# What Is Zero A/B Testing On Its Fasting-App Paywall?

Source: Lazyweb Research
Author: Ali Abouelatta, Lazyweb Research
Published: 2026-07-07
Updated: July 2026
Sample size: n=68
Category: [Named-company experiment teardowns](https://design.lazyweb.com/blog/category/named-company-experiment-teardowns)
Tags: paywall, retention, monetization, experiments, mobile, saas
HTML: https://design.lazyweb.com/blog/zero-fasting-app-paywall-experiments
Markdown: https://design.lazyweb.com/blog/zero-fasting-app-paywall-experiments.md

**Answer.** Lazyweb Research detected 68 distinct experiments at Zero (July 2026), a top-10 company total in the corpus, with a detected paywall footprint of at least 9 and a small signup footprint of at least 2. [1] Zero is one of the highest-volume health/fasting apps tracked, and its detected iteration is spread across surfaces rather than concentrated on the paywall. These are observed before/after variations with inferred rationale, not company-confirmed A/B tests.

> Lazyweb Research detected 68 Zero experiments (July 2026), a top-10 company total across the 276-app corpus.

## The finding

Lazyweb Research detected **68 distinct experiments** at Zero, placing it among the ten most-experimented apps in the corpus. [1] The detected surface mix is diffuse — at least 9 paywall and at least 2 signup experiments — with the remainder spread across unlabeled surfaces. For a fasting/health app, this volume signals a continuous iteration culture rather than a one-off redesign.

## How to apply it

For a fasting app benchmarking its own cadence, Zero's 68-experiment volume is a reference point: it sits alongside Blinkist (70) and Grammarly (67) at the top of the corpus. Use it to argue that sustained, multi-surface iteration — not a single big redesign — is the norm among the most-tracked apps. Because only 2 of Zero's experiments were detected in 2026, treat this as a cumulative-volume signal, not a current-year one. [1]

## Caveats

All figures are observed variations with LLM-inferred rationale, not company-confirmed A/B tests — no lift is measured. [1] Surface splits are lower bounds because screen category is unlabeled on 1,425 of 4,814 corpus experiments. [cat_null]

## The numbers

| Stat | Computed from |
| --- | --- |
| 68 distinct experiments; at least 9 paywall, at least 2 signup | company_total:zero (value 68; paywall 9, signup 2, in-2026 2) |
| 1,425 of 4,814 experiments have no screen category | screen_category_null_on_experiments (1425/4814) |

## Methodology

Universe: 68 distinct Zero experiments (COUNT(DISTINCT experiment_id)) within 4,814 detected before/after UI diffs across 276 companies, July 2026. Extraction: LLM-inferred rationale on observed variations. Caveat: detected variations only, never company-confirmed A/B tests.

## Sources & citations

- [1] Lazyweb Research analysis of 68 detected experiments (Zero, ~800-app mobile corpus), July 2026. COUNT(DISTINCT experiment_id) on before/after diffs; surface splits from is_paywall + screen_category.
- [cat_null] Lazyweb Research analysis of 4,814 detected experiments (276 companies, ~800-app mobile corpus), July 2026. screen_category is NULL on 1,425 experiments, so all surface splits are lower bounds.

## Related questions

- [What Is BetterMe A/B Testing On Signup And Paywall?](https://design.lazyweb.com/blog/betterme-signup-paywall-experiments)
- [Which Apps Run The Most Detected UI Experiments Overall?](https://design.lazyweb.com/blog/which-apps-run-the-most-experiments-overall)
- [What Has ChatGPT Changed On Its Paywall And Signup This Year?](https://design.lazyweb.com/blog/chatgpt-signup-paywall-experiments-2026)
- [What Has Finch Changed On Its App This Year?](https://design.lazyweb.com/blog/finch-daily-goals-experiments-this-year)
- [What Is Snapchat A/B Testing On Its Snapchat+ Paywall?](https://design.lazyweb.com/blog/snapchat-paywall-discount-experiments)
- [What Is YouTube Music A/B Testing On Its Premium Paywall CTA?](https://design.lazyweb.com/blog/youtube-music-paywall-cta-experiments)
- [What Is Audible A/B Testing On Its Premium Plus Paywall?](https://design.lazyweb.com/blog/audible-paywall-trial-cta-experiments)
- [What Is Disney+ A/B Testing On Its Plan Selection Paywall?](https://design.lazyweb.com/blog/disney-plus-plan-naming-experiments)

## Explore the evidence

- [Cal AI app tree](https://design.lazyweb.com/company/cal-ai/app-tree) — Full 45-frame August 2026 capture
- [Cal AI trial introduction](https://design.lazyweb.com/flow/cal-ai/onboarding-paywall) — Three captured screens · August 2026
- [Cal AI: sign-in, trial, then reminder](https://design.lazyweb.com/blog/cal-ai-sign-in-trial-reminder-sequence)
- [Paywall before or after account creation?](https://design.lazyweb.com/blog/do-apps-paywall-before-or-after-account-creation)

## Continue your research

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