# HALO App Credit Calculator

This guide will help you estimate the number of credits required for your upcoming event to ensure your AI Effects run smoothly without interruption. 

You can purchase additional credits at any time from your [dashboard](https://www.simplebooth.com/billing/virtual-booth-credits).

***

#### Credit Usage Rules

Account credits power advanced AI Effects within the HALO app.

* **Live Sessions Only**: Credits are only consumed when an AI effect is actively run during a live session.
* **Free Testing**: Testing and refining your AI effect prompts in the dashboard does not use credits.
* **Background Replacement**: In the HALO app, background replacement is included and does not cost credits.
* **Safety Buffer**: If your balance reaches zero, all credit-based features will stop working immediately.

***

#### AI Model Costs

The credit cost per photo generation depends on the AI model you choose for your transformation:

<table><thead><tr><th width="453.41015625">Model</th><th>Credits Per Generation</th></tr></thead><tbody><tr><td><strong>Nano Banana</strong> <br>Best for fastest results; individual participants</td><td>1x</td></tr><tr><td><strong>Nano Banana 2</strong> <br>Best for balance of speed/quality; groups up to 5</td><td>2x</td></tr><tr><td><strong>Nano Banana Pro</strong> <br>Best for best quality; groups up to 5</td><td>3x</td></tr></tbody></table>

**Regeneration Costs**

HALO allows you to enable Guest Regenerations, which lets participants try again if they aren't satisfied with the first result.

To keep your usage predictable, you can set a specific limit on the number of regenerations allowed per session. Each regeneration attempt costs the same amount of credits as the initial generation.

***

#### Example Calculations

| Example 1: High Volume / Fast                 | Example 2: Premium Experience                 |
| --------------------------------------------- | --------------------------------------------- |
| **Model**: Nano Banana (1 Credit)             | **Model**: Nano Banana Pro (3 Credits)        |
| **Regeneration Limit**: 1 per session         | **Regeneration Limit**: 2 per session         |
| **Max Potential Cost**: 2 credits per session | **Max Potential Cost**: 9 credits per session |
| **Estimated Sessions**: 200                   | **Estimated Sessions**: 100                   |
| **Total Credits Needed**: 400                 | **Total Credits Needed**: 900                 |

To calculate the total credits needed for your event, use the following formula:

$$
\[Estimated Total Sessions] × \[Max Credits Per Session] = Total Credits Needed
$$

***

#### Monitoring & Topping Up

You can [purchase more credits](https://www.simplebooth.com/billing/virtual-booth-credits) at any time from your account dashboard.

* **Pricing:** Credits cost **$0.10 each** and are sold in increments of 100 to 10,000.
* **No Expiration:** Any credits you purchase will remain in your account until they are used; they do not expire.
* **Low Credit Alerts:** You will receive email notifications when your balance is running low or if it hits zero. If you run out of credits mid-event, these features will stop working until more are added.


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