail":"https://cdn.futuresmart.ai/public/aidemos/ea4c634e3873477ba8e836f199738bcc.mp4?v=1","evidence_url":"https://aidemos.com/evidence/b2ef26b2-2972-4c88-96b0-547d48165f9f"},{"id":"06a249c8-9fd8-43fe-925f-daff45d3329e","tool":"topview-ai","tool_name":"Topview AI","verdict":"worked","score":null,"score_total":null,"note":"The voice stayed consistent and understandable across the video.","artifact_count":2,"thumbnail":"https://cdn.futuresmart.ai/public/aidemos/804557dc8e114b7b881b3057d7014c4f.mp4?v=1","evidence_url":"https://aidemos.com/evidence/06a249c8-9fd8-43fe-925f-daff45d3329e"},{"id":"8218446d-74df-47aa-92fa-b7a69a619ce0","tool":"vidnoz-ai","tool_name":"Vidnoz AI","verdict":"worked","score":null,"score_total":null,"note":"Generates a stable voice performance that remains consistent across the clip and fits the educational-app style prompt.","artifact_count":1,"thumbnail":"https://cdn.futuresmart.ai/public/aidemos/f25b8326c2154e5688b7d75b8d2dc085.mp4?v=1","evidence_url":"https://aidemos.com/evidence/8218446d-74df-47aa-92fa-b7a69a619ce0"}],"other_criteria":[{"id":"762943db-0f98-436c-99f7-ca2389e72d99","criterion":"ad-readiness","criterion_name":"Ad-readiness","rank_role":"decisive","verdict":"struggled","score":null,"score_total":null,"note":"The export succeeds, but the generic background, flat tone, and lack of app UI mean it is not ready to run unchanged as a paid ad.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/762943db-0f98-436c-99f7-ca2389e72d99"},{"id":"67d03d68-a3e0-4842-b3fb-3d74eed26da6","criterion":"avatar-realism","criterion_name":"Avatar realism","rank_role":"decisive","verdict":"mixed","score":null,"score_total":null,"note":"The presenter is serviceable, but the avatar still looks moderately AI-generated rather than high-end realistic.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/67d03d68-a3e0-4842-b3fb-3d74eed26da6"},{"id":"45385946-2f98-44ce-a46a-9bb2f436fc45","criterion":"b-roll-product-integration","criterion_name":"B-roll / product integration","rank_role":"decisive","verdict":"failed","score":null,"score_total":null,"note":"Adds no app UI or other product footage at all.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/45385946-2f98-44ce-a46a-9bb2f436fc45"},{"id":"3c8c0c8a-13ae-40cf-ad1d-841db194a417","criterion":"product-understanding","criterion_name":"Product understanding","rank_role":"decisive","verdict":"struggled","score":null,"score_total":null,"note":"Keeps the language-learning message simple, but the output stays generic and does not make Duolingo feel distinctive.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/3c8c0c8a-13ae-40cf-ad1d-841db194a417"},{"id":"92102361-70c1-4a8d-a50d-e67a18a661a1","criterion":"script-quality-persuasiveness","criterion_name":"Script quality & persuasiveness","rank_role":"decisive","verdict":"mixed","score":null,"score_total":null,"note":"Communicates the app benefits clearly, but the tone is flat and less engaging, so the UGC pitch is only mildly persuasive.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/92102361-70c1-4a8d-a50d-e67a18a661a1"}],"appears_in":[{"page_type":"ranking","slug":"ugc-video-ad-generators","title":"Best AI Tools for Generating UGC-Style Video Ads With AI Avatars","url":"https://aidemos.com/best/ugc-video-ad-generators","binding":"run"}],"same_scenario":[{"id":"b2ef26b2-2972-4c88-96b0-547d48165f9f","tool":"synthesia","tool_name":"Synthesia","verdict":"worked","score":null,"score_total":null,"note":"The Duolingo voice was reported as clear and well-paced, with no technical issues during generation."},{"id":"06a249c8-9fd8-43fe-925f-daff45d3329e","tool":"topview-ai","tool_name":"Topview AI","verdict":"worked","score":null,"score_total":null,"note":"The voice stayed consistent and understandable across the video."},{"id":"8218446d-74df-47aa-92fa-b7a69a619ce0","tool":"vidnoz-ai","tool_name":"Vidnoz AI","verdict":"worked","score":null,"score_total":null,"note":"Generates a stable voice performance that remains consistent across the clip and fits the educational-app style prompt."}]}