AngleLab vs SleepSign
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AngleLab
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AngleLab is an app that attaches two smart sensors and acquires the angle between segments. ■Overview Since it is a digital goniometer application between two segments, when applied to the human body, the relative angle between the parts where the sensor is attached can be obtained as 3-axis data. Sensor data can be monitored in real-time while being recorded on an iPad. In addition, by enabling video recording with the device’s video camera, it is possible to synchronize sensor data and video and play back after measurement. In addition, the resulting data can be output externally as CSV. ■For checking body range of motion! For example, when sensors are attached to the pelvis and thigh, joint angles of X, Y, Z axis: flexion/extension, adduction/abduction, internal rotation/external rotation can be obtained in real time, graphed, and numerical values can be output as CSV. ■ Requirements Xsens DOT sensor is prerequisite to use this app. In addition, it is necessary to obtain a license key issued by HELTEC Co., Ltd. For more information, please contact sensing@heltec.co.jp
SleepSign
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SleepSign-Cloud (スリープサイン クラウド)は、研究の参加者向けのアプリです。 研究機関からの指示に従って、操作ください。 ・日々の活動量計データを読み込みクラウドへ送信・登録します. ・就床・離床時刻を登録・修正します. ※研究内容によっては登録・修正できない場合もあります. ーーーーーーー よくあるご質問 ーーーーーーー 下記のWebサイトに掲載しております。 https://support.sleepsign-cloud.jp/faq/index.html ーーーーーーー 対応機種とご注意点 ーーーーーーー ・NFC(フェリカ)を使用するため、未搭載の端末(iPhone6/6S以前、iPad)ではご利用できません。 ・インターネット接続ができない環境でのご利用はできません。
Screenshots
Verdict
The clearest difference is update cadence: SleepSign at monthly against AngleLab's every 3 months. AngleLab's advantage is iOS requirement (13.0 vs 15.5). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
AngleLab ships an update every 3 months, SleepSign monthly. The most recent releases landed on September 12, 2026 and September 17, 2026 respectively.
| Parameter | AngleLab | SleepSign |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 — better | 15.5 |
| Further details — not scored | ||
| Size | 41 MB | 32 MB |
| Age rating | 17+ | 12+ |
| Developer | HELTEC Co., Ltd | Kissei Comtec Co., Ltd. |
In-app purchases
AngleLab
No in-app purchases
SleepSign
No in-app purchases









