# Invoice Maker vs HeatSig

The clearest difference is in-app purchases: HeatSig at none against Invoice Maker's 6. HeatSig also leads on ads (none vs shown) and device support (3 vs 1). On price, update cadence and iOS requirement there is nothing between them.

Both are free to download. Invoice Maker sells 6 in-app purchases, starting at $4.99 per 7 days. HeatSig asks for nothing beyond the download.

Invoice Maker ships an update fortnightly, HeatSig every 3 weeks. The most recent releases landed on October 15, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Invoice Maker | HeatSig |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (17 ratings)](https://appshunter.io/ios/app/invoice-maker-generator-app/id6473728012/reviews)** | — |
| Number of ratings | **17** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 33 MB | 66 MB |
| Requires iOS | 16.4 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [MyApps](https://appshunter.io/developer/1654400413) | [Heatsig Pte. Ltd.](https://appshunter.io/developer/1835618366) |

## What reviewers say

### Invoice Maker

[App page](https://appshunter.io/ios/app/invoice-maker-generator-app/id6473728012)

Create professional invoices, estimates, and receipts quickly. Customize templates with your logo, add taxes, and track payment status. Ideal for freelancers and small businesses needing efficient billing.

**Highlights:** Professional invoice creation, Customizable templates with logo, Automatic tax and total calculations, PDF export and instant sharing, Client and product management, Invoice status tracking, Multiple currency and tax support

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Invoice Maker | $4.99 | per 7 days |
| Invoices | $4.99 | per 7 days |
| Invoice Generator | $9.99 | per month |
| Invoice App | $9.99 | per month |
| Invoice Simple | $39.99 | per year |
| Make Receipt | $39.99 | per year |


### HeatSig

[App page](https://appshunter.io/ios/app/heatsig/id6751530567)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Invoice Maker free?

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

### Is HeatSig free?

HeatSig is free to download, with no in-app purchases.

### Do Invoice Maker or HeatSig have ads?

Invoice Maker shows ads; HeatSig does not.

### Which is updated more often, Invoice Maker or HeatSig?

Invoice Maker ships an update fortnightly, and HeatSig every 3 weeks. Most recently, Invoice Maker was updated on October 15, 2026 and HeatSig on October 12, 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.*