# ISSY Sentry vs Day 1.

The clearest difference is in-app purchases: ISSY Sentry at none against Day 1.'s 3. ISSY Sentry also leads on iOS requirement (15.1 vs 17.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Day 1. sells 3 in-app purchases, starting at $4.99 per month. ISSY Sentry asks for nothing beyond the download.

ISSY Sentry ships an update every 2 months, Day 1. every 3 months. The most recent releases landed on October 15, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | ISSY Sentry | Day 1. |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Size | 26 MB | 167 MB |
| Requires iOS | **15.1** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [JOSUE LUIS BUESO RIVERA](https://appshunter.io/developer/1859450125) | [Anoop Chandrashekar](https://appshunter.io/developer/1869584951) |

## What reviewers say

### ISSY Sentry

[App page](https://appshunter.io/ios/app/issy-sentry/id6756495508)

**Features:** macOS Compatibility

**In-app purchases:** none


### Day 1.

[App page](https://appshunter.io/ios/app/day-1/id6757916121)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $4.99 | per month |
| Yearly Premium | $19.99 | per year |
| Family Premium | $29.99 | per year |


## Frequently asked questions

### Is ISSY Sentry free?

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

### Is Day 1. free?

Day 1. is free to download, with in-app purchases available.

### Do ISSY Sentry or Day 1. have ads?

Neither ISSY Sentry nor Day 1. shows ads.

### Which is updated more often, ISSY Sentry or Day 1.?

ISSY Sentry ships an update every 2 months, and Day 1. every 3 months. Most recently, ISSY Sentry was updated on October 15, 2026 and Day 1. on October 8, 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.*