Comparison

GVOLTA PACK vs Simple Memo Notes

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

Handwrite on your smartwatch

Free

📊 Productivity

No ratingsView app →

About

GVOLTA PACK

Features

Read full description

いつでもどこでも手のひらの上でバッテリー管理 GVOLTA PACKはリチウムイオンバッテリーのための高性能バッテリー管理システムです。 IoT、クラウドサーバー、AIとの連携により、リアルタイムモニタリング、自動セルバランシング、診断機能を提供します。 - 主要機能 · 過充電/過放電防止 · 過電流遮断及び短絡保護 · AIベースのバッテリー管理とスマート通知

About

Simple Memo Notes

Features

Read full description

Simple Notes is a handwriting memo app for Apple Watch and iPhone. - Handwrite on your Apple Watch and see it on your iPhone right away. - Operate the Watch with one hand, even while it stays in your pocket. - Add and edit handwritten notes on iPhone too. - No account needed. Your notes are stored on your device. Jot down whatever comes to mind on the Watch on your wrist, without taking out your phone.

Screenshots

GVOLTA PACK2 screens

Simple Memo Notes1 screens

Verdict

The call

The clearest difference is in-app purchases: GVOLTA PACK at none against Simple Memo Notes's 2. GVOLTA PACK also leads on update cadence (weekly vs every 3 weeks) and iOS requirement (12.0 vs 26.4). On price, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Simple Memo Notes sells 2 in-app purchases, starting at $24.99 per month. GVOLTA PACK asks for nothing beyond the download.

UpkeepUpdate frequency

GVOLTA PACK ships an update weekly, Simple Memo Notes every 3 weeks. The most recent releases landed on November 8, 2026 and November 9, 2026 respectively.

Scorecard3 real differences · 3 level

GVOLTA PACK versus Simple Memo Notes: the parameters behind the verdict, then further details
Parameter	GVOLTA PACK	Simple Memo Notes
Price	Free	Free
Update frequency	Weekly — better	Every 3 weeks
Ads	No	No
In-app purchases	No — better	Yes
Devices	iPhone, iPad, iPod — better	iPhone, Apple Watch
Requires iOS	12.0 — better	26.4
Further details — not scored
Size	61 MB	1 MB
Age rating	4+	4+
Developer	GCWave	Kazuki Iwanaga

In-app purchases

None

GVOLTA PACK

No in-app purchases

2 purchases

Simple Memo Notes

Subscriptions2

MagicMemo Pro 月額プラン$24.991 Month
MagicMemo Pro 年額プラン$199.991 Year

Questions

Is GVOLTA PACK free?

GVOLTA PACK is free to download, with no in-app purchases.

Is Simple Memo Notes free?

Simple Memo Notes is free to download, with in-app purchases available.

Do GVOLTA PACK or Simple Memo Notes have ads?

Neither GVOLTA PACK nor Simple Memo Notes shows ads.

Which is updated more often, GVOLTA PACK or Simple Memo Notes?

GVOLTA PACK ships an update weekly, and Simple Memo Notes every 3 weeks. Most recently, GVOLTA PACK was updated on November 8, 2026 and Simple Memo Notes on November 9, 2026.