# Math Helper AI Solver Math.OK vs Invoice Maker

The clearest difference is update cadence: Invoice Maker at every 2 days against Math Helper AI Solver Math.OK's monthly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Math Helper AI Solver Math.OK sells 2 in-app purchases, starting at $7.99 per 7 days and Invoice Maker sells 4 in-app purchases, starting at $8.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Math Helper AI Solver Math.OK ships an update monthly, Invoice Maker every 2 days. The most recent releases landed on September 29, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Math Helper AI Solver Math.OK | Invoice Maker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Monthly | **Every 2 days** |
| Size | 28 MB | 63 MB |
| Requires iOS | 16 | 16 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Saige Pfeffer](https://appshunter.io/developer/1831219275) | [Lora Blankenship](https://appshunter.io/developer/1849738693) |

## What reviewers say

### Math Helper AI Solver Math.OK

[App page](https://appshunter.io/ios/app/math-helper-ai-solver-mathok/id6749571162)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MathSolver Weekly | $7.99 | per 7 days |
| Math Helper AI Solver Math.OK | $8.99 | per 7 days |


### Invoice Maker

[App page](https://appshunter.io/ios/app/invoice-maker-quick-receipts/id6754711515)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| invoiceMakerWeekly | $8.99 | per 7 days |
| Invoice Maker: Quick Receipts | $8.99 | per 7 days |
| invoiceMakerMonthly | $14.99 | per month |
| invoiceMakerMonthlyTrial | $15.99 | per month |


## Frequently asked questions

### Is Math Helper AI Solver Math.OK free?

Math Helper AI Solver Math.OK is free to download, with in-app purchases available.

### Is Invoice Maker free?

Invoice Maker is free to download, with in-app purchases available.

### Do Math Helper AI Solver Math.OK or Invoice Maker have ads?

Both Math Helper AI Solver Math.OK and Invoice Maker show ads.

### Which is updated more often, Math Helper AI Solver Math.OK or Invoice Maker?

Math Helper AI Solver Math.OK ships an update monthly, and Invoice Maker every 2 days. Most recently, Math Helper AI Solver Math.OK was updated on September 29, 2026 and Invoice Maker on October 11, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*