# nag vs ContactOne

The clearest difference is review sentiment: ContactOne at 100% against nag's 50%. ContactOne also leads on rating (5.0 vs 3.0). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. nag sells 5 in-app purchases, starting at $9.99 per 7 days and ContactOne sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ContactOne holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews point the same way: 50% of nag's written reviews are positive against 100% of ContactOne's.

Both ship on a similar rhythm, roughly every 2 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | nag | ContactOne |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/nag-persistent-reminders/id6478837661/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/contactone-perfect-contacts/id6792043733/reviews)** |
| Number of ratings | **2** | 1 |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 days | Every 2 days |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 113 MB | 9 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Robin Kunz](https://appshunter.io/developer/1584368340) | [ContactOne Inc.](https://appshunter.io/developer/6792043735) |

## What reviewers say

### nag

[App page](https://appshunter.io/ios/app/nag-persistent-reminders/id6478837661)

This app ensures you never forget tasks by repeatedly sending notifications until they are marked as complete. It offers flexible scheduling for recurring and one-time reminders, with options to snooze or dismiss directly from the notification. Additional features include a focus timer, logbook, and home screen widget.

**Highlights:** Reminders that don't give up, Postpone from notification, Reliable repeat scheduling, Set reminders in seconds, Focus timer and logbook, Works fully offline, No account needed

**Features:** Apple Watch app

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| nag Pro — Weekly | $9.99 | per 7 days |
| nag Pro — Yearly | $19.00 | per year |
| nag Pro — Yearly | $39.99 | per year |
| Annual Subscription | $44.99 | per year |
| nag Pro — Lifetime | $149.99 | one-time |


### ContactOne

[App page](https://appshunter.io/ios/app/contactone-perfect-contacts/id6792043733)

This app helps you organize your contacts by finding and merging duplicates across various accounts like iCloud, Google, and Microsoft. It allows you to review all changes before they are made and offers an easy undo option. The app also tidies up inconsistencies in phone numbers and labels.

**Highlights:** Finds and merges duplicate contacts, Supports iCloud, Google, and Microsoft accounts, Review changes before merging, One-tap undo functionality, Cleans up phone number and label inconsistencies, Account-aware merging

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $4.99 | per month |
| Annual | $24.99 | per year |
| Lifetime Access | $39.99 | one-time |


## Frequently asked questions

### Is nag free?

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

### Is ContactOne free?

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

### Which has better reviews, nag or ContactOne?

ContactOne is rated higher. nag averages 3.0 out of 5 from 2 ratings, while ContactOne averages 5.0 from 1 ratings.

### Do nag or ContactOne have ads?

Neither nag nor ContactOne shows ads.

### Which is updated more often, nag or ContactOne?

nag ships an update every 2 days, and ContactOne every 2 days. Most recently, nag was updated on October 30, 2026 and ContactOne on October 31, 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.*