Comparison

ともだちメモ vs BatteryNest

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

Head to head
About

ともだちメモ

Easily manage contact information and important dates for friends and their families. Get automatic reminders for upcoming birthdays and life events, ensuring you never miss an important occasion. Keep all essential details organized in one secure place.

Highlights
  • Record family details (name, birthday, grade)
  • Track life events (birthdays, graduations)
  • Automatic event notifications
  • Home screen event overview
  • Secure local data storage
  • Customizable Pro plan features
Features
Read full description

ともだちメモをご覧いただきありがとうございます。 このアプリは、0歳と1歳のふたりの娘の父親である私が、育児の合間を縫って個人で開発しているアプリになります。 企業や著名な開発者が提供するアプリと比べると、完成度や更新頻度など到底及ばないかもしれません。 しかしソフトウェアエンジニアで育児奮闘中の私だからこそ開発できるアプリに仕上がっていると思います。 ぜひお試しいただければ幸いです。 友人の子どもの名前、誕生日、学年——気づけばうろ覚えになっていませんか? お祝いのメッセージを送ろうとしたら誕生日が過ぎていた。入学したのを後で知った。そんな「あ、またやってしまった」をなくしたくてこのアプリを開発しました。 友人・知人の家族情報を家族単位でまるごと記録し、大切なイベントが近づくと自動でお知らせします。情報を見返すたびに、次に会ったときの話題が自然と浮かんでくる。そんな使い方ができるアプリです。 ■情報をまとめて記録 - 家族の名前・誕生日・学年・習い事・好きなもの - アレルギーなど気にかけたい情報 - 出産・入学・卒業・結婚記念日などのライフイベント - 写真・メモ・SNSアカウント ■イベントが近づくと自動で通知 - 誕生日の7日前と当日、入学・卒業の1ヶ月前と1週間前など、タイミングを逃さないようにプッシュ通知でお知らせします。 ■ホーム画面で今すぐ確認 - アプリを開いた瞬間に「もうすぐのイベント」「最近あったイベント」が一覧で表示されます。誰に気を配ればいいか、一目でわかります。 ■安心のセキュリティ 登録した情報は外部サーバーへ送信されず、お使いの iPhone 内にのみ保存されます。大切な友人の個人情報を、安心して記録できます。 ■Proプラン(買い切り) - 登録数 無制限 - 通知するイベントの種類をカスタマイズ - タグの追加・並び替え・削除(最大20件) - アプリのテーマ(外観)の変更 - 一度の購入で永続利用。月額課金はありません。

About

BatteryNest

Features
Read full description

Tiny animals living with your battery, right on your home screen. Their expressions change as your battery drains, and recover when you charge. A quiet little companion for every charging cycle. BatteryNest is a lifestyle widget app where small animal dioramas evolve based on your iPhone's battery level and charging state. 【Features】 ■ Battery-driven storytelling - Animals change expression and posture based on battery state - The lower the battery, the more rewarding a full charge feels - Charging finally has something to look forward to ■ Always-on home screen widget - Full support for iOS 18+ home screen widgets - A Nest picker appears automatically when you place the widget - Pin different animals to different widgets ■ A growing cast of characters - From soft and gentle to bold and curious — many personalities to choose from - Swap your home screen residents whenever you like - Seasonal limited Nests join from time to time ■ Simple, transparent monetization - Start for free and add Nests you love along the way - 1 ticket = own 1 Nest permanently - BatteryNest Pro unlocks every Nest ■ Zero ads, zero notifications - Designed to never interrupt your moment of calm - Just a little more joy in your charging routine ■ Privacy-first - Anonymous sign-in by default — no email required - Minimal data, account deletion completes in-app 【Who it's for】 - Anyone who loves customizing their home screen - People who want their battery routine to feel a little richer - Those who find joy in cute animal designs - Fans of seasonal aesthetics Terms of Service: https://taroshun32.github.io/app-legal/battery-nest/terms.html Privacy Policy: https://taroshun32.github.io/app-legal/battery-nest/privacy-policy.html

Screenshots

ともだちメモ4 screens
BatteryNest4 screens

Verdict

The call

The clearest difference is update cadence: BatteryNest at every 4 days against ともだちメモ's every 2 weeks. BatteryNest also leads on iOS requirement (15.1 vs 17.6). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. ともだちメモ sells 1 one-off in-app purchase and BatteryNest sells 5 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

ともだちメモ ships an update every 2 weeks, BatteryNest every 4 days. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 6 level
ともだちメモ versus BatteryNest: the parameters behind the verdict, then further details
ParameterともだちメモBatteryNest
PriceFreeFree
Positive reviews50.0% of reviews—
Update frequencyEvery 2 weeksEvery 4 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone, iPod — better
Requires iOS17.615.1 — better
Further details — not scored
Size3 MB60 MB
Age rating4+4+
DeveloperSuguru Yamadashunta nakamura

In-app purchases

1 purchases

ともだちメモ

One-time1
  • Proプラン (買い切り)$3.99
5 purchases

BatteryNest

Subscriptions2
  • BatteryNest Pro (Monthly)$1.991 Month
  • BatteryNest Pro (Annual)$11.991 Year
One-time3
  • Ticket ×1$0.49
  • Ticket ×5$1.99
  • Ticket ×12$4.99

Questions

Is ともだちメモ free?
ともだちメモ is free to download, with in-app purchases available.
Is BatteryNest free?
BatteryNest is free to download, with in-app purchases available.
Do ともだちメモ or BatteryNest have ads?
Neither ともだちメモ nor BatteryNest shows ads.
Which is updated more often, ともだちメモ or BatteryNest?
ともだちメモ ships an update every 2 weeks, and BatteryNest every 4 days. Most recently, ともだちメモ was updated on November 9, 2026 and BatteryNest on October 31, 2026.

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