comparisons

Published by Floriva · Updated 2026-05-01 · How Floriva checks its guides

Floriva vs Glow: On-Device Privacy vs Cloud Fertility Tracking

Floriva vs Glow compared on privacy, data storage, and features. Glow is cloud-based, settled with the California AG in 2020 for $250K over a data vulnerability, and had a separate API bug in 2024 that exposed data of about 25 million users. Floriva keeps core records local-first.

Glow is a fertility and period tracker with community features and partner sharing. It is also cloud-based, requires an account, and has a documented history of security problems: a 2020 California AG settlement for $250K over a data vulnerability, and a 2024 API bug that exposed data of about 25 million users. Floriva keeps core records on your device and does not require an account for core tracking. If fertility features and community matter, Glow offers more. If privacy architecture matters, they are in different categories.

Glow is built for people actively trying to conceive. It has partner sharing, community forums, and detailed fertility metrics. It is also a cloud-based app that stores your health data on company servers. Those servers have had two documented security incidents: a 2016 vulnerability found by Consumer Reports that led to a $250,000 California AG settlement in 2020, and a separate 2024 API bug that exposed data of about 25 million users.

Floriva is built for people who want core cycle records to stay local-first. No account is required for core tracking, and Floriva has no readable central cycle database. Less fertility-specific depth, more privacy by design.

The Core Difference

Glow is a cloud app. Your cycle data, fertility markers, symptoms, and partner-shared information live on Glow's servers. You need an account. The company has access to your data.

Floriva is a local-first app. Core records live on your phone. No account is required for core tracking. Optional sync is encrypted so the company cannot read synced records.

This is not a policy difference. It is an architecture difference. Glow could change its privacy policy tomorrow and your data would still be on their servers. Floriva cannot read core local records or end-to-end encrypted sync data.

Data Architecture

Glow requires an email account to start tracking. Your data syncs to Glow's cloud infrastructure. Partner sharing means a second account also has access to your data through Glow's servers. Community features mean your posts and interactions are stored alongside your health data.

In 2016, Consumer Reports found that Glow's Partner Connect feature could share a user's data without their consent. Glow stated it fixed the issue. The California AG settled with Glow in September 2020 for $250,000 over this vulnerability. In October 2024, a security researcher found a separate API bug that exposed personal data of about 25 million Glow users. Both incidents show the risk in cloud-based health apps: when a company stores your data, their security failures are your data exposure.

Floriva stores core records in your device's local storage. No account is required for core tracking. Optional cross-device sync uses end-to-end encryption, so Floriva cannot read synced cycle records.

A zero-knowledge period tracker means the company does not know what you are tracking. Floriva fits that definition. Glow does not.

Features

Glow has real advantages for fertility-focused users. Partner accounts let couples track together. Community forums provide peer support. Detailed fertility metrics go beyond basic period tracking into ovulation prediction, intercourse logging, and pregnancy probability estimates.

Floriva tracks cycles, symptoms, and patterns without the fertility-community layer. It is a tracking tool, not a social platform. There is no partner sharing, no community, no forums.

If you are actively trying to conceive and value community support, Glow offers features Floriva does not. If you want your data to stay private, Floriva offers guarantees Glow cannot make.

Pricing

Glow: Free tier with basic tracking. Premium subscription for advanced features. The free tier relies on the broader Glow business model, which treats data about its user base as a business asset.

Floriva: Paid subscription, no free tier. The subscription is the entire business model. Floriva does not rely on data-related revenue from readable cycle records.

Who Should Choose Floriva vs Glow

Choose Glow if: you are actively trying to conceive, you want partner sharing and community features, and you are comfortable with cloud-based storage. Glow delivers fertility-specific features that on-device trackers do not match.

Choose Floriva if: you want your cycle data to stay on your device. If Glow's documented security incidents concern you, if subpoena risk matters, or if you do not want a company holding your reproductive health data, Floriva's architecture removes those concerns. See the full best private period tracker apps list for other on-device options.

The Privacy Bottom Line

Glow's security record shows what happens when cloud-based health apps have vulnerabilities: your most sensitive data is exposed. Glow has addressed specific issues over the years, but the underlying reality has not changed. Your data is on their servers. Their security problems are your problem.

Floriva has no readable central cycle database to expose in a server-side breach. The privacy guarantee is built into the architecture, not dependent on the quality of the company's security team.