Comparison

Back Ext. Counter! vs 音でわかる!腹筋カウンター

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

Head to head
About

Back Ext. Counter!

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This App will support counting of Back Extension. The main function is counting of Back Extension. Main Function ・Count Back Extension ・Notifications ・Record Active Energy and Workouts to Apple Health. ・Save Results to Photo. ・View history. How to use ・Put iPhone on floor ・Tap start button. ・Keep your face close to iPhone screen. (Upper part) * ・Or count on iPhone screen tap. Active Energy ・Ex. METs 3.5, Weight 50 kg, Time 10 min. (3.5 - 1) x 50 x (10 / 60) x 1.05 = 21.86 kcal. Optional permission requests ・Apple Health: It is used to record data in Apple Health. ・Tracking: It is used to deliver personalized ads to you. ・Notifications: It is used to sending notifications. ・Photo Library: It is used to save image in Photo Library. Languages ・Japanese, English. *Dynamic Island devices not supported

About

音でわかる!腹筋カウンター

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腹筋中に画面を見なくても、音で回数がわかる腹筋カウンターです。 スマホの傾きで腹筋の動きを検知し、自動で回数をカウント。 音声・効果音・バイブで知らせるので、回数を数えながら腹筋する必要がありません。 【できること】 ・腹筋の自動カウント ・音声/効果音/バイブで回数通知 ・インターバル練習 ・メトロノーム ・カレンダー記録 ・過去の回数修正 ・広告なし ・個人データ収集なし 「今何回やったっけ?」をなくして、腹筋に集中できます。 基本機能は無料で使えます。 先週の記録を楽しく確認できる追加機能のみ、買い切り100円です。

Screenshots

Back Ext. Counter!4 screens
音でわかる!腹筋カウンター4 screens

Verdict

The call

The clearest difference is in-app purchases: Back Ext. Counter! at none against 音でわかる!腹筋カウンター's 1. Back Ext. Counter! also leads on iOS requirement (16.6 vs 18.2). 音でわかる!腹筋カウンター's advantage is ads (none vs shown) and update cadence (every 4 days vs every 4 months). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. 音でわかる!腹筋カウンター sells 1 one-off in-app purchase. Back Ext. Counter! asks for nothing beyond the download.

UpkeepUpdate frequency

Back Ext. Counter! ships an update every 4 months, 音でわかる!腹筋カウンター every 4 days. The most recent releases landed on September 10, 2026 and September 20, 2026 respectively.

Scorecard4 real differences · 2 level
Back Ext. Counter! versus 音でわかる!腹筋カウンター: the parameters behind the verdict, then further details
ParameterBack Ext. Counter!音でわかる!腹筋カウンター
PriceFreeFree
Update frequencyEvery 4 monthsEvery 4 days — better
AdsYesNo — better
In-app purchasesNo — betterYes
DevicesiPhoneiPhone
Requires iOS16.6 — better18.2
Further details — not scored
Size31 MB6 MB
Age rating17+4+
DeveloperIntersectYousuke Ota

In-app purchases

None

Back Ext. Counter!

No in-app purchases

1 purchases

音でわかる!腹筋カウンター

One-time1
  • プレミアム解放$0.49

Questions

Is Back Ext. Counter! free?
Back Ext. Counter! is free to download, with no in-app purchases.
Is 音でわかる!腹筋カウンター free?
音でわかる!腹筋カウンター is free to download, with in-app purchases available.
Do Back Ext. Counter! or 音でわかる!腹筋カウンター have ads?
Back Ext. Counter! shows ads; 音でわかる!腹筋カウンター does not.
Which is updated more often, Back Ext. Counter! or 音でわかる!腹筋カウンター?
Back Ext. Counter! ships an update every 4 months, and 音でわかる!腹筋カウンター every 4 days. Most recently, Back Ext. Counter! was updated on September 10, 2026 and 音でわかる!腹筋カウンター on September 20, 2026.

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