Comparison

shelfs vs Sailer

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

Head to head
About

shelfs

Listen to community radio programs up to 7 days after they air. Manage your favorite shows in playlists that automatically update with the latest episodes. Enjoy local radio content on your schedule.

Highlights
  • 7-day catch-up playback
  • Playlist management
  • Automatic episode updates
  • Cross-search by program, station, genre
  • Background playback
  • Resume playback
Features
Read full description

shelfs(シェルフス) コミュニティFMを7日間“あとから”聴ける コミュニティFMの番組を、放送終了後7日間の聞き逃しで“あとから”聴けます。再生対象は各局がshelfs対応に設定した番組のみ。お気に入りの番組タイトルをプレイリストで管理すれば、同じリストでも毎週自動で最新回へ更新。利用は無料。対応番組は順次拡大中。 shelfs(シェルフス)は、コミュニティFMの放送を終了後7日間聞き逃し再生できるアプリです。忙しくてリアルタイムで聴けない番組も、スマートフォンで“あとから”楽しめます。 ◆ プレイリスト(My shelf)の考え方 ・番組タイトルで管理:ユーザーが番組タイトルをプレイリストに追加します。 ・ジャンル指定:プレイリストには用意されたジャンルから1つ指定できます。 ・ローリング更新:聞き逃し期間は7日間。同じプレイリストでも翌週には各番組の最新回に入れ替わります。 ◆ 対応番組について ・再生できるのは、各ラジオ局がshelfs対応に設定した番組のみです。 ・対応局・番組は順次拡大中。最新の対応状況はアプリ内でご確認ください。 ◆ 主な機能 ・聞き逃し再生(7日間) ・番組/局/ジャンルでの横断検索 ・お気に入り登録/プレイリスト管理(番組タイトル単位) ・バックグラウンド再生/続きから再生 ◆ こんな人に ・放送時間に合わせづらいけれど、地元の番組を逃したくない ・通勤・家事などのすき間時間で、信頼できる“地域の声”を聴きたい 注:番組の公開可否・公開期間は局/番組により異なる場合があります。対応状況は予告なく変更されることがあります。

About

Sailer

This app allows precise audio playback control with a waveform display for easy navigation. It features markers for repeating sections, adjustable speed and pitch, and supports various audio formats. Pro features include spectrogram display and transcription.

Highlights
  • Waveform seeking
  • Adjustable playback speed
  • Adjustable pitch
  • Marker system for looping
  • Spectrogram display (Pro)
  • Audio export (Pro)
Features
Read full description

Sailer is a simple audio file player with a waveform display. Just scroll the waveform and go straight to the moment you’re looking for — more intuitive and precise than dragging a tiny seek bar. The marker feature makes it easy to repeat specific parts, perfect for transcription, music practice, language learning, and more. Supports MP3, M4A, WAV, FLAC, MP4, and other common formats. Features: • Seek by scrolling the waveform. • Pinch-to-zoom for more precision. • Use markers to bookmark specific positions*. • Double-tap (or two-finger tap) between markers to play only that region (loop supported). • Adjust playback speed from 0.25× to 4.0×. • Adjust the pitch and apply audio effects. • Add notes for future reference. *Markers and notes are saved as a sidecar file, so your original audio file remains unmodified. Pro Features (one-time purchase): • Display a spectrogram. • Export the selected region. • Export markers as TXT, CSV, or JSON. • Transcribe the selected region.

Screenshots

shelfs3 screens
Sailer4 screens

Verdict

The call

The clearest difference is in-app purchases: shelfs at none against Sailer's 2. shelfs also leads on iOS requirement (18.6 vs 26.0). On price, review sentiment, update cadence and ads 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. Sailer sells 2 one-off in-app purchases. shelfs asks for nothing beyond the download.

UpkeepUpdate frequency

shelfs ships an update fortnightly, Sailer every 3 weeks. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

Scorecard3 real differences · 7 level
shelfs versus Sailer: the parameters behind the verdict, then further details
ParametershelfsSailer
PriceFreeFree
Rating—4.3 (4 ratings) — better
Positive reviews0.0% of reviews0.0% of reviews
Number of ratings—4 — better
Update frequencyFortnightly — betterEvery 3 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhoneiPhone, iPad — better
Requires iOS18.6 — better26.0
Further details — not scored
Size7 MB14 MB
Age rating12+4+
DeveloperSmart EngineeringShu Kyogoku

Customer experience

shelfs

Written reviews1 reviews
Positive0.0%
Neutral100.0%
Negative0.0%

Sailer

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

shelfs

No in-app purchases

2 purchases

Sailer

One-time2
  • 7-Day TrialFree
  • Sailer Pro$19.99

Questions

Is shelfs free?
shelfs is free to download, with no in-app purchases.
Is Sailer free?
Sailer is free to download, with in-app purchases available.
Do shelfs or Sailer have ads?
Neither shelfs nor Sailer shows ads.
Which is updated more often, shelfs or Sailer?
shelfs ships an update fortnightly, and Sailer every 3 weeks. Most recently, shelfs was updated on November 3, 2026 and Sailer on November 5, 2026.

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