AiAlmace vs Decibel
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AiAlmace
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AiAlmace is a software to consult AiAlmace dictionaries. With AiAlmace you can consult a full encoding dictionary like as TCAF (Tableau de conjugaison de l'ancien français, Machio OKADA et Hitoshi OGURISU); in this dictionary you can search every part of dictionary (all the verbal forms). With AiAlmace you can also consult an image based dictionary like as VanDaele; in this dictionary you can search only the headwords and their variantes, but all of them are linked with the page where they appears. So you can easily get the page you want to see. If you look up "amor", you can get the image of the page where this word appears as head word. Differently from a full encoding dictionary, an image based dictionaries has very simple structure. If you examine carefully the structure of "VanDaele", you will be able to make you own dictionary by yourself. Be careful: To use AiAlmace you have to download a (gratuitous) dictionary at http://www.eonet.ne.jp/~ogurisu/AiSeries.html and install it via iTunes' file sharing.
Decibel
This application offers noise detection and measurement capabilities, providing reference data for sound levels anytime, anywhere. It also includes location tagging for detection points and allows for the export of audio files for sharing. While it aims for accuracy, it is intended for private reference and cannot fully replace professional equipment.
- Noise detection
- Reference measurement data
- Detection point location
- Audio file export
- Private reference tool
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The decibel tester App can provide you with noise detection reference anytime, anywhere, and also provide detection point location information. You can also export audio files for sharing at any time. Although we provide as accurate measurement data as possible, this App still cannot completely replace professional measurement equipment and is tightly used for private reference.
Screenshots
Verdict
The clearest difference is in-app purchases: AiAlmace at none against Decibel's 4. AiAlmace also leads on ads (none vs shown). Decibel's advantage is update cadence (every 9 days vs every 28 months) and iOS requirement (13.0 vs 15.0). On price and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Decibel sells 4 one-off in-app purchases. AiAlmace asks for nothing beyond the download.
AiAlmace ships an update every 28 months, Decibel every 9 days. The most recent releases landed on October 21, 2026 and October 29, 2026 respectively.
| Parameter | AiAlmace | Decibel |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.7 (298 ratings) — better |
| Positive reviews | — | 75.0% of reviews |
| Number of ratings | — | 298 — better |
| Update frequency | Every 28 months | Every 9 days — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 94 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Hitoshi Ogurisu | 文智 洪 |
In-app purchases
AiAlmace
No in-app purchases
Decibel
- Small Support$0.99
- Ad removal service.$1.99
- Warm Support$2.99
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- Generous Support$4.99








