# flex vs TODO Slayer

The clearest difference is in-app purchases: flex at none against TODO Slayer's 3. flex also leads on update cadence (every 2 days vs every 9 days) and iOS requirement (16.4 vs 26.5). On price, ads and device support there is nothing between them.

Both are free to download. TODO Slayer sells 3 one-off in-app purchases. flex asks for nothing beyond the download.

flex ships an update every 2 days, TODO Slayer every 9 days. The most recent releases landed on November 7, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | flex | TODO Slayer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.4 (18 ratings)](https://appshunter.io/ios/app/flex-relations-driven-ax/id1535757707/reviews)** | — |
| Number of ratings | **18** | — |
| Positive reviews | 28.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 9 days |
| Monetization | Free | — |
| Size | 501 MB | 8 MB |
| Requires iOS | **16.4** | 26.5 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [플렉스 주식회사](https://appshunter.io/developer/1535757709) | [Dongmin Yu](https://appshunter.io/developer/1871033523) |

## What reviewers say

### flex

[App page](https://appshunter.io/ios/app/flex-relations-driven-ax/id1535757707)

This HR platform streamlines employee management with features for attendance tracking, leave requests, approvals, and access to company information. It offers a mobile-first experience for HR tasks, aiming to improve organizational efficiency through AI-driven insights.

**Highlights:** Mobile HR access, One-touch attendance recording, Leave and overtime requests/approvals, View payslips and company info, Task and announcement feeds, Automated leave management, Electronic approvals

**In-app purchases:** none

**What reviewers like**

- 👍 Intuitive and convenient
- 👍 Good design and user-friendly
- 👍 Useful for leave and salary confirmation
- 👍 Convenient for attendance management
- 👍 Better than previous apps

**What reviewers complain about**

- 🐛 Frequent crashes and freezes
- 🐛 Login issues and errors
- 🐛 Poor UI/UX design
- 🐛 Slow performance
- 🐛 Inconsistent functionality

**Reported bugs**

- App crashes immediately after launch
- App won't launch
- App freezes or becomes unresponsive
- Login fails or infinite loading
- Attendance buttons not working

**Requested features**

- Allow writing reviews via app
- Add widget for attendance
- Add remaining time display
- Improve UI for break time registration
- Add Apple Shortcuts support


### TODO Slayer

[App page](https://appshunter.io/ios/app/todo-slayer/id6794192291)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| A Potion for the Hero | $0.99 | one-time |
| Three Potions for the Hero | $2.99 | one-time |
| A Crate of Potions | $4.99 | one-time |


## Frequently asked questions

### Is flex free?

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

### Is TODO Slayer free?

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

### Do flex or TODO Slayer have ads?

Neither flex nor TODO Slayer shows ads.

### Which is updated more often, flex or TODO Slayer?

flex ships an update every 2 days, and TODO Slayer every 9 days. Most recently, flex was updated on November 7, 2026 and TODO Slayer on November 6, 2026.

---

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