{"observation":{"id":"67d03d68-a3e0-4842-b3fb-3d74eed26da6","tool":"akool","tool_name":"AKOOL","criterion":"avatar-realism","criterion_name":"Avatar realism","criterion_definition":"Believable presenter; accurate lip-sync; how uncanny or AI-obvious the presenter looks.","criterion_evidence_type":"transformation","criterion_rank_role":"decisive","criterion_rank_role_reason":"If the presenter looks fake or lip-sync is off, the ad fails at the core UGC avatar job. (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":"mixed","score":null,"score_total":null,"note":"The presenter is serviceable, but the avatar still looks moderately AI-generated rather than high-end realistic.","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/67d03d68-a3e0-4842-b3fb-3d74eed26da6","api_url":"https://ai.aidemos.com/v1/observations/67d03d68-a3e0-4842-b3fb-3d74eed26da6"},"peers":[{"id":"63626937-61a4-48f4-96d2-3e6b79f8a8ba","tool":"dreamface","tool_name":"DreamFace","verdict":"mixed","score":null,"score_total":null,"note":"The Duolingo avatar has good facial realism and natural gestures/weight shifting, but the right hand turns into a smooth mitten-like blob around 0:11.","artifact_count":2,"thumbnail":"https://cdn.futuresmart.ai/public/aidemos/326fff910d734e64af5d6b2b3c668b24.mp4?v=1","evidence_url":"https://aidemos.com/evidence/63626937-61a4-48f4-96d2-3e6b79f8a8ba"},{"id":"9012a876-7dac-4276-89c3-aa9dc9ebcf9d","tool":"heygen","tool_name":"HeyGen","verdict":"worked","score":null,"score_total":null,"note":"The Duolingo output reads as a casual creator-style presenter rather than an AI-obvious stock avatar, with the report calling the setting genuinely UGC-authentic.","artifact_count":2,"thumbnail":"https://cdn.futuresmart.ai/public/aidemos/e1595503067242cdbfafa0a9676f1a5a.mp4?v=1","evidence_url":"https://aidemos.com/evidence/9012a876-7dac-4276-89c3-aa9dc9ebcf9d"},{"id":"7161f9f6-898f-46f1-907c-50a97ff79b05","tool":"invideo-ai","tool_name":"Invideo AI","verdict":"worked","score":null,"score_total":null,"note":"The presenter reads as a consistent human avatar with a clean UGC look throughout the clip, with no obvious flicker or identity break reported.","artifact_count":2,"thumbnail":"https://cdn.futuresmart.ai/public/aidemos/2d708f66a6554c76aa83c81aa49797c7.mp4?v=1","evidence_url":"https://aidemos.com/evidence/7161f9f6-898f-46f1-907c-50a97ff79b05"},{"id":"b5bf84f3-e76a-41ce-a229-dbd3528280ed","tool":"joggai","tool_name":"JoggAI","verdict":"worked","score":null,"score_total":null,"note":"Generates a strong-looking photorealistic avatar with no visible artifacts; the report says the face, hair, and teeth look natural even in a wide smile.","artifact_count":2,"thumbnail":"https://cdn.futuresmart.ai/public/aidemos/abcbc5e48bb14dc99f8490b2808cf261.mp4?v=1","evidence_url":"https://aidemos.com/evidence/b5bf84f3-e76a-41ce-a229-dbd3528280ed"},{"id":"a822e15b-a091-4f92-8344-d0bf07c19660","tool":"synthesia","tool_name":"Synthesia","verdict":"worked","score":null,"score_total":null,"note":"The Duolingo output used a smooth, centered talking-head avatar, and the report says lip-sync accuracy was maintained.","artifact_count":1,"thumbnail":"https://cdn.futuresmart.ai/public/aidemos/ea4c634e3873477ba8e836f199738bcc.mp4?v=1","evidence_url":"https://aidemos.com/evidence/a822e15b-a091-4f92-8344-d0bf07c19660"},{"id":"6a41cd91-74b9-464b-9b3f-6fdefbfccc7b","tool":"topview-ai","tool_name":"Topview AI","verdict":"mixed","score":null,"score_total":null,"note":"The avatar remains visible and moves slightly, but the report describes the presenter as more AI-like than premium tools.","artifact_count":2,"thumbnail":"https://cdn.futuresmart.ai/public/aidemos/804557dc8e114b7b881b3057d7014c4f.mp4?v=1","evidence_url":"https://aidemos.com/evidence/6a41cd91-74b9-464b-9b3f-6fdefbfccc7b"},{"id":"489c4461-ad1d-491e-a950-62376aaf9b59","tool":"vidnoz-ai","tool_name":"Vidnoz AI","verdict":"mixed","score":null,"score_total":null,"note":"Produces a believable talking-head presenter, but the report still describes the avatar as moderately AI-generated compared with higher-end tools.","artifact_count":1,"thumbnail":"https://cdn.futuresmart.ai/public/aidemos/f25b8326c2154e5688b7d75b8d2dc085.mp4?v=1","evidence_url":"https://aidemos.com/evidence/489c4461-ad1d-491e-a950-62376aaf9b59"}],"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":"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"},{"id":"e1c671b1-a7b3-43dc-934e-5e02e99928e0","criterion":"voice-quality","criterion_name":"Voice quality","rank_role":"decisive","verdict":"worked","score":null,"score_total":null,"note":"Voice output stays consistent and stable across the video.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/e1c671b1-a7b3-43dc-934e-5e02e99928e0"}],"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":"63626937-61a4-48f4-96d2-3e6b79f8a8ba","tool":"dreamface","tool_name":"DreamFace","verdict":"mixed","score":null,"score_total":null,"note":"The Duolingo avatar has good facial realism and natural gestures/weight shifting, but the right hand turns into a smooth mitten-like blob around 0:11."},{"id":"9012a876-7dac-4276-89c3-aa9dc9ebcf9d","tool":"heygen","tool_name":"HeyGen","verdict":"worked","score":null,"score_total":null,"note":"The Duolingo output reads as a casual creator-style presenter rather than an AI-obvious stock avatar, with the report calling the setting genuinely UGC-authentic."},{"id":"7161f9f6-898f-46f1-907c-50a97ff79b05","tool":"invideo-ai","tool_name":"Invideo AI","verdict":"worked","score":null,"score_total":null,"note":"The presenter reads as a consistent human avatar with a clean UGC look throughout the clip, with no obvious flicker or identity break reported."},{"id":"b5bf84f3-e76a-41ce-a229-dbd3528280ed","tool":"joggai","tool_name":"JoggAI","verdict":"worked","score":null,"score_total":null,"note":"Generates a strong-looking photorealistic avatar with no visible artifacts; the report says the face, hair, and teeth look natural even in a wide smile."},{"id":"a822e15b-a091-4f92-8344-d0bf07c19660","tool":"synthesia","tool_name":"Synthesia","verdict":"worked","score":null,"score_total":null,"note":"The Duolingo output used a smooth, centered talking-head avatar, and the report says lip-sync accuracy was maintained."},{"id":"6a41cd91-74b9-464b-9b3f-6fdefbfccc7b","tool":"topview-ai","tool_name":"Topview AI","verdict":"mixed","score":null,"score_total":null,"note":"The avatar remains visible and moves slightly, but the report describes the presenter as more AI-like than premium tools."},{"id":"489c4461-ad1d-491e-a950-62376aaf9b59","tool":"vidnoz-ai","tool_name":"Vidnoz AI","verdict":"mixed","score":null,"score_total":null,"note":"Produces a believable talking-head presenter, but the report still describes the avatar as moderately AI-generated compared with higher-end tools."}]}