# WhatCall vs Build24

WhatCall and Build24 are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. WhatCall sells 5 one-off in-app purchases and Build24 sells 2 in-app purchases, starting at $29.99 per year. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 23, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | WhatCall | Build24 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (601 ratings)](https://appshunter.io/ios/app/whatcall/id1260967308/reviews)** | — |
| Number of ratings | **601** | — |
| Positive reviews | 54.5% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 4 MB | 19 MB |
| Requires iOS | **17.0** | 18.6 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Innovative Developers LTD](https://appshunter.io/developer/947764447) | [Yerlan Kussainov](https://appshunter.io/developer/1477982880) |

## What reviewers say

### WhatCall

[App page](https://appshunter.io/ios/app/whatcall/id1260967308)

This app allows you to bypass ringing and connect directly to someone's voicemail. It provides an instant missed call notification, giving you an excuse to have tried calling while avoiding actual conversation. It works globally on most networks, including landlines and mobiles.

**Highlights:** Instant voicemail connection, Missed call notification, Global network compatibility, Automatic dial code detection, Bypass ringing, Leave messages without conversation

**Features:** Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 5 credit pack | $2.99 | one-time |
| 12 credit pack | $5.99 | one-time |
| 20 credit pack | $7.99 | one-time |
| 30 credit pack | $9.99 | one-time |
| 40 credit pack | $12.99 | one-time |

**What reviewers like**

- 🚀 Works well
- 👍 Great app
- 🚀 Convenient
- 🚀 Indispensable
- 👍 Accessible to customers

**What reviewers complain about**

- 🐛 Doesn't work
- 🐛 Calls go directly to person, not voicemail
- 🐛 Stuck on 'connecting' screen
- 🐛 Won't leave voicemail
- 🐛 Takes credits but doesn't work

**Reported bugs**

- Calls go directly to person, not voicemail
- Stuck on 'connecting' screen
- Won't leave voicemail
- Takes credits but doesn't work
- Verification issues

**Requested features**

- Option to display 'unknown' or 'unverified' number
- Prerecorded voicemail feature


### Build24

[App page](https://appshunter.io/ios/app/build24-construction-calc/id6761297677)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Build24 Premium Yearly | $29.99 | per year |
| Lifetime Premium | Free | one-time |


## Frequently asked questions

### Is WhatCall free?

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

### Is Build24 free?

Build24 is free to download, with in-app purchases available.

### Do WhatCall or Build24 have ads?

Neither WhatCall nor Build24 shows ads.

### Which is updated more often, WhatCall or Build24?

WhatCall ships an update every 3 months, and Build24 every 3 months. Most recently, WhatCall was updated on October 23, 2026 and Build24 on October 15, 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.*