Talking Tom Style Voice App

I want to create a light-hearted mobile app that works on both iOS and Android and feels similar to the classic Talking Tom experience. The main attraction is voice interaction: when a user speaks, a fun on-screen character should immediately listen, modify the pitch, and play the line back while lip-syncing.

Scope and expectations
• Cross-platform build delivered as two store-ready packages (App Store and Google Play).
• One animated character asset is enough for this first release; I am fine with a placeholder as long as the animation and mouth movement sync convincingly with the audio.
• Real-time voice capture, processing, and playback with a cartoon-style pitch shift.
• Basic UI: record button, replay, and a simple share option for the recorded clip.

I am open to your preferred tech stack—Unity, Flutter, native, or another proven framework—as long as performance is smooth on typical mid-range devices. Please outline any third-party SDKs, asset store items, or plugins you plan to use so I can approve licensing early.

Success criteria
• Both builds install without crashes on current iOS and Android releases.
• Voice interaction has no noticeable lag, and the pitch-shift effect is clear and playful.
• Character animation aligns well enough that users perceive it as talking back.

If you have shipped similar voice-driven or character apps, include links or short videos. Looking forward to bringing this little entertainer to life together.