# Paychex Flex vs IW Local 37

The clearest difference is ratings volume: Paychex Flex at 577K against IW Local 37's 7. Paychex Flex also leads on update cadence (monthly vs every 4 months) and chart position (#42 vs unranked). IW Local 37's advantage is iOS requirement (12.0 vs 17.4). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.8 for Paychex Flex against 4.7 for IW Local 37. That said, the two scores are not equally well evidenced: Paychex Flex has 577K ratings behind it against 7, so its average is the more settled of the two.

Paychex Flex ships an update monthly, IW Local 37 every 4 months. The most recent releases landed on November 3, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Paychex Flex | IW Local 37 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (577K ratings)](https://appshunter.io/ios/app/paychex-flex/id527740152/reviews)** | [4.7 (7 ratings)](https://appshunter.io/ios/app/iw-local-37/id1477474904/reviews) |
| Number of ratings | **577K** | 7 |
| Positive reviews | 12.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 4 months |
| Monetization | Free | Free |
| Best chart rank | **#42** | — |
| Size | 330 MB | 128 MB |
| Requires iOS | 17.4 | **12.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 12+ | 17+ |
| Developer | [Paychex, Inc](https://appshunter.io/developer/476461118) | [Local 37 Iron Workers](https://appshunter.io/developer/1477474903) |

## What reviewers say

### Paychex Flex

[App page](https://appshunter.io/ios/app/paychex-flex/id527740152)

**Currently charting:** #42 Top Free · Business (US App Store)

This app connects employers and employees to essential payroll and benefits functions. Employers can submit payroll, access reports, and view employee data. Employees can view pay stubs, manage retirement contributions, and access benefit details.

**Highlights:** Submit payroll on the go, Access payroll reports, View employee pay stubs and tax documents, Manage retirement contributions and investments, Access health and benefits information, Touch ID and Face ID authentication

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- ⭐ Convenient access to payroll information
- 🚀 Easy to use and navigate
- 💻 Helpful for both employers and employees

**What reviewers complain about**

- 🐢 Slow and unresponsive app performance
- 🐛 Frequent crashes and glitches
- 🔒 Security issues with account access
- 💸 Concerns about privacy and data sharing

**Reported bugs**

- Login screen freezes or fails to load
- Time tracking inaccuracies and missed punches
- Inconsistent app behavior across devices

**Requested features**

- Ability to edit time punches directly in the app
- More detailed payroll information and reporting
- Improved notification system for payroll updates


### IW Local 37

[App page](https://appshunter.io/ios/app/iw-local-37/id1477474904)

Stay informed about your union membership with important updates and notifications. Access organizing materials, make online dues payments, and view the latest social media posts from your local chapter.

**Highlights:** Push notifications for updates, Organizing material access, Online dues payments, Social media feed integration, Membership information

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Paychex Flex free?

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

### Is IW Local 37 free?

IW Local 37 is free to download, with no in-app purchases.

### Which has better reviews, Paychex Flex or IW Local 37?

Paychex Flex is rated higher. Paychex Flex averages 4.8 out of 5 from 577K ratings, while IW Local 37 averages 4.7 from 7 ratings.

### Do Paychex Flex or IW Local 37 have ads?

Neither Paychex Flex nor IW Local 37 shows ads.

### Which is updated more often, Paychex Flex or IW Local 37?

Paychex Flex ships an update monthly, and IW Local 37 every 4 months. Most recently, Paychex Flex was updated on November 3, 2026 and IW Local 37 on October 29, 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.*