Software Alternatives, Accelerators & Startups

Protocol Deviation VS Larkling

Compare Protocol Deviation VS Larkling and see what are their differences

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Protocol Deviation logo Protocol Deviation

eClinical platform for clinical trials

Larkling logo Larkling

Free co-parenting app built for LGBTQ+ and alternative families. Shared calendar, secure messaging, expense tracking, and more.
  • Protocol Deviation Landing page
    Landing page //
    2022-11-18
  • Larkling
    Image date //
    2026-08-04
  • Larkling
    Image date //
    2026-08-04
  • Larkling
    Image date //
    2026-08-04
  • Larkling
    Image date //
    2026-08-04

Larkling is the free co-parenting app that de-escalates conflict, not just records it. Its AI Tone Coach rewrites hostile messages into calm, child-focused ones before you hit send — catching the tone the paid apps charge $30+/mo for, included free.

Includes a shared custody calendar, secure non-editable messaging, expense tracking, a document vault, and Solo Mode (keeps a reliable record even when your co-parent won't join).

Free forever — no credit card, no per-parent fees. Built for every kind of family: LGBTQ+, blended, single, donor-conceived, and traditional. UK-founded, EU data storage, UK GDPR compliant. Premium is £6.99/month for the WHOLE family (not per parent).

After the free tier collapsed in 2026 (AppClose ended Jan 1, TalkingParents Mar 30), Larkling is the only major co-parenting app still genuinely free.

Larkling

$ Details
freemium £6.99 / Monthly (Premium)
Release Date
2026 June
Startup details
Country
United Kingdom
Employees
1 - 9

Protocol Deviation features and specs

No features have been listed yet.

Larkling features and specs

  • Price
    Free forever · Premium £6.99/mo per family
  • AI tone checker
    Rewrites hostile messages before send — included free
  • Solo mode
    Keeps a reliable record even if your co-parent won't join
  • Messaging
    Secure, non-editable, timestamped
  • Shared Calendar
    Custody schedule + UK school holidays
  • Expense Tracking
    Split shared costs with receipts
  • Document Storage
    Parenting plans & records in one place
  • Family Friendly
    LGBTQ+, blended, single, donor-conceived, traditional
  • Data Security
    UK-founded · EU servers · UK GDPR compliant
  • Platforms
    Web (PWA) — works in any browser

Analysis of Protocol Deviation

Overall verdict

  • Protocol Deviation appears to be a niche resource focused on clinical trial and research compliance topics, which can be valuable for those in the industry, though independent verification of its authority, accuracy, and update frequency is recommended before relying on it for critical decisions.

Why this product is good

  • Focuses on a specialized topic (protocol deviations in clinical research) that is often underserved by general resources
  • May offer practical guidance for handling deviations, documentation, and regulatory compliance
  • Can serve as a convenient reference point for clinical research professionals seeking quick information

Recommended for

  • Clinical research coordinators and associates managing trial compliance
  • Regulatory affairs and quality assurance professionals in life sciences
  • Sponsors, CROs, and site staff needing guidance on documenting and reporting protocol deviations
  • Students or newcomers learning about Good Clinical Practice (GCP) and trial management

Protocol Deviation videos

Protocol Deviations

More videos:

  • Review - What Is A Protocol Deviation?
  • Review - The Differences Between Protocol Deviations and Violations In Clinical Research Both Minor and Major

Larkling videos

No Larkling videos yet. You could help us improve this page by suggesting one.

Add video

Category Popularity

0-100% (relative to Protocol Deviation and Larkling)
Clinical Trial Management System
Family Organizer
0 0%
100% 100
Compliance
100 100%
0% 0
Communication
0 0%
100% 100

Questions & Answers

As answered by people managing Protocol Deviation and Larkling.

What makes your product unique?

Larkling's answer:

Larkling is the only co-parenting app built from day one for ALL family structures — LGBTQ+ families, blended families, single parents by choice, and traditional families alike. Key differentiators: custom pronouns and flexible roles, Solo Mode that works even when the other parent refuses to join, AI Tone Coach that helps de-escalate hostile messages before they're sent, court-ready PDF Export Packs, and a genuinely free forever core with no trial bait.

Why should a person choose your product over its competitors?

Larkling's answer:

It's the only major co-parenting app that's genuinely free forever — no credit card, no trial, no hardship waiver to apply for. Most rivals went paid in 2026 (AppClose ended free Jan 1, TalkingParents Mar 30) or sit behind per-parent fees that double for two parents. Larkling includes an AI Tone Coach that rewrites hostile messages before you send (a feature rivals charge $30+/mo for), plus Solo Mode that keeps a reliable record even when your co-parent won't join — and it's built for every kind of family, not just the traditional divorced couple.

How would you describe the primary audience of your product?

Larkling's answer:

Separated and divorcing co-parents — especially LGBTQ+, blended, single, donor-conceived and other family types that mainstream apps don't serve well. Also budget-conscious parents who need a reliable record of communication, schedules and expenses without paying per-parent subscription fees. Based in the UK and Europe, with a growing US user base.

What's the story behind your product?

Larkling's answer:

Founded by Nye Hoppie after personally hitting the "pay to send a message to your ex" wall — finding that every reliable co-parenting tool locked basic communication behind a subscription, and that most assumed a traditional heterosexual divorced couple. Larkling was built to be genuinely free, warm, and inclusive of all families, with AI that de-escalates conflict rather than just recording it.

Which are the primary technologies used for building your product?

Larkling's answer:

A progressive web app (PWA) that works in any browser. Backend on Supabase (PostgreSQL) with EU data storage in London (eu-west-2) for UK GDPR compliance. Served via Cloudflare Workers and Pages. AI Tone Coach built on LLM-based message rewriting. No native app required — installable on iOS and Android home screens.

Who are some of the biggest customers of your product?

Larkling's answer:

Individual co-parenting families across the UK, Europe and US LGBTQ+ and blended families who need inclusive co-parenting tools Single co-parents using Solo Mode to keep a record when the other parent won't engage Family-law mediators and solicitors who recommend a reliable, low-cost record-keeping option Community and support organisations signposting free tools to separating parents

User comments

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What are some alternatives?

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