# Bookfast.io vs Aiko

The clearest difference is price: Bookfast.io at Free against Aiko's $24.00. Bookfast.io also leads on iOS requirement (12.0 vs 26.0). Aiko's advantage is update cadence (every 6 weeks vs every 7 months) and chart position (#27 vs unranked). On ads and in-app purchases there is nothing between them.

Bookfast.io is free to download; Aiko costs $24.00 up front. Neither carries in-app purchases, so what you see is what you pay.

Bookfast.io ships an update every 7 months, Aiko every 6 weeks. The most recent releases landed on September 17, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Bookfast.io | Aiko |
| --- | --- | --- |
| Price | **Free** | $24.00 |
| Rating | — | **[4.7 (325 ratings)](https://appshunter.io/ios/app/aiko/id1672085276/reviews)** |
| Number of ratings | — | **325** |
| Positive reviews | — | 86.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 6 weeks** |
| Monetization | — | Paid |
| Best chart rank | — | **#27** |
| Size | 29 MB | 1.7 GB |
| Requires iOS | **12.0** | 26.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [Codaplant Limited](https://appshunter.io/developer/1335555538) | [Sindre Sorhus](https://appshunter.io/developer/328077650) |

## What reviewers say

### Bookfast.io

[App page](https://appshunter.io/ios/app/bookfastio/id1626776889)

**Features:** Apple Wallet, Vision Pro support

**In-app purchases:** none


### Aiko

[App page](https://appshunter.io/ios/app/aiko/id1672085276)

**Currently charting:** #27 Top Paid · Productivity (US App Store)

Convert audio to text locally on your device using advanced AI. Export transcriptions as subtitles and fix common errors with a word-replacement feature. Supports over 100 languages for high-quality, private transcription.

**Highlights:** On-device AI transcription, OpenAI Whisper powered, Export as subtitles, Word replacement for corrections, Supports 100+ languages, Privacy-focused, no data leaves device

**In-app purchases:** none

**What reviewers like**

- 🔒 Privacy-focused transcription
- 🚀 Accurate transcription
- 👍 Easy to use
- 🎉 Free and open-source
- 💪 Powerful AI model (Whisper)

**What reviewers complain about**

- 🐛 Crashes and stability issues
- ⏱️ Slow transcription speed
- 🔋 Resource-intensive
- 🤔 Inconsistent formatting

**Reported bugs**

- Repeated sentences
- Incorrect language detection
- Transcription loss on app exit

**Requested features**

- Support for multiple speakers
- Ability to select transcription model
- Export options for timestamps and speaker labels
- Background transcription mode


## Frequently asked questions

### Is Bookfast.io free?

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

### Is Aiko free?

Aiko costs $24.00, with no in-app purchases.

### Do Bookfast.io or Aiko have ads?

Neither Bookfast.io nor Aiko shows ads.

### Which is updated more often, Bookfast.io or Aiko?

Bookfast.io ships an update every 7 months, and Aiko every 6 weeks. Most recently, Bookfast.io was updated on September 17, 2026 and Aiko on September 23, 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.*