PostalCal vs iWarmU
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PostalCal
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.
- Rotating days off calendar
- Payday display
- Postal observed holidays
- Customizable color rotations
- Add personal events
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Postal Employee Day Off Calendar Are you a postal employee with rotating days off? This app is for you. Postal Employee Day Off Calendar is a simple, purpose-built calendar for USPS postal workers and their families. It clearly shows every pay day and postal‑observed holiday so you always know what’s coming. Instead of buying a new paper color calendar every year, make a one‑time purchase and keep everything on your phone. Want more control? Unlock two optional upgrades: Customize calendar colors to match your own rotation. Add your own events directly to the calendar.
iWarmU
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.
- Automatic device search and connection
- 3 temperature levels
- Stepless temperature control
- Quick warming settings
- Timing settings
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Warm clothes and socks control APP, automatically search for your warm items and pair and connect. 3 levels and stepless temperature control settings, and provide quick warming/timing settings.
Screenshots
Verdict
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 (#154 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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | PostalCal | iWarmU |
|---|---|---|
| Price | $5.99 | Free — better |
| Rating | 5.0 (4 ratings) — better | 2.1 (73 ratings) |
| Positive reviews | 72.2% of reviews — better | 20.2% of reviews |
| Number of ratings | 4 | 73 — better |
| Update frequency | Every 9 months | Every 6 months — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Best chart rank | #154 — better | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 26.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Andrew Franco | Shenzhen Zhongzhi Liancheng Technology Co., Ltd. |
Customer experience
PostalCal
iWarmU
Bugs and requests
PostalCal
Reported bugs
15 issues- 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
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- Juneteenth holiday not updated
- Memorial Day date incorrect (May 24th instead of 31st)
- Graphic issues on iPad
- App crashes on opening
- App won't open after iOS update
- App crashes on current month
- Error on August 23rd (should be black, not blue)
- Pay period info missing
- Cannot swipe back
- App kicks out when selecting a month
Requested features
13 requests- Sync with other calendars (iCal)
- Add custom events option
- Ability to add notes
- Integrate weather
- Add mail volumes manually
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- See a couple years ahead
- Update for future years
- Add events to days
- Link days off with iOS calendar
- Ability to shut off unwanted colors
- Mark days taken off (s/l or a/l)
- Add non-postal holidays
- Option to add notes for a fee
iWarmU
Not enough reviews yet to summarise bugs or requests.
In-app purchases
PostalCal
- Custom Calendar Colors$3.99
- Calendar Events$4.99
iWarmU
No in-app purchases
