# PostalCal vs iWarmU

The clearest difference is review sentiment: PostalCal at 72% against iWarmU's 20%. PostalCal also leads on rating (5.0 vs 2.1) and chart position (#165 vs unranked). iWarmU's advantage is price (Free vs $5.99) and in-app purchases (none vs 2). On update cadence, ads and device support there is nothing between them.

iWarmU is free to download; PostalCal costs $5.99 up front. PostalCal sells 2 one-off in-app purchases. iWarmU asks for nothing beyond the download.

PostalCal holds the better App Store score, 5.0 against 2.1. That said, the two scores are not equally well evidenced: iWarmU has 73 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 72% of PostalCal's written reviews are positive against 20% of iWarmU's.

PostalCal ships an update every 9 months, iWarmU every 6 months. The most recent releases landed on October 24, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | PostalCal | iWarmU |
| --- | --- | --- |
| Price | $5.99 | **Free** |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/postalcal/id555893957/reviews)** | [2.1 (73 ratings)](https://appshunter.io/ios/app/iwarmu/id1576856224/reviews) |
| Number of ratings | 4 | **73** |
| Positive reviews | **72.2% of reviews** | 20.2% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 6 months** |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#165** | — |
| Size | 1 MB | 4 MB |
| Requires iOS | 26.0 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Andrew Franco](https://appshunter.io/developer/540639752) | [Shenzhen Zhongzhi Liancheng Technology Co., Ltd.](https://appshunter.io/developer/1457957513) |

## What reviewers say

### PostalCal

[App page](https://appshunter.io/ios/app/postalcal/id555893957)

**Currently charting:** #165 Top Paid · Utilities (US App Store)

This calendar app is designed for postal employees with rotating days off. It displays paydays and postal holidays, eliminating the need for annual paper calendars. Optional in-app purchases allow for color customization and adding personal events.

**Highlights:** Rotating days off calendar, Payday display, Postal observed holidays, Customizable color rotations, Add personal events

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Custom Calendar Colors | $3.99 | one-time |
| Calendar Events | $4.99 | one-time |

**What reviewers like**

- 👍 Easy to use calendar
- 🗓️ Helpful for planning
- 👨‍👩‍👧‍👦 Simplifies family scheduling
- 🎨 Customizable colors
- ✅ Great functionality

**What reviewers complain about**

- 🐛 Crashing issues
- 📅 Outdated information
- ⏳ Lacks future year updates
- ❌ Re-purchase required
- 🐛 App not opening

**Reported bugs**

- Re-purchase required after payment
- No dates after 11th day
- No 10 shows up
- Last weeks of months have dots instead of dates
- Month & Year not displayed

**Requested features**

- Sync with other calendars (iCal)
- Add custom events option
- Ability to add notes
- Integrate weather
- Add mail volumes manually


### iWarmU

[App page](https://appshunter.io/ios/app/iwarmu/id1576856224)

Control your warm clothing and socks with this app. It automatically searches for and connects to your devices, offering precise temperature adjustments and quick warming or timing functions.

**Highlights:** Automatic device search and connection, 3 temperature levels, Stepless temperature control, Quick warming settings, Timing settings

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

**In-app purchases:** none


## Frequently asked questions

### Is PostalCal free?

PostalCal costs $5.99, and also offers in-app purchases.

### Is iWarmU free?

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

### Which has better reviews, PostalCal or iWarmU?

PostalCal is rated higher. PostalCal averages 5.0 out of 5 from 4 ratings, while iWarmU averages 2.1 from 73 ratings.

### Do PostalCal or iWarmU have ads?

Neither PostalCal nor iWarmU shows ads.

### Which is updated more often, PostalCal or iWarmU?

PostalCal ships an update every 9 months, and iWarmU every 6 months. Most recently, PostalCal was updated on October 24, 2026 and iWarmU on October 22, 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.*