# Acrobits vs iMI

The clearest difference is price: iMI at Free against Acrobits's $6.99. iMI also leads on rating (5.0 vs 4.2) and update cadence (every 4 days vs every 9 days). Acrobits's advantage is ratings volume (47 vs 3) and chart position (#130 vs unranked). On ads, in-app purchases and device support there is nothing between them.

iMI is free to download; Acrobits costs $6.99 up front. Acrobits sells 1 one-off in-app purchase and iMI sells 5 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

iMI holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Acrobits has 47 ratings behind it against 3, so its average is the more settled of the two.

Acrobits ships an update every 9 days, iMI every 4 days. The most recent releases landed on November 8, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Acrobits | iMI |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| Rating | [4.2 (47 ratings)](https://appshunter.io/ios/app/acrobits-voip-sip-softphone/id314192799/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/imi-inference/id6760208856/reviews)** |
| Number of ratings | **47** | 3 |
| Positive reviews | 67.6% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 9 days | **Every 4 days** |
| Monetization | Paid | **Freemium** |
| Best chart rank | **#130** | — |
| Size | 67 MB | 12 MB |
| Requires iOS | **16.0** | 18.6 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 17+ | 12+ |
| Developer | [Acrobits](https://appshunter.io/developer/314192802) | [Michael Kaminski](https://appshunter.io/developer/1870159381) |

## What reviewers say

### Acrobits

[App page](https://appshunter.io/ios/app/acrobits-voip-sip-softphone/id314192799)

**Currently charting:** #130 Top Paid · Productivity (US App Store)

This powerful SIP softphone allows voice and video calls, messaging, and secure communication over WiFi and mobile data. It works with existing SIP accounts and offers lifetime support and updates.

**Highlights:** Voice and video calling, Secure encrypted calls, Push notifications, Call handover (WiFi/data), Multi-device compatibility, Standards-based SIP client, Customizable settings

**Features:** Siri integration, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ZRTP For Outgoing Calls | $24.99 | one-time |

**What reviewers like**

- 🚀 Amazing
- 👍 Great technical support
- 🚀 Works seamlessly
- 👍 Excellent app
- 🚀 Reliable and works great

**What reviewers complain about**

- 🐛 No microphone support.
- 💰 Deduct subscription without inform user
- 🔒 No option to block calls
- 💤 Crashes instantly on os 10
- 🐛 Crashes instead of connecting to call when opening from push notification or manually from home screen!!!

**Reported bugs**

- Crashes on open in iOS 9.3
- Keeps wiping out all settings and history
- Deletes configuration randomly
- Failed to received CallerID
- Periodically disables itself

**Requested features**

- SMS support
- Ability to block calls
- Customizable ringtones
- Conference calling
- Ability to select original iPhone ringtones


### iMI

[App page](https://appshunter.io/ios/app/imi-inference/id6760208856)

This AI assistant is designed for manufacturing professionals on the shop floor. It provides answers to technical questions, helps troubleshoot issues, and offers tools for optimizing processes and calculating ROI. Securely store and access your private manufacturing documents.

**Highlights:** AI-powered manufacturing Q&A, G-code optimization, Machining strategy generation, Work instruction drafting, ROI calculator, Private on-device document vault

**Features:** Family Sharing

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ArloInference Starter | $9.99 | per month |
| ArloInference Pro | $19.99 | per month |
| 250 Uses — Project Sprint | $4.99 | one-time |
| 600 Uses — Heavy Week Pack | $9.99 | one-time |
| 1500 Uses — Power User Pack | $19.99 | one-time |


## Frequently asked questions

### Is Acrobits free?

Acrobits costs $6.99, and also offers in-app purchases.

### Is iMI free?

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

### Which has better reviews, Acrobits or iMI?

iMI is rated higher. Acrobits averages 4.2 out of 5 from 47 ratings, while iMI averages 5.0 from 3 ratings.

### Do Acrobits or iMI have ads?

Neither Acrobits nor iMI shows ads.

### Which is updated more often, Acrobits or iMI?

Acrobits ships an update every 9 days, and iMI every 4 days. Most recently, Acrobits was updated on November 8, 2026 and iMI 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.*