# VectorFi vs DayInBook

The clearest difference is update cadence: VectorFi at daily against DayInBook's every 3 days. VectorFi also leads on iOS requirement (15.1 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. VectorFi sells 3 in-app purchases, starting at $9.99 per month and DayInBook sells 4 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

VectorFi ships an update daily, DayInBook every 3 days. Both last shipped on October 28, 2026.

## The numbers

| Metric | VectorFi | DayInBook |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 3 days |
| Size | 50 MB | 15 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Noah Duran](https://appshunter.io/developer/1672490128) | [阳 曹](https://appshunter.io/developer/1599300891) |

## What reviewers say

### VectorFi

[App page](https://appshunter.io/ios/app/vectorfi-ai-expense-tracker/id6751174182)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| premium_monthly | $9.99 | per month |
| premium_yearly | $79.99 | per year |
| getafreetrail | Free | one-time |


### DayInBook

[App page](https://appshunter.io/ios/app/dayinbook-fire/id6756570968)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO月订阅 | $1.99 | per month |
| PRO年订阅 | $9.99 | per year |
| AI积分100 | $1.99 | one-time |
| AI积分1000 | $17.99 | one-time |


## Frequently asked questions

### Is VectorFi free?

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

### Is DayInBook free?

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

### Do VectorFi or DayInBook have ads?

Neither VectorFi nor DayInBook shows ads.

### Which is updated more often, VectorFi or DayInBook?

VectorFi ships an update daily, and DayInBook every 3 days. Most recently, VectorFi was updated on October 28, 2026 and DayInBook on October 28, 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.*