# Which Apps Have Run The Most UI Experiments In 2026?

Source: Lazyweb Research
Published: 2026-07-07
Sample size: n=4814
Tags: experiments, mobile, saas, ux-patterns, monetization
HTML: https://www.lazyweb.com/research/which-apps-iterated-most-in-2026-experiments
Markdown: https://www.lazyweb.com/research/which-apps-iterated-most-in-2026-experiments.md

**Answer.** Of 4,814 detected experiments (July 2026), 635 were detected in calendar 2026 — just 13% of the corpus. [1] Finch leads with 30 experiments (all in 2026), followed by ChatGPT (12) and Babbel (8); most companies had single-digit 2026 activity. [2] These are observed variations, not confirmed A/B tests.

> Only 635 of 4,814 detected experiments (13%) landed in 2026; Finch alone accounts for 30 of them (July 2026).

## The finding

Of the **4,814 detected experiments**, only **635 were detected in calendar 2026** — about 13% of the corpus. [1] That means the vast majority of detected activity (4,179 experiments) predates 2026, and "what did company X change this year" is only honestly answerable for a handful of apps. [1] Finch dominates the current year with 30 experiments, all in 2026. [2]

## The 2026 leaderboard

The current-year leaders are few; below them, 2026 counts drop into low single digits.

| Company | Experiments detected in 2026 |
|---|---|
| Finch | 30 (all detected in 2026) [2] |
| ChatGPT | 12 [2] |
| Babbel | 8 [2] |
| AllTrails | 4 [2] |
| Bluesky | 4 [2] |
| Gauthmath | 4 [2] |
| Breathwrk | 4 [2] |
| FaceApp | 4 [2] |

## How to apply it

When a stakeholder asks "who is actively iterating right now," this is the honest shortlist: Finch and ChatGPT are the only two companies with a defensible double-digit 2026 volume. [2] For everyone else, frame findings as "most recent detected changes" with explicit dates rather than a current-year claim, because 87% of the corpus predates 2026. [1] This is the single most important guardrail for any "this year" page in the family. All figures are detected variations. [1]

## Caveats

All figures are observed variations with LLM-inferred rationale, not company-confirmed A/B tests — no lift is measured. [1] Detection date reflects when Lazyweb captured the diff, not necessarily when the company shipped it. [1] Companies with fewer than 8 experiments in 2026 cannot support a standalone current-year page. [2]

## The numbers

| Stat | Computed from |
| --- | --- |
| 635 of 4,814 experiments in 2026 (13%); 4,179 predate 2026 | experiments_2026 (635/4814); total_detected_experiments (4814) |
| 2026 leaders: Finch 30, ChatGPT 12, Babbel 8, AllTrails 4, Bluesky 4, Gauthmath 4, Breathwrk 4, FaceApp 4 | company_total in-2026 splits: finch 30, chatgpt 12, babbel 8, alltrails 4, bluesky 4, gauthmath 4, breathwrk 4, faceapp 4 |

## Methodology

Universe: 4,814 detected experiments across 276 companies, July 2026; 635 in calendar 2026. Extraction: COUNT DISTINCT experiment_id by year. Caveat: detection date is capture date, not ship date; detected variations only.

## Sources & citations

- [1] Lazyweb Research analysis of 4,814 detected experiments (276 companies, ~800-app mobile corpus), July 2026. 635 experiments have experiment_created_at >= 2026-01-01.
- [2] Lazyweb Research analysis of 4,814 detected experiments (276 companies), July 2026. Per-company in-2026 counts (COUNT DISTINCT experiment_id, experiment_created_at >= 2026-01-01).

## Related questions

- [What Has Finch Changed On Its App This Year?](https://www.lazyweb.com/research/finch-daily-goals-experiments-this-year)
- [What Has ChatGPT Changed On Its Paywall And Signup This Year?](https://www.lazyweb.com/research/chatgpt-signup-paywall-experiments-2026)
- [Which Apps Run The Most Paywall CTA Experiments?](https://www.lazyweb.com/research/which-apps-run-the-most-paywall-cta-experiments)