# KeepCalling International vs ZapNull

The clearest difference is in-app purchases: ZapNull at none against KeepCalling International's 10. ZapNull also leads on ads (none vs shown) and iOS requirement (13.0 vs 15.0). On price, update cadence and device support there is nothing between them.

Both are free to download. KeepCalling International sells 9 one-off in-app purchases. ZapNull asks for nothing beyond the download.

KeepCalling International ships an update every 3 weeks, ZapNull every 2 weeks. The most recent releases landed on November 4, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | KeepCalling International | ZapNull |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (19K ratings)](https://appshunter.io/ios/app/keepcalling-international/id518708790/reviews)** | — |
| Number of ratings | **19K** | — |
| Positive reviews | 39.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 53 MB | 42 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Miron Enterprises, LLC](https://appshunter.io/developer/518708793) | [SOLVIA TECH LIMITED](https://appshunter.io/developer/1874096664) |

## What reviewers say

### KeepCalling International

[App page](https://appshunter.io/ios/app/keepcalling-international/id518708790)

Make affordable international calls, send mobile recharges, and get travel eSIMs with this app. Enjoy high-quality VoIP calls, instant top-ups to over 160 countries, and seamless data plans for your trips abroad. Stay connected globally without expensive roaming fees.

**Highlights:** Low-rate international calls, Mobile recharge for 160+ countries, Travel eSIM data plans, High-quality VoIP calls, Integrated contacts, Speed dial, Set Caller ID

**Features:** Vision Pro support

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| $5 Voice Credit | $5.99 | one-time |
| $6 Voice Credit | $5.99 | one-time |
| £4 Voice Credit | $5.99 | one-time |
| Prepaid 10 CAD credit | $8.99 | one-time |
| Prepaid 10 EUR credit | $11.99 | one-time |
| $10 Voice Credit | $11.99 | one-time |
| Prepaid 20 CAD credit | $17.99 | one-time |
| $20 Voice Credit | $23.99 | one-time |
| Prepaid 20 GBP credit | $29.99 | one-time |

**What reviewers like**

- 🚀 Great first call
- 🚀 Easy to use app
- 🚀 Affordable, fast, and excellent sound
- 🚀 Seamless integration with iOS
- 🚀 Reliable service

**What reviewers complain about**

- 🐛 Busy for what
- 🐛 Hard to connect
- 🐛 Worst app ever, don't waste your money
- 🐛 Drops my calls every time
- 🐛 App is not working properly

**Reported bugs**

- Prompt doesn't work
- Can't find number

**Requested features**

- Add ability to add minutes/call time from within the app


### ZapNull

[App page](https://appshunter.io/ios/app/zapnull-team-messaging-app/id6758637141)

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

**In-app purchases:** none


## Frequently asked questions

### Is KeepCalling International free?

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

### Is ZapNull free?

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

### Do KeepCalling International or ZapNull have ads?

KeepCalling International shows ads; ZapNull does not.

### Which is updated more often, KeepCalling International or ZapNull?

KeepCalling International ships an update every 3 weeks, and ZapNull every 2 weeks. Most recently, KeepCalling International was updated on November 4, 2026 and ZapNull on October 28, 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.*