# Invoice Maker vs When to Post AI

The clearest difference is ads: When to Post AI at none against Invoice Maker's shown. When to Post AI also leads on update cadence (daily vs every 3 days). On price, rating, ratings volume and in-app purchases there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.9 for Invoice Maker against 4.8 for When to Post AI. Both are backed by a comparable volume of ratings — 7 and 6 respectively.

Invoice Maker ships an update every 3 days, When to Post AI daily. The most recent releases landed on October 1, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Invoice Maker | When to Post AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (7 ratings)](https://appshunter.io/ios/app/invoice-maker-bill-generator/id6746938705/reviews)** | [4.8 (6 ratings)](https://appshunter.io/ios/app/when-to-post-ai-insta/id6762572607/reviews) |
| Number of ratings | **7** | 6 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 days | **Daily** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 31 MB | 21 MB |
| Requires iOS | **16.0** | 17.1 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [John Paley](https://appshunter.io/developer/1819048337) | [Jack Solomon](https://appshunter.io/developer/586848650) |

## What reviewers say

### Invoice Maker

[App page](https://appshunter.io/ios/app/invoice-maker-bill-generator/id6746938705)

Create professional invoices and estimates quickly with customizable templates. Manage clients and projects, track payments, and gain business insights with smart reports. Enhance your brand with custom logos and colors.

**Highlights:** Professional invoice and estimate creation, Client and project management, Customizable templates with branding, Flexible payment options, Smart revenue and expense reports, Unlimited invoices and estimates

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| accessWeeklySubscription | $8.99 | per 7 days |
| Invoice Maker: Bill Generator. | $8.99 | per 7 days |
| accessMonthlySubscription | $14.99 | per month |
| accessMonthlyTrialSubscription | $15.99 | per month |


### When to Post AI

[App page](https://appshunter.io/ios/app/when-to-post-ai-insta/id6762572607)

This app helps Instagram and TikTok creators optimize their posting times for maximum engagement. It uses AI to analyze audience activity and provides personalized schedules and reminders, eliminating guesswork.

**Highlights:** AI-driven audience activity analysis, Personalized weekly posting schedule, Push reminders for peak engagement, Clear reasoning for time recommendations, Privacy-first approach, no logins required, Today and Week view for posting windows

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $7.99 | per month |
| Pro Yearly | $29.99 | per year |


## Frequently asked questions

### Is Invoice Maker free?

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

### Is When to Post AI free?

When to Post AI is free to download, with in-app purchases available.

### Which has better reviews, Invoice Maker or When to Post AI?

Invoice Maker is rated higher. Invoice Maker averages 4.9 out of 5 from 7 ratings, while When to Post AI averages 4.8 from 6 ratings.

### Do Invoice Maker or When to Post AI have ads?

Invoice Maker shows ads; When to Post AI does not.

### Which is updated more often, Invoice Maker or When to Post AI?

Invoice Maker ships an update every 3 days, and When to Post AI daily. Most recently, Invoice Maker was updated on October 1, 2026 and When to Post AI on October 3, 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.*