---
title: Moon AI vs ChatGPT and other AI for PMS · Niyora
description: General AI like ChatGPT starts from scratch and doesn’t know your cycle. Moon, Niyora’s AI, is built for the hard PMS moment. What each does.
url: https://niyora.com/compare/moon-ai-vs-other-ai/
---

[All comparisons](https://niyora.com/compare/)

# Moon vs other AI: which helps with PMS and PMDD?

General AI like ChatGPT can talk anything through. Moon knows your cycle and your past moments, and is built for the hard PMS moment.

Coming soon on

Android

Checked on 13 October 2026 against ChatGPT’s own site and App Store listing.

## The short answer

- 01 General AI assistants, such as ChatGPT, answer anything you ask. They don’t know your cycle unless you explain it each time.
- 02 Moon is the AI inside Niyora, a PMS and PMDD support app. It knows where you are in your cycle and helps you calm down, see it another way and decide what to say.
- 03 Moon gets your words with names and places removed on your phone, and your text isn’t used to train the AI.

Feature by feature

## How Moon and ChatGPT compare

Every ChatGPT entry is what OpenAI says on its own site, help pages or App Store listing. Where it says nothing, the table says so.

| Feature | Moon in Niyora | ChatGPT |
| --- | --- | --- |
| What it is | A PMS and PMDD support app for the hard moment, with a cycle calendar. | A general-purpose AI assistant from OpenAI. ChatGPT is the example here. |
| Built for | The days before your period, when a feeling hits and you have to decide what to do next. | Any question or task, from writing to research. |
| Help in the hard moment When it’s happening, not after | Built for it Tell Moon what happened. Swipe through other ways to see it, each with its source, calming activities and facts about your body, then decide what to say, with drafts. | In part It can talk a moment through if you explain it. It doesn’t know your cycle or what happened last month unless you tell it. |
| PMS and PMDD | A predicted PMS window, a library of common PMS and PMDD scenarios, your saved moments mapped by cycle day, and a cycle report PDF for a doctor or therapist. | None built in. |
| Cycle prediction | Predicts your period and PMS window from your own logged cycles or your Apple Health period history. | None. |
| AI | Moon runs on a leading AI model under enterprise terms. Names and places are replaced on your phone first, and your text isn’t used to train the models. | OpenAI’s models. A setting called Improve the model for everyone controls whether your conversations train OpenAI’s models. |
| Account | None. No sign-up, email or password. | Optional for basic use. Signing in keeps your history across devices. |
| Your data | Entries are encrypted on your phone. Its App Store label lists no data used to track you and none linked to you. | Conversations are kept in your ChatGPT history. Its App Store label lists health, contact info and user content as linked to you. |
| Price | Free to start. Premium is $8.99 a month or $29.99 a year. Lifetime is $79.99 until 30 November 2026. | Free, with paid plans. The US App Store lists ChatGPT Go at $8.00, Plus at $19.99 and Pro from $100. |
| Free version | Moon moments each month, the cycle calendar and PMS window, and calming activities. | Free to use. Paid plans add more use and more features. |
| Platforms | iPhone today. Android coming soon. | iPhone, Android and the web. |

Sources for ChatGPT, checked 13 October 2026: ChatGPT’s App Store listing (US) ; OpenAI’s help center, Data controls in ChatGPT . Sources for Niyora: its [privacy policy](https://niyora.com/privacy/) and [App Store listing](https://apps.apple.com/app/niyora-pms-emotions/id6764561688).

Who each is for

## Who Moon and ChatGPT are for

Moon is for you if

You want help that already knows it’s day 26 and what happened last month, and that ends with something you can do.

ChatGPT is for you if

You want one assistant for everything, and you’re happy to explain your cycle and your situation each time.

The difference

## What Moon does that ChatGPT doesn’t

Measured against what ChatGPT describes on its own pages on 13 October 2026.

- ### It knows your cycle Moon knows where you are in your cycle and when your PMS window is, so you don’t have to explain it.
- ### It remembers your moments Moon can point out when the same thought has come round on the same days before, from moments saved on your phone.
- ### Every idea shows its source Each perspective names where it comes from, such as CBT, Stoic philosophy or self-compassion research.
- ### Names removed before it sees them Names and places are replaced on your phone before your text reaches the AI, and your text isn’t used to train it.

Pricing

## What Moon and ChatGPT cost

Niyora

Free to start

Monthly $8.99 Yearly $29.99 Lifetime $79.99 until 30 November 2026

Free: Moon moments each month, the cycle calendar and PMS window, and calming activities.

ChatGPT

Free, with paid plans. The US App Store lists ChatGPT Go at $8.00, Plus at $19.99 and Pro from $100.

Free version: Free to use. Paid plans add more use and more features.

Source: US App Store, read 13 October 2026. Prices can differ by country and change with offers.

Niyora prices are in US dollars on the US App Store. Premium adds unlimited Moon moments, your patterns, the cycle report and asking Moon about your past moments.

Privacy

## What happens to what you log

What each app declares in its App Store privacy label and its own policy. Each line is the company’s own declaration.

Niyora

Account None. No email, password or sign-in. Where entries live Encrypted on your phone, with a key that never leaves it. Before the AI sees it Names and places are replaced on your phone. Your text isn’t used to train the AI. Used to track you (App Store label) None declared Linked to your identity None declared Collected, not linked to you Health, Purchase History, Photos or Videos, Other User Content, Device ID

ChatGPT

Account Optional for basic use. Signing in keeps your history across devices. Used to track you (App Store label) None declared Linked to your identity Health & Fitness, Contact Info, User Content, Identifiers, Usage Data, Location, Search History, Diagnostics

App Store label read 13 October 2026.

[What nine cycle apps declare about your data](https://niyora.com/compare/privacy/)

FAQ

## Questions about Moon and ChatGPT

Can I use ChatGPT for PMS?

+

You can. ChatGPT can talk a hard moment through, but it doesn’t know your cycle or what happened last month unless you tell it each time. Moon, the AI in Niyora, knows where you are in your cycle and your past moments, and every idea it offers names its source.

Does ChatGPT train on what I write?

+

OpenAI’s help center describes a setting called Improve the model for everyone that controls whether your ChatGPT conversations are used to train its models. Niyora’s text goes to its AI under enterprise terms that bar training on it, after names and places are removed on your phone.

Is what I tell Moon used to train AI?

+

No. Moon runs on a leading AI model under enterprise terms. Your text isn’t used to train the models and isn’t routinely read by a person. Names and places are replaced on your phone first, and your history stays encrypted on your phone.

How much does Moon cost compared with ChatGPT?

+

Moon comes with Niyora, which is free to start with Moon moments each month. Premium, at $8.99 a month or $29.99 a year, gives unlimited moments. ChatGPT is free, with paid plans listed on the US App Store from $8.00 for Go and $19.99 for Plus.

## How this page was checked

Checked on 13 October 2026. Every ChatGPT fact above comes from these pages, read on that date. We name them here and don’t link to them.

- ChatGPT’s App Store listing (US)
- OpenAI’s help center, Data controls in ChatGPT

Spotted something out of date? [neha@niyora.com](mailto:neha@niyora.com?subject=Correction%3A%20Moon%20vs%20other%20AI)

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