12testers – $8 Google Play Testers vs NovaSynth by Noveum: Which Is Better in 2026?

$8, paid once per app. That is the whole price of a 12testers run, and there is no subscription or add-on behind it.

For that $8 you get, as listed on the pricing page: 14 real physical Android devices and Google accounts; 16 continuous days of active testing, which is two days past the 14-day minimum; opt-in and tester continuity monitoring; a simple opt-in through a Google Group or your closed track link; a closeout summary for your production-access preparation; no Play Console password or credentials required; and a free re-test or refund for eligible service-side failures.

Setup is short. Add testers@12testers.pro to the Testers tab of your closed testing track, or share your web opt-in link. The devices usually join within 12 to 24 hours once the release and opt-in route are verified, and you can watch the opted-in count in your own Play Console. If fewer than 12 testers stay opted in for 14 days, the test is re-run free or the $8 is refunded.

Google reviews your app and makes the production-access decision. 12testers is independent from Google LLC and never sells approval.

What problem it solves

Personal Google Play developer accounts created after November 13, 2023 may need at least 12 testers continuously opted in for 14 days before applying for production access. Solo developers often can't find twelve people who will opt in with the right Google account and stay for two weeks. 12testers fills that requirement for a one-time $8 per app, without asking for any Play Console credentials.

NovaSynth by Noveum is a self-service platform for automated voice AI testing. It is designed for developers and teams building voice agents who need repeatable ways to exercise conversations before and after changes. Instead of relying only on a person to place each test call, teams can configure synthetic callers, define scenarios and run batches of calls.

A test starts with the caller and the conversation goal. The persona editor supports settings such as tone, speaking speed, interruptions and background noise. These controls let a team represent different calling situations while keeping the intended scenario explicit. A developer can use this configuration to examine how a voice agent behaves when callers speak or interact differently.

NovaSynth supports test calls over phone or LiveKit. After a run, teams can inspect call recordings, transcripts and evaluations. Recordings provide the audible conversation, while transcripts make it easier to inspect the exchange in text. Evaluations help a team review the resulting conversations against its testing needs. The purpose is to make investigation and repeat testing part of the voice agent development workflow.

Batch calls help a team execute several configured tests without manually conducting every conversation. Reusing scenarios after a prompt or application change supports regression checks. Teams can compare observed behavior and investigate calls that need closer attention. NovaSynth is a testing tool for the agent being developed; it does not replace the need to define appropriate scenarios or review the results.

NovaSynth is part of the Noveum platform. Noveum provides a monthly free credit allowance shared across its features, with paid plans available. Voice testing consumes credits, and evaluations can add usage costs. The free allowance is not unlimited voice calling. The official product and pricing pages provide current plan details and the entry points for getting started. The platform is available through the Noveum web application.

What problem it solves

Manual voice agent test calls are difficult to repeat consistently across caller personas and scenarios after application changes. NovaSynth automates batches and supplies recordings, transcripts and evaluations for investigation and regression checks.